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X-WR-CALDESC:Events for LBNL Physics Division Research Progress Meetings
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DTSTART:20240101T000000
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BEGIN:VEVENT
DTSTART;TZID=UTC:20241203T160000
DTEND;TZID=UTC:20241203T170000
DTSTAMP:20260414T105835
CREATED:20241126T225315Z
LAST-MODIFIED:20241126T225316Z
UID:2705-1733241600-1733245200@rpm.physics.lbl.gov
SUMMARY:Speaker: Simon Koch (Oxford) - Title: Measurements with ATLAS\, Measurements of ATLAS: A search for leptoquarks in a final state with two tau leptons\, and material measurements of the ITk Pixel detector
DESCRIPTION:Research Progress Meeting \nDate: December 3\, 2024 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Simon Koch (Oxford) \nTitle: Measurements with ATLAS\, Measurements of ATLAS: A search for leptoquarks in a final state with two tau leptons\, and material measurements of the ITk Pixel detector \nAbstract: The ATLAS detector at the LHC has enjoyed great success so far\, spanning both new discoveries and precision measurements\, and tests of a vast array of theoretical models. This seminar will begin with an introduction to the ATLAS high-mass Drell-Yan di-tau measurement and in particular the search for leptoquarks in this decay channel\, including the analysis design and expected results. The search was originally motivated by hints toward lepton-flavour-universality violating behaviour at LHCb\, and the leptoquark models explored couple the lepton and quark sectors of the standard model via a new vector or scalar boson. This also introduces unique properties and challenges to the analysis\, such as the impact of negative interference with the standard model cross-section. \nThe future should bring an even greater physics reach thanks to the larger datasets that will be made possible by the High-Luminosity LHC and the ATLAS Inner Tracker (ITk) upgrade. The tracking and vertexing performance of the ITk is critical for future analyses\, and hence factors influencing detector performance must be validated so they can be correctly implemented in our Monte-Carlo simulations. One important aspect is the material content of the detector\, which has a substantial impact on b-tagging and vertexing resolution due to multiple scattering and hadronic interactions\, and is generally only verified using detector data post-commissioning. The second part of this seminar will explore a series of testbeam measurements utilising multiple scattering of low-energy positrons to measure 2D maps of the fractional radiation length x/X₀ of detector components to sub-mm resolution during the R&D phase. A measurement of an ITkPix quad module will be presented\, and an outlook will be given on the feasibility of measuring large areas quickly and efficiently with such a technique.\nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/95679892182?pwd=RU5xU2dDRFNabnR1U3pQMklkYWFIdz09 \nMeeting ID: 956 7989 2182 \nPasscode: 169037
URL:https://rpm.physics.lbl.gov/event/speaker-simon-koch-oxford-title-measurements-with-atlas-measurements-of-atlas-a-search-for-leptoquarks-in-a-final-state-with-two-tau-leptons-and-material-measurements-of-the-itk-pixel-detecto/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20241205T160000
DTEND;TZID=UTC:20241205T170000
DTSTAMP:20260414T105835
CREATED:20241126T230305Z
LAST-MODIFIED:20241126T230305Z
UID:2710-1733414400-1733418000@rpm.physics.lbl.gov
SUMMARY:Speaker: Cole Kampa (Northwestern U.) - Title: From Muon CLFV to Collider EFT: Advances in New Physics Searches
DESCRIPTION:Research Progress Meeting \nDate: December 5\, 2024 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Cole Kampa (Northwestern U.) \nTitle: From Muon CLFV to Collider EFT: Advances in New Physics Searches \nAbstract: Mu2e\, the muon-to-electron conversion experiment at Fermilab\, will search for Charged Lepton Flavor Violation (CLFV) – an accidental symmetry forbidden in the Standard Model (SM) of particle physics. Observing CLFV would provide unambiguous evidence of New Physics (NP) beyond the SM. I will briefly outline the experimental design and methodology of Mu2e\, emphasizing ongoing efforts to ensure robust physics results. Notably\, the introduction of an unbinned maximum likelihood fit has improved the expected sensitivity to Rμe\, the muon-to-electron conversion rate\, by up to 20%. On the apparatus side\, a key component of the experiment is the tracking detector\, which reconstructs electron trajectories in a uniform magnetic field. Studies of numerical calculations of the field suggest the calculations should predict the field with 1e-3 level accuracy. However\, a 1e-4 level accuracy is required to distinguish signal electrons from the dominant muon decay-in-orbit (DIO) background. To meet this challenge\, a custom field mapping apparatus