Particle Physics, Astroparticle Physics and Cosmology (PAC) https://heika-research.de/en/research/particle-physics-astroparticle-physics-and-cosmology-pac en Preparing a large-scale DARWIN demonstrator with a HV test facility for cryofluids and corresponding KASSIOPEIA field simulations https://heika-research.de/en/research/particle-physics-astroparticle-physics-and-cosmology-pac/preparing-large-scale-darwin <span class="field field--name-title field--type-string field--label-hidden">Preparing a large-scale DARWIN demonstrator with a HV test facility for cryofluids and corresponding KASSIOPEIA field simulations</span> <span class="field field--name-uid field--type-entity-reference field--label-hidden"><span lang="" about="/en/user/31" typeof="schema:Person" property="schema:name" datatype="" content="Maria Garcia Hernandez">Maria Garcia H…</span></span> <span class="field field--name-created field--type-created field--label-hidden">Thu, 08/30/2018 - 14:04</span> <div class="clearfix text-formatted field field--name-field-summary field--type-text-long field--label-hidden field__item"><p>One main pillar of the cluster "Exploring Dark Matter" will be our leading contributions to the international effort leading up to the DARWIN observatory, which is a very large dual-phase time projection chamber (TPC) filled with xenon. DARWIN will be the ultimate stage in the successful line of XENON detectors developed over the last decade to which researchers from MPIK have made long-standing leading contributions. For an exposure of 50 tons over four years, DARWIN will improve the sensitivity of near-future direct Detection experiments by an order of Magnitude. For high WIMP masses, DARWIN will be of crucial importance to complement information from indirect WIMP searches with different messenger particles and WIMP production at the LHC. DARWIN will reach a sensitivity to WIMP cross sections down to the neutrino floor, where the coherent scattering of MeV-scale neutrinos off xenon nuclei forms an irreducible background.<br /> The Cluster will operate, together with other members of the DARWIN consortium, a large-scale vertical drift Demonstrator. This facility will be contructed by reaearchers from KIT and Heidelberg and will ultimately be installed at the LNGS Underground lab. With a mass of 500 kg this demonstrator in itself will be the second largest xenonbased DM experiment in itself.<br /> In this Project Proposal we would like to perform initial works to prepare a rapid build-up of the DARWIN demonstrator. To this end, we want to set up a HV test facility for noble-gas based cryofluids to be housed in an existing cryostat at KIT. This requires the purchase of the corresponding hardware (precisionHV supply unit for up to 200 kV to generate strong drift fields in the cryofluid) at an expericenced supplier (FUG). This unit will be operated by a hardware-oriented postdoctoral reseearcher at KIT.<br /> Finally, the postodoctal researcher will lead the design efforts of the cryostat for the DARWIN demonstrator, which will be manufactured on-site or by an industrial partner. </p></div> <div class="field field--name-field-research-bridges field--type-entity-reference field--label-above"> <div class="field__label">Research bridges</div> <div class="field__items"> <div class="field__item"><a href="/en/research/particle-physics-astroparticle-physics-and-cosmology-pac" hreflang="en">Particle Physics, Astroparticle Physics and Cosmology (PAC)</a></div> </div> </div> <div class="field field--name-field-start-date field--type-datetime field--label-above"> <div class="field__label">Start date</div> <div class="field__item"> <time datetime="2018-01-01T12:00:00Z" class="datetime">01/01/2018</time> </div> </div> <div class="field field--name-field-end-date field--type-datetime field--label-hidden field__item"><time datetime="2018-12-31T12:00:00Z" class="datetime">12/31/2018</time> </div> <div class="field field--name-field-contact-person field--type-entity-reference field--label-above"> <div class="field__label"><h3>Project management</h3></div> <div class="field__items"> <article data-history-node-id="94" role="article" about="/index.php/en/prof-dr-stephanie-hansmann-menzemer" class="node node--type-people-profile node--view-mode-teaser"> <div class="node__content"> <div class="field field--name-field-profile-picture field--type-entity-reference field--label-hidden field__item"><article class="media media--type-image media--view-mode-portrait-image"> <div class="field field--name-field-media-image field--type-image field--label-hidden field__item"> <picture> <!--[if IE 9]><video style="display: none;"><![endif]--> <source srcset="/sites/default/files/styles/portrait_1x_tablet/public/2018-08/BD_member_SHansmannMenzemer.jpg?h=b374aae6&amp;itok=Uvs9PesD 1x, /sites/default/files/styles/portrait_2x_tablet/public/2018-08/BD_member_SHansmannMenzemer.jpg?h=b374aae6&amp;itok=x6QTy6-G 2x" media="all and (min-width: 769px)" type="image/jpeg"/> <source srcset="/sites/default/files/styles/portrait_1x_tablet/public/2018-08/BD_member_SHansmannMenzemer.jpg?h=b374aae6&amp;itok=Uvs9PesD 1x, /sites/default/files/styles/portrait_2x_tablet/public/2018-08/BD_member_SHansmannMenzemer.jpg?h=b374aae6&amp;itok=x6QTy6-G 2x" media="all and (min-width: 481px) and (max-width: 768px)" type="image/jpeg"/> <source srcset="/sites/default/files/styles/portrait_1x_phone/public/2018-08/BD_member_SHansmannMenzemer.jpg?h=b374aae6&amp;itok=Q5VKvDYw 1x, /sites/default/files/styles/portrait_1x_tablet/public/2018-08/BD_member_SHansmannMenzemer.jpg?h=b374aae6&amp;itok=Uvs9PesD 2x" media="all and (max-width: 480px)" type="image/jpeg"/> <!