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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:20241105T160000
DTEND;TZID=UTC:20241105T170000
DTSTAMP:20260414T105229
CREATED:20241021T221658Z
LAST-MODIFIED:20241021T221658Z
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SUMMARY:Speaker: Elisabetta Manca (UCLA) - Title: High-precision measurement of the W boson mass at CMS
DESCRIPTION:Research Progress Meeting \nDate: November 5\, 2024 \nTime: 4:00- 5:00 pm  \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Elisabetta Manca (UCLA) \nTitle: High-precision measurement of the W boson mass at CMS \nAbstract: The W boson mass is measured using proton-proton collision data at corresponding to an integrated luminosity of 16.8 inverse fb recorded during 2016 by the CMS experiment. The W boson mass is obtained from a fit of the two-dimensional pT-η distribution in a sample of W→μν decays\, categorized by charge\, yielding one of the most precise measurements of the W mass to date.\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-elisabetta-manca-ucla-title-high-precision-measurement-of-the-w-boson-mass-at-cms/
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BEGIN:VEVENT
DTSTART;TZID=UTC:20241107T160000
DTEND;TZID=UTC:20241107T170000
DTSTAMP:20260414T105229
CREATED:20241104T141109Z
LAST-MODIFIED:20241104T141109Z
UID:2691-1730995200-1730998800@rpm.physics.lbl.gov
SUMMARY:Speaker: Taylor Hoyt (LBNL) - Title: Toward a Precision Cosmology Measurement of the Hubble Constant
DESCRIPTION:Research Progress Meeting \nDate: November 7\, 2024 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Taylor Hoyt (LBNL) \nTitle: Toward a Precision Cosmology Measurement of the Hubble Constant \nAbstract: The local value of the Hubble constant (H0) derived from a Cepheid calibration of nearby supernovae (SNe) continues to disagree with values derived from a Lambda(or w)CDM interpretation of large scale cosmological datasets from\, e.g.\, Planck or DESI. The Cepheid-SN and high-z values of H0 consistently come in close to 73 and 68 km/s/Mpc\, respectively\, with a latest claim that the Hubble tension has surpassed 5 sigma significance. At the same time\, a calibration of the SNe based on the Tip of the Red Giant Branch (TRGB) distance indicator suggests significantly less of a tension\, consistently returning values near 69.5 km/s/Mpc. This persistent local Hubble Tension indicates that classical H0 experiments have not yet reached the level of accuracy required of a “precision cosmology” measurement. \nTo this end\, I will discuss ongoing efforts aimed at evaluating\, and ultimately reducing\, the amount that underestimated systematic errors could contribute to SN-derived H0 measurements and subsequently bias the evidence for or against the Hubble Tension. These efforts include: new\, higher signal-to-noise distance measurements from JWST\, investigations into the differing treatment of nearby SNe\, and the calibration of a new methodology for SN distance measurement twice as precise and accurate as the canonical approach. These paths together will ensure a more complete understanding of the Hubble Tension\, its significance (e.g.\, H0 tails)\, and will prove crucial in ushering the accuracy of local H0 measurements into the regime of precision cosmology. \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-taylor-hoyt-lbnl-title-toward-a-precision-cosmology-measurement-of-the-hubble-constant/
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BEGIN:VEVENT
DTSTART;TZID=UTC:20241112T160000
DTEND;TZID=UTC:20241112T170000
DTSTAMP:20260414T105229
CREATED:20241108T004044Z
LAST-MODIFIED:20241108T004044Z
UID:2694-1731427200-1731430800@rpm.physics.lbl.gov
SUMMARY:Speaker: Claire Lamman (Harvard) - Title: Untangling the Cosmic Web: Correlations between small-scale clustering and large-scale structure
DESCRIPTION:Research Progress Meeting \nDate: November 12\, 2024 \nTime: 4:00- 5:00 pm  \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Claire Lamman (Harvard) \nTitle: Untangling the Cosmic Web: Correlations between small-scale clustering and large-scale structure \nAbstract: Gravitational forces from the largest structures in the Universe leave a detectable imprint on galaxies and their local environment. I will present a new approach to tracing the tidal field using these correlations: the intrinsic alignment of small groups of galaxies\, or “multipelts”. Multiplets mostly consist of 2-4 galaxies within 1 Mpc/h of each other\, and we measure their orientations relative to the galaxy-traced tidal field. Using spectroscopic redshfits from the DESI Y1 survey\, we detect intrinsic alignment out to projected separations of 100 Mpc/h and beyond redshift 1. We find a simillar signal regardless of galaxy luminosity or color\, which could make multiplet alignment a useful tool for mapping the direction of the tidal field and any cosmological effects which impact it. Our detection demonstrates that galaxy clustering in the non-linear regime of structure formation preserves an interpretable memory of the large-scale tidal field. \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-claire-lamman-harvard-title-untangling-the-cosmic-web-correlations-between-small-scale-clustering-and-large-scale-structure/
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BEGIN:VEVENT
DTSTART;TZID=UTC:20241121T160000
DTEND;TZID=UTC:20241121T170000
DTSTAMP:20260414T105229
CREATED:20241115T215430Z
LAST-MODIFIED:20241115T215430Z
UID:2699-1732204800-1732208400@rpm.physics.lbl.gov
SUMMARY:Speaker: Gillian Kopp (Princeton University) - Title: Enabling Novel Long-Lived Particle Searches through 5D Calorimetry in the CMS Experiment
DESCRIPTION:Research Progress Meeting \nDate: November 21\, 2024 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Gillian Kopp (Princeton University) \nTitle: Enabling Novel Long-Lived Particle Searches through 5D Calorimetry in the CMS Experiment \nAbstract: The Compact Muon Solenoid (CMS) experiment records proton-proton collisions from the LHC to measure properties of the Standard Model and search for new physics. Recently\, long-lived particles have emerged as a compelling direction in which to search for physics beyond the Standard Model. As these searches are typically limited by the event selection\, implementing dedicated long-lived particle (LLP) triggers provides an excellent avenue to expand experimental coverage into this challenging parameter space. A novel hardware-level LLP trigger has been developed and implemented in the CMS experiment for Run 3 (2022-2026)\, exploiting the recent hadron calorimeter (HCAL) upgrade. The hardware- and firmware-based trigger algorithm identifies delayed jets\, resulting from the decay of massive LLPs\, and displaced jets\, resulting from LLPs that decay inside the HCAL. This approach significantly increases sensitivity to LLP signatures with soft hadronic final states\, including exotic decays of the Higgs boson. I review the trigger implementation\, calibration\, and performance\, showing results from recent HCAL timing scans that produce artificially delayed jets. The data collected with the new triggers provides a first look at the capabilities to capture softer events and expand the phase space accessible in LLP 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-gillian-kopp-princeton-university-title-enabling-novel-long-lived-particle-searches-through-5d-calorimetry-in-the-cms-experiment/
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