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X-WR-CALNAME:LBNL Physics Division Research Progress Meetings
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X-WR-CALDESC:Events for LBNL Physics Division Research Progress Meetings
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DTSTART:20230101T000000
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BEGIN:VEVENT
DTSTART;TZID=UTC:20231205T160000
DTEND;TZID=UTC:20231205T170000
DTSTAMP:20260504T105847
CREATED:20231127T222112Z
LAST-MODIFIED:20231127T222112Z
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SUMMARY:Speaker: Michael Williams (University of Michigan) - Title: Searches for Particle Dark Matter with LZ and TESSERACT
DESCRIPTION:Research Progress Meeting \nDate: December 5\, 2023 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Michael Williams (University of Michigan) \nTitle: Searches for Particle Dark Matter with LZ and TESSERACT\n \nAbstract: The search for particle dark matter is one of the primary challenges in modern physics. Direct detection experiments typically rely on measuring signals produced when dark matter particles recoil off a detector target. In this talk\, I will first discuss the LUX-ZEPLIN (LZ) experiment\, which uses a dual-phase xenon time projection chamber to look for WIMP dark matter that recoils off the xenon nucleus. I will discuss LZ detector construction\, first WIMP search results\, and limits on effective field theory (EFT) searches of dark matter. I will then discuss the search for low-mass dark matter with TESSERACT; this encompasses interactions with two types of novel\, ultra-sensitive detectors – SPICE and HeRALD. Both SPICE and HeRALD use transition edge sensors (TESs) for cryogenic readout\, while using different targets: polar crystals and superfluid helium-4\, respectively. I will describe the development and first measurements of new Iridium-Platinum (IrPt) TESs and the commissioning of the new HeRALD detector at LBNL. \n\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-michael-williams-university-of-michigan-title-searches-for-particle-dark-matter-with-lz-and-tesseract/
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BEGIN:VEVENT
DTSTART;TZID=UTC:20231207T160000
DTEND;TZID=UTC:20231207T170000
DTSTAMP:20260504T105847
CREATED:20231201T191816Z
LAST-MODIFIED:20231201T191816Z
UID:2442-1701964800-1701968400@rpm.physics.lbl.gov
SUMMARY:Speaker: Gerrit Farren (Cambridge) - Title: The Atacama Cosmology Telescope: Probing the large scale structure with ACT DR6 CMB lensing and cross-correlation with unWISE
DESCRIPTION:Research Progress Meeting \nDate: December 7\, 2023 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Gerrit Farren (Cambridge) \nTitle: The Atacama Cosmology Telescope: Probing the large scale structure with ACT DR6 CMB lensing and cross-correlation with unWISE\n \nAbstract: I will present work on probing the large scale structure of the universe using CMB lensing from the upcoming Data Release 6 of the Atacama Cosmology Telescope (ACT) and cross-correlations with galaxies from the unWISE galaxy catalog. My talk will focus on how our highly competitive constraints from CMB lensing cross-correlations can provide insight into the widely discussed “S8/sigma8 tension”. For this purpose I will briefly introduce the high fidelity CMB lensing reconstruction obtained by the ACT Collaboration and results from the analysis of the lensing auto-correlation. I will discuss results from the cross-correlation between ACT CMB lensing and unWISE galaxies\, highlighting improvements to the analysis pipeline compared to previous work on the cross-correlation between Planck CMB lensing and unWISE by some of my collaborators (Krolewski et al. 2021). I will also touch on our recent work to extend such cross-correlation analyses beyond two-point correlations using the first detection of the galaxy-galaxy-CMB lensing bispectrum. \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-gerrit-farren-cambridge-title-the-atacama-cosmology-telescope-probing-the-large-scale-structure-with-act-dr6-cmb-lensing-and-cross-correlation-with-unwise/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20231212T130000
DTEND;TZID=UTC:20231212T140000
DTSTAMP:20260504T105847
CREATED:20231207T173255Z
LAST-MODIFIED:20231207T173307Z
UID:2447-1702386000-1702389600@rpm.physics.lbl.gov
SUMMARY:Speaker: Christina Wang (Cal Tech) - Title: Search for New Physics with CMS and Quantum Sensors