--[if IE 9]></video><![endif]--> <img src="/sites/default/files/styles/portrait_1x_tablet/public/2018-08/BD_member_SHansmannMenzemer.jpg?h=b374aae6&amp;itok=Uvs9PesD" alt="Prof. Dr. Stephanie Hansmann-Menzemer" typeof="foaf:Image" /> </picture> </div> </article> </div> <div class="content-container"> <div class="header-container"> <h2> <a href="/index.php/en/prof-dr-stephanie-hansmann-menzemer" rel="bookmark"><span class="field field--name-title field--type-string field--label-hidden">Prof. Dr. Stephanie Hansmann-Menzemer</span> </a> </h2> </div> <div class="field field--name-field-function-1 field--type-string field--label-hidden field__item">Director Research Bridge PAC</div> <div class="field field--name-field-institute field--type-string field--label-hidden field__item">Institute for Physics</div> <div class="field field--name-field-facility field--type-string field--label-hidden field__item">Heidelberg University</div> <div class="field field--name-field-link field--type-link field--label-hidden field__item"><a href="https://www.physi.uni-heidelberg.de/~menzemer/Menzemer/index.php">Stephanie Hansmann-Menzemer</a></div> </div> </div> </article> <article data-history-node-id="122" role="article" about="/en/prof-dr-guido-drexlin" class="node node--type-people-profile node--view-mode-teaser"> <div class="node__content"> <div class="content-container"> <div class="header-container"> <h2> <a href="/en/prof-dr-guido-drexlin" rel="bookmark"><span class="field field--name-title field--type-string field--label-hidden">Prof. Dr. Guido Drexlin</span> </a> </h2> </div> <div class="field field--name-field-institute field--type-string field--label-hidden field__item">Institute for Nuclear Physics </div> <div class="field field--name-field-facility field--type-string field--label-hidden field__item">Karlsruhe Institute of Technology</div> <div class="field field--name-field-link field--type-link field--label-hidden field__item"><a href="http://www.ikp.kit.edu/english/contacts_69.php">Guido Drexlin</a></div> </div> </div> </article> </div> </div> Thu, 30 Aug 2018 12:04:58 +0000 Maria Garcia Hernandez 138 at https://heika-research.de Proof of concept for the MATRIX experiment designed to search for signatures of keV sterile neutrinos in the 3H beta spectrum https://heika-research.de/en/research/particle-physics-astroparticle-physics-and-cosmology-pac/proof-concept-matrix-experiment <span class="field field--name-title field--type-string field--label-hidden">Proof of concept for the MATRIX experiment designed to search for signatures of keV sterile neutrinos in the 3H beta spectrum</span> <span class="field field--name-uid field--type-entity-reference field--label-hidden"><span lang="" about="/en/user/31" typeof="schema:Person" property="schema:name" datatype="" content="Maria Garcia Hernandez">Maria Garcia H…</span></span> <span class="field field--name-created field--type-created field--label-hidden">Thu, 08/30/2018 - 14:12</span> <div class="clearfix text-formatted field field--name-field-summary field--type-text-long field--label-hidden field__item"><p>The Microcalorimeter Arrays for a TRItium eXperiment, MATRIX is one of the core projects within the “Explore Dark Matter” proposal. This experiment has been conceived to search for a tiny kink in a high statistics and high energy resolution 3H spectrum calorimetrically meas-ured which can be related to the existence of keV sterile neutrinos mixing with active neutri-nos. Large arrays of low temperature metallic magnetic alorimeters, where each detector has a 3H activity of the order of 10 Bq enclosed in the absorber, will be read out using the microwave SQUID multiplexing technique. High statistics and high energy resolution measurements of the 3H spectrum present two main challenges: first is to demonstrate that 3H loaded detectors can achieve good performance in terms of energy resolution and time resolution, second is to provide a multiplexed readout scheme able to allocate enough bandwidth per channel and with a reduced additional noise. We propose to perform proof of concept experiments, able to set the basis for the development of the large scale experiment. Our aim is to characterize MMC with 3H enclosed in the absorber and determine the achievable performance and to develop an innovative RF multistage mixer board which offers noise optimized signal conditioning and coarse hannelization. A further activity is the development of a concept for a scalable and flexible data acquisition system as a backend for detector electronics of the MATRIX experiment. </p></div> <div class="field field--name-field-research-bridges field--type-entity-reference field--label-above"> <div class="field__label">Research bridges</div> <div class="field__items"> <div class="field__item"><a href="/en/research/particle-physics-astroparticle-physics-and-cosmology-pac" hreflang="en">Particle Physics, Astroparticle Physics and Cosmology (PAC)</a></div> </div> </div> <div class="field field--name-field-start-date field--type-datetime field--label-above"> <div class="field__label">Start date</div> <div class="field__item"> <time datetime="2018-01-01T12:00:00Z" class="datetime">01/01/2018</time> </div> </div> <div class="field field--name-field-end-date field--type-datetime field--label-hidden field__item"><time datetime="2018-12-31T12:00:00Z" class="datetime">12/31/2018</time> </div> <div class="field field--name-field-contact-person field--type-entity-reference field--label-above"> <div class="field__label"><h3>Project management</h3></div> <div class="field__items"> <article data-history-node-id="123" role="article" about="/en/jprof-dr-loredana-gastaldo" class="node node--type-people-profile node--view-mode-teaser"> <div class="node__content"> <div class="content-container"> <div class="header-container"> <h2> <a href="/en/jprof-dr-loredana-gastaldo" rel="bookmark"><span class="field field--name-title field--type-string field--label-hidden">JProf. Dr. Loredana Gastaldo</span> </a> </h2> </div> <div class="field field--name-field-institute field--type-string field--label-hidden field__item">Kirchhoff-Institute for Physics</div> <div class="field field--name-field-facility field--type-string field--label-hidden field__item">University of Heidelberg</div> <div class="field field--name-field-link field--type-link field--label-hidden field__item"><a href="https://www.kip.uni-heidelberg.de/people/gruppe.php?action=details&amp;num=1066">Loredana Gastaldo</a></div> </div> </div> </article> <article data-history-node-id="124" role="article" about="/en/dr-oliver-sander" class="node node--type-people-profile node--view-mode-teaser"> <div class="node__content"> <div class="content-container"> <div class="header-container"> <h2> <a href="/en/dr-oliver-sander" rel="bookmark"><span class="field field--name-title field--type-string field--label-hidden">Dr. Oliver Sander</span> </a> </h2> </div> <div class="field field--name-field-institute field--type-string field--label-hidden field__item">Institute for Data Processing and Electronics</div> <div class="field field--name-field-facility field--type-string field--label-hidden field__item">Karlsruhe Institute of Technology</div> <div class="field field--name-field-link field--type-link field--label-hidden field__item"><a href="http://www.ipe.kit.edu/english/754_2337.php">Oliver Sander</a></div> </div> </div> </article> </div> </div> Thu, 30 Aug 2018 12:12:57 +0000 Maria