is being developed. The measured field data will be modeled using a novel approach that combines least-squares fitting with a scalar physics-informed neural network (PINN)\, achieving a modeling fidelity significantly better than the 1e-4 accuracy requirement. I will conclude the CLFV discussion with an overview of two next-generation experiments: Mu2e-II and the Advanced Muon Facility (AMF). \n\nThe energy frontier offers a complementary path to NP discovery. Although direct searches at the Large Hadron Collider (LHC) have yet to yield definitive signs of NP\, many efforts now focus on model agnostic approaches such as Effective Field Theory (EFT). Recently\, the Compact Muon Solenoid (CMS) collaboration observed SM triboson (VVV) production. Building on this milestone\, an ongoing CMS analysis employs an EFT framework to constrain heavy NP given the observed rate of VVV. I will conclude by discussing the statistical combination of the various final states being explored in this analysis.\nJoin Zoom Meeting \nhttps://lbnl.zoom.us/j/98854322464?pwd=K2tKUm1VZjRlV1J5RHE3cXdHQzRxdz09\n\nMeeting ID: 988 5432 2464\n\nPasscode: 142239
URL:https://rpm.physics.lbl.gov/event/speaker-cole-kampa-northwestern-u-title-from-muon-clfv-to-collider-eft-advances-in-new-physics-searches/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20241210T160000
DTEND;TZID=UTC:20241210T170000
DTSTAMP:20260414T105835
CREATED:20241205T174636Z
LAST-MODIFIED:20241205T174636Z
UID:2716-1733846400-1733850000@rpm.physics.lbl.gov
SUMMARY:Speaker: Tyler Horoho (U. of Virginia) - Title: Searching for sub-GeV Dark Matter with the NOvA Near Detector and Measuring the Performance of the Mu2e Cosmic Ray Veto
DESCRIPTION:Research Progress Meeting \nDate: December 10\, 2024 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Tyler Horoho (U. of Virginia) \nTitle: Searching for sub-GeV Dark Matter with the NOvA Near Detector and Measuring the Performance of the Mu2e Cosmic Ray Veto \nAbstract: The constituents of dark matter are still unknown\, and the viable possibilities span a very large mass range. Specific scenarios for the origin of dark matter sharpen the focus to within about an MeV to 100 TeV. Most of the stable constituents of known matter have masses in this lower range\, and a thermal origin for dark matter works in a simple and predictive manner. If there is a non-gravitational interaction between dark matter and ordinary matter\, as there must be in the case of a thermal origin\, then there is necessarily a production mechanism in accelerator-based experiments. NOvA is a high luminosity long-baseline neutrino oscillation experiment at Fermilab that is capable of searching for signatures of dark matter re-scattering with electrons in its near detector after production in the NuMI target. In this talk\, I present an analysis to search for an excess of single electron events in the NOvA near detector consistent with the presence of dark matter-electron scattering and show the expected sensitivity of NOvA to sub-GeV dark matter. I will also discuss a future search for sub-GeV dark matter with the Light Dark Matter eXperiment (LDMX)\, a planned electron-beam fixed-target missing-momentum search for dark matter at SLAC.\nThe Mu2e experiment at Fermilab will search for charged-lepton flavor violation through the neutrino-less conversion of a muon to an electron in the presence of a nucleus\, a sensitive probe for new physics. Mu2e aims to have single-event sensitivity four orders of magnitude beyond current experimental limits. This sensitivity will require less than one expected background event\, which will only be possible with sufficient background vetoing. The largest source of background comes from cosmic-rays\, which can produce electrons indistinguishable from a conversion electron signature. To mitigate this\, Mu2e will use a cosmic ray veto (CRV)\, which must exceed a veto efficiency of 99.99% to meet Mu2e’s sensitivity goals. I will present performance studies on the CRV detector components. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/95679892182?pwd=RU5xU2dDRFNabnR1U3pQMklkYWFIdz09 \nMeeting ID: 956 7989 2182 \nPasscode: 169037
URL:https://rpm.physics.lbl.gov/event/speaker-tyler-horoho-u-of-virginia-title-searching-for-sub-gev-dark-matter-with-the-nova-near-detector-and-measuring-the-performance-of-the-mu2e-cosmic-ray-veto/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20241212T160000
DTEND;TZID=UTC:20241212T170000
DTSTAMP:20260414T105835
CREATED:20241206T195819Z
LAST-MODIFIED:20241209T164652Z
UID:2719-1734019200-1734022800@rpm.physics.lbl.gov
SUMMARY:Speaker: Shion Kubota (Harvard) - Title: Studying neutrinos in high definition with LAr