DESCRIPTION:Research Progress Meeting \nDate: December 12\, 2023 \nTime: 1:00- 2:00 pm  \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Christina Wang (Cal Tech) \nTitle: Search for New Physics with CMS and Quantum Sensors\n \nAbstract: \nI will present two new highly complementary approaches to search for physics beyond the Standard Model. The searches are enabled by a first-of-its kind reconstruction technique to search for long-lived particles (LLPs) using the Compact Muon Solenoid (CMS) and by new advances in quantum sensing technology to search for axions. \nI will first discuss a search for physics beyond the Standard Model by searching for LLPs using a novel technique to reconstruct decays of LLPs in the CMS muon detectors. The innovative LLP reconstruction technique has been shown to be sensitive to a broad range of LLP decay modes and to LLP masses below GeV. The search yields competitive sensitivity for proper lifetime from 0.1m to 1000m with the full Run2 dataset recorded at the LHC. \nIn the second part of the talk\, I will discuss searching for axions with a low noise quantum sensor\, SNSPDs (superconducting nanowire single photon detectors). The BREAD (Broadband Reflector Experiment for Axion Detection) experiment searches for axions or dark photons using a parabolic mirror to focus axion-converted photons to the SNSPDs. The SNSPDs allow us to be sensitive to 0.04 – 1 eV axions and dark photons\, due to their sensitivity to 0.04 – 1 eV photons. In this talk\, I will present the progress towards a first stage dark photon pilot experiment with a focus on SNSPD characterization. \n\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-christina-wang-cal-tech-title-search-for-new-physics-with-cms-and-quantum-sensors/
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BEGIN:VEVENT
DTSTART;TZID=UTC:20231214T160000
DTEND;TZID=UTC:20231214T170000
DTSTAMP:20260504T105847
CREATED:20231208T155108Z
LAST-MODIFIED:20231208T155108Z
UID:2451-1702569600-1702573200@rpm.physics.lbl.gov
SUMMARY:Speaker: Deion Fellers (University of Oregon) - Title: FASER’s Search for Dark Photons and Neutrinos
DESCRIPTION:Research Progress Meeting \nDate: December 14\, 2023 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Deion Fellers (University of Oregon) \nTitle: FASER’s Search for Dark Photons and Neutrinos\n \nAbstract: FASER is an experiment at the LHC that is designed to search for light\, weakly-interacting particles produced in the far-forward direction from proton-proton collisions at the ATLAS interaction point (IP1). The detector is positioned 480 m downstream of IP1 and aligned with the beam collision axis\, where particles must traverse LHC magnets and approximately 100 m of rock and concrete before reaching FASER. The novel location of the experiment provides both a low background environment and a high-intensity flux of long-lived particles. This talk will provide an overview of the FASER detector and present our first physics results\, where we used a dataset collected at center-of-mass energy √s =13.6 TeV in 2022\, during LHC Run 3\, to directly observe neutrino interactions at a particle collider experiment for the first time and also to probe previously unconstrained phase space of the dark photon with couplings ϵ∼10−5−10−4 and masses ∼10 MeV – 100 MeV. \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-deion-fellers-university-of-oregon-title-fasers-search-for-dark-photons-and-neutrinos/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20231219T160000
DTEND;TZID=UTC:20231219T170000
DTSTAMP:20260504T105847
CREATED:20231214T175021Z
LAST-MODIFIED:20231214T175021Z
UID:2456-1703001600-1703005200@rpm.physics.lbl.gov
SUMMARY:Speaker: Emily Perry (UCL) - Title: Towards the discovery of galactic dark matter: the LZ experiment and beyond
DESCRIPTION:Research Progress Meeting \nDate: December 19\, 2023 \nTime: 4:00- 5:00 pm  \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Emily Perry (UCL) \nTitle: Towards the discovery of galactic dark matter: the LZ experiment and beyond\n \nAbstract: \nThe discovery of the nature of dark matter is internationally recognised as one of the highest priorities in science. Its discovery would bring forward a new era in physics and astronomy\, simultaneously solving the near 100 year old missing mass problem and delivering the first evidence of physics Beyond the Standard Model (BSM). Dual phase xenon (Xe) time projection chambers (TPCs) have been dominating the search for dark matter for the past 10 years. Now not only targeting WIMPs of mass > 3 GeV/c2\, but due to their scalability and advanced technologies\, boast world leading sensitivity to other BSM-physics and rare or exotic neutrino physics. \nThe LUX ZEPLIN (LZ) dark experiment operates at the Sanford Underground Research Facility in South Dakota and is the most sensitive and largest of all Xe TPCs ever constructed. In its first science run of only 60-livedays the experiment has set the world-leading constraints on the existence of WIMPs down to a mass of 9 GeV/c2. This seminar will highlight some of the key work that has led to this result with focus on some of my specific contributions. Giving an exciting glimpse of what the future holds for LZ\, I will present the innovative work that is being done on the ramp up to the next science results. I will also discuss both the short and long term future of LZ and the path to an historic dark matter discovery. \n\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-emily-perry-ucl-title-towards-the-discovery-of-galactic-dark-matter-the-lz-experiment-and-beyond/
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