Garcia Hernandez 139 at https://heika-research.de A novel dark matter signal at the LHC: di-Higgs plus missing energy https://heika-research.de/en/research/particle-physics-astroparticle-physics-and-cosmology-pac/novel-dark-matter-signal-lhc-di <span class="field field--name-title field--type-string field--label-hidden">A novel dark matter signal at the LHC: di-Higgs plus missing energy</span> <span class="field field--name-uid field--type-entity-reference field--label-hidden"><span lang="" about="/en/user/31" typeof="schema:Person" property="schema:name" datatype="" content="Maria Garcia Hernandez">Maria Garcia H…</span></span> <span class="field field--name-created field--type-created field--label-hidden">Tue, 09/25/2018 - 14:30</span> <div class="clearfix text-formatted field field--name-field-summary field--type-text-long field--label-hidden field__item"><p><span><span><span><span><span><span><span lang="EN-US" xml:lang="EN-US" xml:lang="EN-US"><span><span>Summary</span></span></span></span></span></span></span></span></span></p> <p><span><span><span><span><span><span><span lang="EN-US" xml:lang="EN-US" xml:lang="EN-US"><span>Besides the visible matter that surrounds us and that we are made of, astrophysics observations point to another form of matter we call dark matter. If dark matter is made of new particles, it can be produced under laboratory conditions at particle colliders. Due to their weak interactions with visible matter, however, dark matter particles escape the detectors. Yet they can be observed indirectly as missing energy through the momentum imbalance of visible particles from the same process.</span></span></span></span></span></span></span></span></p> <p><span><span><span><span><span><span><span lang="EN-US" xml:lang="EN-US" xml:lang="EN-US"><span>In this project, we explore the production of two Higgs bosons and missing energy as a novel signature at the Large Hadron Collider (LHC). Such a signal is expected in models where dark matter interacts with visible matter mainly through the Higgs boson. We have identified two classes of models that predict a di-Higgs dark matter signature, while being in agreement with previous searches and astrophysical observations.</span></span></span></span></span></span></span></span></p> <p><span><span><span><span><span><span><span lang="EN-US" xml:lang="EN-US" xml:lang="EN-US"><span>The detection of two Higgs bosons and missing energy at the LHC is complicated by other processes that fake our signal. For instance, the production of two top-quarks decaying into invisible neutrinos and visible particles can look very similar to dark matter production. Using modern analysis tools for collider observables, we have investigated how to best distinguish our signal from such background processes. Kinematic features, such as the amount of missing energy or the distributions of the Higgs boson decay products, allow us to interpret the observed collision patterns in terms of our dark matter models.</span></span></span></span></span></span></span></span></p> <p><span><span><span><span><span><span><span lang="EN-US" xml:lang="EN-US" xml:lang="EN-US"><span>We find that di-Higgs production plus missing energy is indeed a promising new signature at the LHC. Since the signal process is rare, the experimental prospects to observe dark matter will improve significantly with the large amount of data collected during the coming years.</span></span></span></span></span></span></span></span></p></div> <div class="field field--name-field-research-bridges field--type-entity-reference field--label-above"> <div class="field__label">Research bridges</div> <div class="field__items"> <div class="field__item"><a href="/en/research/particle-physics-astroparticle-physics-and-cosmology-pac" hreflang="en">Particle Physics, Astroparticle Physics and Cosmology (PAC)</a></div> </div> </div> <div class="field field--name-field-start-date field--type-datetime field--label-above"> <div class="field__label">Start date</div> <div class="field__item"> <time datetime="2017-04-01T12:00:00Z" class="datetime">04/01/2017</time> </div> </div> <div class="field field--name-field-contact-person field--type-entity-reference field--label-above"> <div class="field__label"><h3>Project management</h3></div> <div class="field__items"> <article data-history-node-id="146" role="article" about="/en/jun-prof-dr-susanne-westhoff" class="node node--type-people-profile node--view-mode-teaser"> <div class="node__content"> <div class="content-container"> <div class="header-container"> <h2> <a href="/en/jun-prof-dr-susanne-westhoff" rel="bookmark"><span class="field field--name-title field--type-string field--label-hidden">Jun.-Prof. Dr. Susanne Westhoff</span> </a> </h2> </div> <div class="field field--name-field-institute field--type-string field--label-hidden field__item">Institute for Theoretical Physics</div> <div class="field field--name-field-facility field--type-string field--label-hidden field__item">Heidelberg University</div> <div class="field field--name-field-link field--type-link field--label-hidden field__item"><a href="http://www.thphys.uni-heidelberg.de/~westhoff/">Susanne Westhoff</a></div> </div> </div> </article> <article data-history-node-id="147" role="article" about="/en/dr-jose-zurita" class="node node--type-people-profile node--view-mode-teaser"> <div class="node__content"> <div class="content-container"> <div class="header-container"> <h2> <a href="/en/dr-jose-zurita" rel="bookmark"><span class="field field--name-title field--type-string field--label-hidden">Dr. Jose Zurita</span> </a> </h2> </div> <div class="field field--name-field-institute field--type-string field--label-hidden field__item">Institute for Nuclear Physics</div> <div class="field field--name-field-facility field--type-string field--label-hidden field__item">Karlsruhe Institute of Technology</div> </div> </div> </article> </div> </div> Tue, 25 Sep 2018 12:30:21 +0000 Maria Garcia Hernandez 167 at https://heika-research.de Exploring the Dark Sector with B Decays https://heika-research.de/en/research/particle-physics-astroparticle-physics-and-cosmology-pac/exploring-dark-sector-b-decays <span class="field field--name-title field--type-string field--label-hidden">Exploring the Dark Sector with B Decays</span> <span class="field field--name-uid field--type-entity-reference field--label-hidden"><span lang="" about="/en/user/31" typeof="schema:Person" property="schema:name" datatype="" content="Maria Garcia Hernandez">Maria Garcia H…</span></span> <span class="field