DESCRIPTION:Research Progress Meeting \nDate: December 12\, 2024 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Shion Kubota (Harvard) \nTitle: Studying neutrinos in high definition with LAr \nAbstract: This talk explores recent advancements in neutrino physics\, with a focus on innovative detector technologies developed for the Deep Underground Neutrino Experiment (DUNE). It delves into the use of Liquid Argon Time Projection Chambers (LArTPCs)\, discussing the challenges associated with the Anode Plane Assembly’s (APA) quality control and how the Digital Wire Analyzer (DWA) has improved the efficiency of wire tension testing. Additionally\, the presentation introduces the Q-Pix readout architecture\, a promising approach to pixelated detection that streamlines data handling and enhances studies of supernova neutrinos. Simulation results highlight Q-Pix’s potential to improve event reconstruction\, extend detection capabilities\, and reduce data demands\, offering exciting possibilities for future kiloton-scale neutrino experiments. \nJoin Zoom Meeting \nhttps://lbnl.zoom.us/j/98854322464?pwd=K2tKUm1VZjRlV1J5RHE3cXdHQzRxdz09\n\nMeeting ID: 988 5432 2464\n\nPasscode: 142239
URL:https://rpm.physics.lbl.gov/event/speaker-shon-kubota-harvard-title-studying-neutrinos-in-high-definition-with-lar/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20241217T160000
DTEND;TZID=UTC:20241217T170000
DTSTAMP:20260414T105835
CREATED:20241212T221438Z
LAST-MODIFIED:20241212T221438Z
UID:2723-1734451200-1734454800@rpm.physics.lbl.gov
SUMMARY:Speaker: Sparshita Dey (Oxford) - Title: Chasing Shadows: Illuminating the Path from LZ to the Next Generation Dual-Phase Xe TPC Observatory for Dark Matter
DESCRIPTION:Research Progress Meeting \nDate: December 17\, 2024 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Sparshita Dey (Oxford) \nTitle: Chasing Shadows: Illuminating the Path from LZ to the Next Generation Dual-Phase Xe TPC Observatory for Dark Matter \nAbstract: The nature of dark matter remains one of the most significant unsolved challenges in modern physics. Liquid xenon time projection chambers (LXe-TPCs) have emerged as a powerful tool in the search for WIMP dark matter candidates (Weakly Interacting Massive Particles)\, particularly in the GeV/c2 range. The XENON-LUX-ZEPLIN-DARWIN (XLZD) collaboration embodies the collective knowledge & expertise of generations of LXe-TPC-based experiments\, combining three current world-leading experimental and R&D efforts operating at sub-10-tonne Xe target masses. This talk will present the case for XLZD’s next-generation dual phase xenon observatory for dark matter and neutrino physics\, with the capability to explore the WIMP parameter space down to the so-called neutrino fog\, a background-limited region where neutrino and WIMP signatures look very similar. A discussion of the lessons learned from the operation & analysis chain for the LUX-ZEPLIN experiment will feature\, to motivate the design approach for this detector\, as well as an overview of novel detector design concepts and exciting current R&D experiments which may both improve sensitivities to low-mass dark matter models and revolutionise the current dark matter direct detection landscape. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/95679892182?pwd=RU5xU2dDRFNabnR1U3pQMklkYWFIdz09 \nMeeting ID: 956 7989 2182 \nPasscode: 169037
URL:https://rpm.physics.lbl.gov/event/speaker-sparshita-dey-oxford-title-chasing-shadows-illuminating-the-path-from-lz-to-the-next-generation-dual-phase-xe-tpc-observatory-for-dark-matter/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20241219T160000
DTEND;TZID=UTC:20241219T170000
DTSTAMP:20260414T105835
CREATED:20241213T215629Z
LAST-MODIFIED:20241213T215629Z
UID:2727-1734624000-1734627600@rpm.physics.lbl.gov
SUMMARY:Speaker: Ryan Gibbons (UC Berkeley) - Title: Searching for Dark Matter with LZ and Future LZ Upgrades
DESCRIPTION:Research Progress Meeting \nDate: December 19\, 2024 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Ryan Gibbons (UC Berkeley) \nTitle: Searching for Dark Matter with LZ and Future LZ Upgrades \nAbstract: Direct detection of particle dark matter remains an outstanding opportunity in understanding the nature of the universe\, and for discovery of physics beyond the Standard Model. I will discuss the LUX-ZEPLIN (LZ) experiment’s world-leading WIMP dark matter searches as well as a novel search for neutrinoless double beta decay. In addition\, I will present three avenues of instrumentation work at LBNL for potential upgrades to the LZ experiment: a solid xenon TPC (crystaLiZe)\, light element doping of xenon (HydroX)\, and mitigation of instrument backgrounds to enable sub-GeV dark matter searches. \nJoin Zoom Meeting \nhttps://lbnl.zoom.us/j/98854322464?pwd=K2tKUm1VZjRlV1J5RHE3cXdHQzRxdz09\n\nMeeting ID: 988 5432 2464\n\nPasscode: 142239
URL:https://rpm.physics.lbl.gov/event/speaker-ryan-gibbons-uc-berkeley-title-searching-for-dark-matter-with-lz-and-future-lz-upgrades/
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