field--name-created field--type-created field--label-hidden">Tue, 09/25/2018 - 14:37</span> <div class="clearfix text-formatted field field--name-field-summary field--type-text-long field--label-hidden field__item"><p>Es sollen experimentelle Suchen nach den Zerfällen B→ e νs und B→ μ νs , wobei νs ein massives steriles Neutrino bezeichnet, mit Daten des Belle-Experiments durchgeführt werden. Zudem soll mit simulierten Monte-Carlo-Daten eine explorative Studie zum Zerfall B→ τ νs durchgeführt werden, um eine Messung bei Belle II vorzubereiten. Diese Vorhaben sollen durch theoretische Arbeiten ergänzt werden: Dabei geht es einerseits um die mögliche Rolle von sterilen Neutrinos als Bestandteil der Dunklen Materie oder „Messenger-Teilchen“, das Wechselwirkungen zwischen dunkler und sichtbarer Materie vermittelt. Andererseits soll der Zusammenhang zur Anomalie in b→c τ ν -Zerfällen, deren gemessene Verzweigungsverhältnisse im Widerspruch zum Standardmodell stehen, beleuchtet werden.</p></div> <div class="field field--name-field-research-bridges field--type-entity-reference field--label-above"> <div class="field__label">Research bridges</div> <div class="field__items"> <div class="field__item"><a href="/en/research/particle-physics-astroparticle-physics-and-cosmology-pac" hreflang="en">Particle Physics, Astroparticle Physics and Cosmology (PAC)</a></div> </div> </div> <div class="field field--name-field-start-date field--type-datetime field--label-above"> <div class="field__label">Start date</div> <div class="field__item"> <time datetime="2017-04-01T12:00:00Z" class="datetime">04/01/2017</time> </div> </div> <div class="field field--name-field-contact-person field--type-entity-reference field--label-above"> <div class="field__label"><h3>Project management</h3></div> <div class="field__items"> <article data-history-node-id="149" role="article" about="/en/dr-martin-bauer" class="node node--type-people-profile node--view-mode-teaser"> <div class="node__content"> <div class="content-container"> <div class="header-container"> <h2> <a href="/en/dr-martin-bauer" rel="bookmark"><span class="field field--name-title field--type-string field--label-hidden">Dr. Martin Bauer</span> </a> </h2> </div> <div class="field field--name-field-institute field--type-string field--label-hidden field__item">Institute for Theoretical Physics</div> <div class="field field--name-field-facility field--type-string field--label-hidden field__item">Heidelberg University</div> <div class="field field--name-field-link field--type-link field--label-hidden field__item"><a href="http://www.thphys.uni-heidelberg.de/~bauer/">Martin Bauer</a></div> </div> </div> </article> <article data-history-node-id="148" role="article" about="/en/prof-dr-ulrich-nierste" class="node node--type-people-profile node--view-mode-teaser"> <div class="node__content"> <div class="content-container"> <div class="header-container"> <h2> <a href="/en/prof-dr-ulrich-nierste" rel="bookmark"><span class="field field--name-title field--type-string field--label-hidden">Prof. Dr. Ulrich Nierste</span> </a> </h2> </div> <div class="field field--name-field-institute field--type-string field--label-hidden field__item">Institute for Theoretical Particle Physics </div> <div class="field field--name-field-facility field--type-string field--label-hidden field__item">Karlsruhe Institute of Technology</div> <div class="field field--name-field-link field--type-link field--label-hidden field__item"><a href="https://www.kceta.kit.edu/english/21_46.php">Ulrich Nierste</a></div> </div> </div> </article> </div> </div> Tue, 25 Sep 2018 12:37:45 +0000 Maria Garcia Hernandez 168 at https://heika-research.de Workshop „Flavour and Dark Matter” https://heika-research.de/en/research/particle-physics-astroparticle-physics-and-cosmology-pac/workshop-flavour-and-dark-matter <span class="field field--name-title field--type-string field--label-hidden">Workshop „Flavour and Dark Matter”</span> <span class="field field--name-uid field--type-entity-reference field--label-hidden"><span lang="" about="/en/user/31" typeof="schema:Person" property="schema:name" datatype="" content="Maria Garcia Hernandez">Maria Garcia H…</span></span> <span class="field field--name-created field--type-created field--label-hidden">Tue, 09/25/2018 - 14:40</span> <div class="clearfix text-formatted field field--name-field-summary field--type-text-long field--label-hidden field__item"><p><span><span><span><span lang="EN-US" xml:lang="EN-US" xml:lang="EN-US"><span><span><span>Precision experiments in Flavour physics can probe the interaction between the known particles described by the established Standard Model of Elementary Particles and the mysterious Dark Matter, which dominates over the visible matter in the Universe. KIT and Universität Heidelberg participate in the international flavour experiments </span></span></span></span><span><span><span><span><span>Belle (and Belle II), LHCb, and mu3e and perform related theoretical research as well. The international three-day HEiKA workshop has brought together 71 researchers from 23 academic institutions in 9 countries. The 28 talks covered the topical areas (a) </span></span></span></span></span><span><span><span><span>sterile neutrinos in decays of leptons and mesons, (b) </span></span></span></span><span><span><span>axion-like particles, (c) dark photons and Z' models, and (d) flavoured theories of the dark sector. A half-day excursion was devoted to a visit of the KATRIN experiment and the </span></span></span>Tritium Laboratory Karlsruhe located at Campus North of KIT. </span></span></span></p></div> <div class="field field--name-field-research-bridges field--type-entity-reference field--label-above"> <div class="field__label">Research bridges</div> <div class="field__items"> <div class="field__item"><a href="/en/research/particle-physics-astroparticle-physics-and-cosmology-pac" hreflang="en">Particle Physics, Astroparticle Physics and Cosmology (PAC)</a></div> </div> </div> <div class="field field--name-field-start-date field--type-datetime field--label-above"> <div class="field__label">Start date</div> <div class="field__item"> <time datetime="2017-04-01T12:00:00Z" class="datetime">04/01/2017</time> </div> </div> <div class="field field--name-field-end-date field--type-datetime field--label-hidden field__item"><time datetime="2017-12-31T12:00:00Z" class="datetime">12/31/2017</time> </div> <div class="field field--name-field-contact-person field--type-entity-reference field--label-above"> <div class="field__label"><h3>Project management</h3></div> <div class="field__items"> <article data-history-node-id="94" role="article" about="/index.php/en/prof-dr-stephanie-hansmann-menzemer" class="node node--type-people-profile node--view-mode-teaser"> <div class="node__content"> <div class="field field--name-field-profile-picture field--type-entity-reference field--label-hidden field__item"><article class="media media--type-image media--view-mode-portrait-image"> <div class="field field--name-field-media-image field--type-image field--label-hidden field__item"> <picture> <!--[if IE 9]><video style="display: none;"><![endif]--> <source srcset="/sites/default/files/styles/portrait_1x_tablet/public/2018-08/BD_member_SHansmannMenzemer.jpg?h=b374aae6&amp;itok=Uvs9PesD 1x, /sites/default/files/styles/portrait_2x_tablet/public/2018-08/BD_member_SHansmannMenzemer.jpg?h=b374aae6&amp;itok=x6QTy6-G 2x" media="all and (min-width: 769px)" type="image/jpeg"/> <source srcset="/sites/default/files/styles/portrait_1x_tablet/public/2018-08/BD_member_SHansmannMenzemer.jpg?h=b374aae6&amp;itok=Uvs9PesD 1x, /sites/default/files/styles/portrait_2x_tablet/public/2018-08/BD_member_SHansmannMenzemer.jpg?h=b374aae6&amp;itok=x6QTy6-G 2x" media="all and (min-width: 481px) and (max-width: 768px)" type="image/jpeg"/> <source srcset="/sites/default/files/styles/portrait_1x_phone/public/2018-08/BD_member_SHansmannMenzemer.jpg?h=b374aae6&amp;itok=Q5VKvDYw 1x, /sites/default/files/styles/portrait_1x_tablet/public/2018-08/BD_member_SHansmannMenzemer.jpg?h=b374aae6&amp;itok=Uvs9PesD 2x" media="all and (max-width: 480px)" type="image/jpeg"/> <!--[if IE 9]></video><![endif]--> <img src="/sites/default/files/styles/portrait_1x_tablet/public/2018-08/BD_member_SHansmannMenzemer.jpg?h=b374aae6&amp;itok=Uvs9PesD" alt="Prof. Dr. Stephanie Hansmann-Menzemer" typeof="foaf:Image" /> </picture> </div> </article> </div> <div class="content-container"> <div class="header-container"> <h2> <a href="/index.php/en/prof-dr-stephanie-hansmann-menzemer" rel="bookmark"><span class="field field--name-title field--type-string field--label-hidden">Prof. Dr. Stephanie Hansmann-Menzemer</span> </a> </h2> </div> <div class="field field--name-field-function-1 field--type-string field--label-hidden field__item">Director Research Bridge PAC</div> <div class="field field--name-field-institute field--type-string field--label-hidden field__item">Institute for Physics</div> <div class="field field--name-field-facility field--type-string field--label-hidden field__item">Heidelberg University</div> <div class="field field--name-field-link field--type-link field--label-hidden field__item"><a href="https://www.physi.uni-heidelberg.de/~menzemer/Menzemer/index.php">Stephanie Hansmann-Menzemer</a></div> </div> </div> </article> <article data-history-node-id="148" role="article" about="/en/prof-dr-ulrich-nierste" class="node node--type-people-profile node--view-mode-teaser"> <div class="node__content"> <div class="content-container"> <div class="header-container"> <h2> <a href="/en/prof-dr-ulrich-nierste" rel="bookmark"><span class="field field--name-title field--type-string field--label-hidden">Prof. Dr. Ulrich Nierste</span> </a> </h2> </div> <div class="field field--name-field-institute field--type-string field--label-hidden field__item">Institute for Theoretical Particle Physics </div> <div class="field field--name-field-facility field--type-string field--label-hidden field__item">Karlsruhe Institute of Technology</div> <div class="field field--name-field-link field--type-link field--label-hidden field__item"><a href="https://www.kceta.kit.edu/english/21_46.php">Ulrich Nierste</a></div> </div> </div> </article> </div> </div> Tue, 25 Sep 2018 12:40:00 +0000 Maria Garcia Hernandez 169 at https://heika-research.de Prototypentwicklung eines skalierbaren, auf metallischen magnetischen Kalorimetern basierenden Multikanal-Detektorsystems für die Suche nach dunkler Materie https://heika-research.de/en/research/particle-physics-astroparticle-physics-and-cosmology-pac/prototypentwicklung-eines <span class="field field--name-title field--type-string field--label-hidden">Prototypentwicklung eines skalierbaren, auf metallischen magnetischen Kalorimetern basierenden Multikanal-Detektorsystems für die Suche nach dunkler Materie</span> <span class="field field--name-uid field--type-entity-reference field--label-hidden"><span lang="" about="/en/user/31" typeof="schema:Person" property="schema:name" datatype="" content="Maria Garcia Hernandez">Maria Garcia H…</span></span> <span class="field field--name-created field--type-created field--label-hidden">Tue, 09/25/2018 - 14:43</span> <div class="clearfix text-formatted field field--name-field-summary field--type-text-long field--label-hidden field__item"><p><span><span><span>Es hat sich gezeigt, dass auf metallischen magnetischen Kalorimetern (MMCs) basierende Detektorsysteme einige Vorteile gegenüber konventionellen Detektorsystemen bieten. Aus diesem Grund werden in dem geplanten Exzellenzcluster zwischen der Universität Heidelberg, dem Karlsruher Institut für Technologie (KIT) sowie dem Max-Planck-Institut für Kernphysik (MPIK) in Heidelberg auf MMCs basierende Multikanal-Detektorsysteme eine Schlüsseltechnologie für mehrere dedizierte Experimente zur Suche nach Dunkler Materie sein. Die Implementierung dieser Systeme ist allerdings eine technologische Herausforderung, da höchstempfindliche kryogene Detektoren mit schneller Digital- und Analogelektronik kombiniert werden müssen. Im Rahmen dieses Projekts wurde daher ein Prototyp eines MMC-basierten Multikanal-Detektorsystems aufgebaut, mit dessen Hilfe ein verbessertes Verständnis des Zusammenspiels zwischen einer FPGA-basierten Raumtemperaturelektronik mit integrierter analoger HF-Elektronik und eines kryogenen Detektorarrays gewonnen wurden. Dieser Aufbau hat es erlaubt, die Spezifikationen für die Realisierung anwendungsorientierter großer Detektorsysteme abzuleiten. Der implementierte Prototyp ist voll funktionsfähig und wird für Charakterisierungsmessungen verwendet. Zeitnah soll er auch für Anwendungen in der Astroteilchenphysik, speziell der Suche nach dunkler Materie, eingesetzt werden.</span></span></span></p></div> <div class="field field--name-field-research-bridges field--type-entity-reference field--label-above"> <div class="field__label">Research bridges</div> <div class="field__items"> <div class="field__item"><a href="/en/research/particle-physics-astroparticle-physics-and-cosmology-pac" hreflang="en">Particle Physics, Astroparticle Physics and Cosmology (PAC)</a></div> </div> </div> <div class="field field--name-field-start-date field--type-datetime field--label-above"> <div class="field__label">Start date</div> <div class="field__item"> <time datetime="2017-04-01T12:00:00Z" class="datetime">04/01/2017</time> </div> </div> <div class="field field--name-field-contact-person field--type-entity-reference field--label-above"> <div class="field__label"><h3>Project management</h3></div> <div class="field__items"> <article data-history-node-id="150" role="article" about="/en/priv-doz-dr-sebastian-kempf" class="node node--type-people-profile node--view-mode-teaser"> <div class="node__content"> <div class="content-container"> <div class="header-container"> <h2> <a href="/en/priv-doz-dr-sebastian-kempf" rel="bookmark"><span class="field field--name-title field--type-string field--label-hidden">Priv.-Doz. Dr. Sebastian Kempf</span> </a> </h2> </div> <div class="field field--name-field-institute field--type-string field--label-hidden field__item">Kirchhoff Institute for Physics</div> <div class="field field--name-field-facility field--type-string field--label-hidden field__item">Heidelberg University</div> <div class="field field--name-field-link field--type-link field--label-hidden field__item"><a href="http://www.kip.uni-heidelberg.de/user/skempf/">Sebastian Kempf</a></div> </div> </div> </article> <article data-history-node-id="124" role="article" about="/en/dr-oliver-sander" class="node node--type-people-profile node--view-mode-teaser"> <div class="node__content"> <div class="content-container"> <div class="header-container"> <h2> <a href="/en/dr-oliver-sander" rel="bookmark"><span class="field field--name-title field--type-string field--label-hidden">Dr. Oliver Sander</span> </a> </h2> </div> <div class="field field--name-field-institute field--type-string field--label-hidden field__item">Institute for Data Processing and Electronics</div> <div class="field field--name-field-facility field--type-string field--label-hidden field__item">Karlsruhe Institute of Technology</div> <div class="field field--name-field-link field--type-link field--label-hidden field__item"><a href="http://www.ipe.kit.edu/english/754_2337.php">Oliver Sander</a></div> </div> </div> </article> </div> </div> Tue, 25 Sep 2018 12:43:15 +0000 Maria Garcia Hernandez 170 at https://heika-research.de Dark Matter at the LHC – Analysis and Interpretation https://heika-research.de/en/research/particle-physics-astroparticle-physics-and-cosmology-pac/dark-matter-lhc-analysis-and <span class="field field--name-title field--type-string field--label-hidden">Dark Matter at the LHC – Analysis and Interpretation</span> <span class="field field--name-uid field--type-entity-reference field--label-hidden"><span lang="" about="/en/user/31" typeof="schema:Person" property="schema:name" datatype="" content="Maria Garcia Hernandez">Maria Garcia H…</span></span> <span class="field field--name-created field--type-created field--label-hidden">Tue, 09/25/2018 - 14:45</span> <div class="clearfix text-formatted field field--name-field-summary field--type-text-long field--label-hidden field__item"><p><span><span><span><span lang="EN-US" xml:lang="EN-US" xml:lang="EN-US"><span><span>What is Dark Matter made of? The Large Hadron Collider (LHC) at CERN provides a unique laboratory environment to address this key science question. In this project, we have laid groundwork for a novel method to analyze and interpret LHC data in the quest for Dark Matter. The LHC has, over the past few years, shown spectacular performance and has produced unprecedented large data samples of high-energy proton-proton collisions. The large multi-purpose experiments conducted by the ATLAS and CMS collaborations have searched through this data to find any hint of the production of Dark Matter candidate particles. None have been found and therefore many prominent physics models with predictions for Dark Matter candidates can be ruled out. The ATLAS and CMS collaborations have published these results independently.</span></span></span></span></span></span></p> <p><span><span><span><span lang="EN-US" xml:lang="EN-US" xml:lang="EN-US"><span><span>This HEiKA project has explored the possibility to combine results of the ATLAS and CMS data samples. The immediate benefit of this is that the size of the data sample is effectively doubled. However, the ATLAS and CMS detectors are very different, with different efficiencies and acceptances for a given type of events. In order to combine the data from the two detectors, the ATLAS group at Heidelberg University and the CMS group at KIT first unfolded the data to correct for all detector effects. For this study, both groups selected collision events with large missing transverse energy (which is the experimental signature for a Dark Matter particle leaving the detector) and energetic jets. One of the major challenges we faced was how to present the systematic uncertainties in a consistent way between the two experiments and whether or not to treat these systematic uncertainties as correlated between the experiments. </span></span></span></span></span></span></p> <p><span><span><span><span lang="EN-US" xml:lang="EN-US" xml:lang="EN-US"><span><span>The theory group at Heidelberg explored how experimental searches for Dark Matter could be better optimized. They specifically focused on the challenging signature of Higgs boson decays to invisible particles. In close collaboration with the experimental groups from Heidelberg and KIT, they studied multivariate methods to enhance the signal in this process. The ultimate goal is to incorporate the results from these detector-corrected experimental searches into the global Higgs-boson analysis framework, SFitter, which is developed in part by the theory group at Heidelberg.</span></span></span></span></span></span></p></div> <div class="field field--name-field-research-bridges field--type-entity-reference field--label-above"> <div class="field__label">Research bridges</div> <div class="field__items"> <div class="field__item"><a href="/en/research/particle-physics-astroparticle-physics-and-cosmology-pac" hreflang="en">Particle Physics, Astroparticle Physics and Cosmology (PAC)</a></div> </div> </div> <div class="field field--name-field-start-date field--type-datetime field--label-above"> <div class="field__label">Start date</div> <div class="field__item"> <time datetime="2017-04-01T12:00:00Z" class="datetime">04/01/2017</time> </div> </div> <div class="field field--name-field-contact-person field--type-entity-reference field--label-above"> <div class="field__label"><h3>Project management</h3></div> <div class="field__items"> <article data-history-node-id="159" role="article" about="/en/dr-monica-dunford" class="node node--type-people-profile node--view-mode-teaser"> <div class="node__content"> <div class="content-container"> <div class="header-container"> <h2> <a href="/en/dr-monica-dunford" rel="bookmark"><span class="field field--name-title field--type-string field--label-hidden">Dr. Monica Dunford</span> </a> </h2> </div> <div class="field field--name-field-institute field--type-string field--label-hidden field__item">Kirchhoff Institute for Physics</div> <div class="field field--name-field-facility field--type-string field--label-hidden field__item">Heidelberg University</div> <div class="field field--name-field-link field--type-link field--label-hidden field__item"><a href="https://www.kip.uni-heidelberg.de/people/gruppe.php?action=details&amp;num=8094">Monica Dunford</a></div> </div> </div> </article> <article data-history-node-id="160" role="article" about="/en/prof-dr-ulrich-husemann" class="node node--type-people-profile node--view-mode-teaser"> <div class="node__content"> <div class="content-container"> <div class="header-container"> <h2> <a href="/en/prof-dr-ulrich-husemann" rel="bookmark"><span class="field field--name-title field--type-string field--label-hidden">Prof. Dr. Ulrich Husemann</span> </a> </h2> </div> <div class="field field--name-field-institute field--type-string field--label-hidden field__item">Institute of Experimental Particle Physics</div> <div class="field field--name-field-facility field--type-string field--label-hidden field__item">Karlsruhe Institute of Technology</div> <div class="field field--name-field-link field--type-link field--label-hidden field__item"><a href="http://ekpwww.etp.kit.edu/~husemann/home.html">Ulrich Husemann</a></div> </div> </div> </article> </div> </div> Tue, 25 Sep 2018 12:45:15 +0000 Maria Garcia Hernandez 171 at https://heika-research.de Searching for Dark Matter particle signatures with salt minerals as Palaeo-Detectors https://heika-research.de/en/research/particle-physics-astroparticle-physics-and-cosmology-pac/searching-dark-matter-particle <span class="field field--name-title field--type-string field--label-hidden">Searching for Dark Matter particle signatures with salt minerals as Palaeo-Detectors</span> <span class="field field--name-uid field--type-entity-reference field--label-hidden"><span lang="" about="/en/user/32" typeof="schema:Person" property="schema:name" datatype="">Regine Kleber</span></span> <span class="field field--name-created field--type-created field--label-hidden">Mon, 11/12/2018 - 17:13</span> <div class="clearfix text-formatted field field--name-field-summary field--type-text-long field--label-hidden field__item"><p><span><span><span><span lang="EN-GB" xml:lang="EN-GB" xml:lang="EN-GB">The gravitational effects of Dark Matter (DM) as part of the Universe are well studied and can be observed on variable astrophysical and cosmological scales. The particle nature of DM is still under debate. Since the 1980´s, weakly interacting massive particles (WIMPs) are favoured as the objects of DM. In 1995, for the first time, it was suggested using ancient micas as a Palaeo-detector material for WIMPs. Recently, a new publication re-evaluated the possibility of minerals such as Halite as a Palaeo-Detector for WIMPs and concluded that this method may be competitive or even surpassing the sensitivity of direct DM search experiments.</span></span></span></span></p> <p><span><span><span><span lang="EN-GB" xml:lang="EN-GB" xml:lang="EN-GB">The goal of the proposed research project is to evaluate the potential of Halite (NaCl), as a Palaeo-Detector for WIMP Dark Matter. The detection principle is the identification of WIMP-induced Sodium and Chlorine ion recoil tracks (WRTs) in Halite stored in deep-underground salt deposits. We chose the Permian (260 Myr) salt deposit Unterbreizbach (Thüringen) where the salt is located at a low temperature at a depth between 400m and more than 1000m since more than 80 Myrs. </span></span></span></span></p> <p><span><span><span><span lang="EN-GB" xml:lang="EN-GB" xml:lang="EN-GB">There are three research aims:</span></span></span></span></p> <p><span><span><span><span lang="EN-GB" xml:lang="EN-GB" xml:lang="EN-GB">1) Numerical simulation of WRT formation in Halite as a consequence of potential WIMP—nucleus scattering processes.</span></span></span></span></p> <p><span><span><span><span lang="EN-GB" xml:lang="EN-GB" xml:lang="EN-GB">2) Visualisation of WRTs in Halite by etching and optical microscopy, SEM, and AFM, and UV-C stimulated fluorescence spectroscopy. Ion-irradiation and annealing experiments will allow defining the annealing temperature of tracks.</span></span></span></span></p> <p><span><span><span><span lang="EN-GB" xml:lang="EN-GB" xml:lang="EN-GB">3) Based on 1) and 2), we plan to derive the discovery and exclusion potential for this DM search method, especially with respect to the discovery potential of direct DM searches.</span></span></span></span></p> <p><span lang="EN-GB" xml:lang="EN-GB" xml:lang="EN-GB"><span><span>The expected outcome is the characterization of Halite as a possible Palaeo-detector for WRTs and a thorough assessment of its sensitivity for WIMP DM detection. We intend to submit a full proposal to DFG for funding an extended DM search with Palaeo-Detectors. </span></span></span></p></div> <div class="field field--name-field-research-bridges field--type-entity-reference field--label-above"> <div class="field__label">Research bridges</div> <div class="field__items"> <div class="field__item"><a href="/en/research/particle-physics-astroparticle-physics-and-cosmology-pac" hreflang="en">Particle Physics, Astroparticle Physics and Cosmology (PAC)</a></div> </div> </div> <div class="field field--name-field-start-date field--type-datetime field--label-above"> <div class="field__label">Start date</div> <div class="field__item"> <time datetime="2019-01-01T12:00:00Z" class="datetime">01/01/2019</time> </div> </div> <div class="field field--name-field-end-date field--type-datetime field--label-hidden field__item"><time datetime="2019-12-31T12:00:00Z" class="datetime">12/31/2019</time> </div> <div class="field field--name-field-contact-person field--type-entity-reference field--label-above"> <div class="field__label"><h3>Project management</h3></div> <div class="field__items"> <article data-history-node-id="199" role="article" about="/en/prof-dr-ulrich-glasmacher" class="node node--type-people-profile node--view-mode-teaser"> <div class="node__content"> <div class="content-container"> <div class="header-container"> <h2> <a href="/en/prof-dr-ulrich-glasmacher" rel="bookmark"><span class="field field--name-title field--type-string field--label-hidden">Prof. Dr. Ulrich A. Glasmacher</span> </a> </h2> </div> <div class="field field--name-field-institute field--type-string field--label-hidden field__item">Institute of Earth Sciences</div> <div class="field field--name-field-facility field--type-string field--label-hidden field__item">Heidelberg University</div> <div class="field field--name-field-link field--type-link field--label-hidden field__item"><a href="http://www.thermo-archaeo.uni-hd.de/index.html">Research Group Glasmacher</a></div> </div> </div> </article> <article data-history-node-id="200" role="article" about="/en/dr-klaus-eitel" class="node node--type-people-profile node--view-mode-teaser"> <div class="node__content"> <div class="content-container"> <div class="header-container"> <h2> <a href="/en/dr-klaus-eitel" rel="bookmark"><span class="field field--name-title field--type-string field--label-hidden">Dr. Klaus Eitel</span> </a> </h2> </div> <div class="field field--name-field-institute field--type-string field--label-hidden field__item">Institute for Nuclear Physics (IKP)</div> <div class="field field--name-field-facility field--type-string field--label-hidden field__item">Karlsruhe Institute of Technolgoy</div> <div class="field field--name-field-link field--type-link field--label-hidden field__item"><a href="https://www.ikp.kit.edu/english/contacts_k-eitel.php">Research Group Eitel</a></div> </div> </div> </article> </div> </div> Mon, 12 Nov 2018 16:13:39 +0000 Regine Kleber 211 at https://heika-research.de What if the Milky Way was a quantum-mechanical object? https://heika-research.de/en/research/particle-physics-astroparticle-physics-and-cosmology-pac/what-if-milky-way-was-quantum <span class="field field--name-title field--type-string field--label-hidden">What if the Milky Way was a quantum-mechanical object?</span> <span class="field field--name-uid field--type-entity-reference field--label-hidden"><span lang="" about="/en/user/32" typeof="schema:Person" property="schema:name" datatype="">Regine Kleber</span></span> <span class="field field--name-created field--type-created field--label-hidden">Mon, 11/12/2018 - 17:15</span> <div class="clearfix text-formatted field field--name-field-summary field--type-text-long field--label-hidden field__item"><p><span lang="EN-GB" xml:lang="EN-GB" xml:lang="EN-GB"><span><span>The formation and evolution of cosmic structures provides a link between the physics of the largest and smallest objects: The formation history and the properties of cosmic structures depend crucially on the elementary properties of dark matter particles and provide a laboratory for properties inaccessible by terrestial experiments. In this research programme we focus on axions and axion-like particles as viable and physically well-motivated dark matter particle candidate, whose dynamics is quantum-mechanical, due to their very large de Broglie-wave length. In particular, our proposal is centered on the formation of self-gravitating, quantum-mechanical systems and their equilibrium properties, as well as their observable signatures. In doing that, we intend to go much beyond the well-known Gross-Pitaevskii-equation, by relaxing on the requirement of perfect coherence and allowing finite temperatures.</span></span></span></p></div> <div class="field field--name-field-research-bridges field--type-entity-reference field--label-above"> <div class="field__label">Research bridges</div> <div class="field__items"> <div class="field__item"><a href="/en/research/particle-physics-astroparticle-physics-and-cosmology-pac" hreflang="en">Particle Physics, Astroparticle Physics and Cosmology (PAC)</a></div> </div> </div> <div class="field field--name-field-start-date field--type-datetime field--label-above"> <div class="field__label">Start date</div> <div class="field__item"> <time datetime="2019-01-01T12:00:00Z" class="datetime">01/01/2019</time> </div> </div> <div class="field field--name-field-end-date field--type-datetime field--label-hidden field__item"><time datetime="2019-12-31T12:00:00Z" class="datetime">12/31/2019</time> </div> <div class="field field--name-field-contact-person field--type-entity-reference field--label-above"> <div class="field__label"><h3>Project management</h3></div> <div class="field__items"> <article data-history-node-id="201" role="article" about="/en/prof-dr-bjorn-malte-schafer" class="node node--type-people-profile node--view-mode-teaser"> <div class="node__content"> <div class="content-container"> <div class="header-container"> <h2> <a href="/en/prof-dr-bjorn-malte-schafer" rel="bookmark"><span class="field field--name-title field--type-string field--label-hidden">Prof. Dr. Björn Malte Schäfer</span> </a> </h2> </div> <div class="field field--name-field-institute field--type-string field--label-hidden field__item">Zentrum für Astronomie</div> <div class="field field--name-field-facility field--type-string field--label-hidden field__item">Heidelberg University</div> <div class="field field--name-field-link field--type-link field--label-hidden field__item"><a href="http://www.ita.uni-heidelberg.de/~spirou/">Research Group Schäfer</a></div> </div> </div> </article> <article data-history-node-id="202" role="article" about="/en/prof-dr-thomas-schwetz-mangold" class="node node--type-people-profile node--view-mode-teaser"> <div class="node__content"> <div class="content-container"> <div class="header-container"> <h2> <a href="/en/prof-dr-thomas-schwetz-mangold" rel="bookmark"><span class="field field--name-title field--type-string field--label-hidden">Prof. Dr. Thomas Schwetz-Mangold</span> </a> </h2> </div> <div class="field field--name-field-institute field--type-string field--label-hidden field__item">Institute for Nuclear Physics (IKP)</div> <div class="field field--name-field-facility field--type-string field--label-hidden field__item">Karlsruhe Institute of Technolgoy</div> <div class="field field--name-field-link field--type-link field--label-hidden field__item"><a href="http://www.ikp.kit.edu/astroparticle_theory/english/index.php">Therethical Astroparticle Physics</a></div> </div> </div> </article> </div> </div> Mon, 12 Nov 2018 16:15:36 +0000 Regine Kleber 212 at https://heika-research.de