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DTSTART:20210101T000000
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DTSTART:20150308T100000
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DTSTART:20151101T090000
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BEGIN:VEVENT
DTSTART;TZID=UTC:20211116T130000
DTEND;TZID=UTC:20211116T130000
DTSTAMP:20260714T132507
CREATED:20211112T175120Z
LAST-MODIFIED:20211112T175120Z
UID:1737-1637067600-1637067600@rpm.physics.lbl.gov
SUMMARY:Taylor Hoyt (University of Chicago) "Using Astrophysical Distance Indicators to Test Standard Cosmology"
DESCRIPTION:Abstract: \nMeasurements of the universe’s present-day expansion rate\, or the Hubble constant (H0)\, that use a Cepheid variable star calibration of Type Ia supernovae (SNe Ia) are in >4σ disagreement with values predicted by the standard\, Lambda cold dark matter (LCDM) model of the universe. In this talk\, I will review the evidence for this “Hubble Tension” and discuss in particular my work on an alternative calibration of the SNe Ia using the Tip of the Red Giant Branch (TRGB)\, a standard candle that can return distances precise to 2% when observed in ancient populations of stars. Anchored by the TRGB\, we derived in the Carnegie Chicago Hubble Program a SN value of H0 that is significantly less in tension with base LCDM (<2σ) than the Cepheid-calibrated SN H0\, which raises the question of underestimated uncertainties and softens evidence for new physics. I will identify likely causes of this Cepheid-TRGB divergence\, present paths to a potential resolution\, and highlight how the astrophysical distance scale can converge on a self-consistent\, 1% determ\n──────────\nTroy Cortez is inviting you to a scheduled Zoom meeting. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/95226946591?pwd=NEw3Q1FvL1grb204RUh5ckREbkxldz09 \nMeeting ID: 952 2694 6591\nPasscode: 432494\nOne tap mobile\n+16699006833\,\,95226946591#\,\,\,\,*432494# US (San Jose)\n+13462487799\,\,95226946591#\,\,\,\,*432494# US (Houston) \nDial by your location\n+1 669 900 6833 US (San Jose)\n+1 346 248 7799 US (Houston)\n+1 253 215 8782 US (Tacoma)\n+1 646 558 8656 US (New York)\n+1 301 715 8592 US (Washington DC)\n+1 312 626 6799 US (Chicago)\nMeeting ID: 952 2694 6591\nPasscode: 432494\nFind your local number: https://lbnl.zoom.us/u/adl0MwWuqw \nJoin by SIP\n95226946591@zoomcrc.com \nJoin by H.323\n162.255.37.11 (US West)\n162.255.36.11 (US East)\n115.114.131.7 (India Mumbai)\n115.114.115.7 (India Hyderabad)\n213.19.144.110 (Amsterdam Netherlands)\n213.244.140.110 (Germany)\n103.122.166.55 (Australia Sydney)\n103.122.167.55 (Australia Melbourne)\n64.211.144.160 (Brazil)\n69.174.57.160 (Canada Toronto)\n65.39.152.160 (Canada Vancouver)\n207.226.132.110 (Japan Tokyo)\n149.137.24.110 (Japan Osaka)\nMeeting ID: 952 2694 6591\nPasscode: 432494 \n──────────
URL:https://rpm.physics.lbl.gov/event/taylor-hoyt-university-of-chicago-using-astrophysical-distance-indicators-to-test-standard-cosmology/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20150521T160000
DTEND;TZID=America/Los_Angeles:20150521T170000
DTSTAMP:20260714T132507
CREATED:20150729T185733Z
LAST-MODIFIED:20150729T185733Z
UID:17-1432224000-1432227600@rpm.physics.lbl.gov
SUMMARY:Lifan Wang (Texas A&M)
DESCRIPTION:Title: The Latest Development of Optical/NIR Astronomy at Dome A\, Antarctica\nAbstract:\nDome A\, the highest spot on Antarctic plateau is likely the best site for ground-based astronomy. I present in this talk an update on the recent progresses in building an astronomical observatory at Dome A. In the near term\, the 68cm wide field Antarctic Survey Telescopes (AST3) will be collecting data that are continuous for more than 3 months during the Antarctic winter. A time-domain study in the NIR of supernovae and other transients will be enabled by an infrared version of AST3. We expect the AST3 data to be unique in terms of their time coverage. In the longer term\, we expect to build one 2.5 meter optical/NIR telescope and one 5 meter THz telescope\, and use these telescopes to discover supernova explosions at redshift far beyond what is possible with a conventional temperate telescope.
URL:https://rpm.physics.lbl.gov/event/lifan-wang-texas-am/
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20150430T160000
DTEND;TZID=America/Los_Angeles:20150430T170000
DTSTAMP:20260714T132507
CREATED:20150430T130254Z
LAST-MODIFIED:20150430T130254Z
UID:144-1430409600-1430413200@rpm.physics.lbl.gov
SUMMARY:Jennifer Thomas (UCLA; Univ. of Wisconsin) " Cheap as CHIPS - Large Water Cherenkov Detectors: Faster and Cheaper"
DESCRIPTION:Title: Cheap as CHIPS – Large Water Cherenkov Detectors: Faster and Cheaper\nAbstract:\nCHIPS is an R&D program focused on designing and fabricating a cost-effective large water Cherenkov detector (WCD) to study neutrino oscillations. Traditional WCD’s with a low energy threshold have been built in special large underground caverns. Civil construction of such facilities is costly and the excavation phase significantly delays the detector installation although\, in the end\, it offers a well-shielded apparatus with versatile physics program. Following concepts developed for the LBNE WCD (arXiv:1204.2295)\, we propose to submerge a detector in a deep water reservoir\, which avoids the excavation and exploits the directionality of an accelerator neutrino beam for optimizing the detector. Following the LOI (arXiv:1307.5918)\, we have submerged a small test detector in a mine pit in Minnesota\, 7 mrad off NuMI axis. Borrowing technical ideas and solutions from IceCube and KM3Net\, we are now focusing on designing a large (10-20kt) isolated water container to house photodetectors with underwater readout and triggering. We will describe the CHIPS concept and its physics potential in more detail\, and will present the ongoing R&D activities.
URL:https://rpm.physics.lbl.gov/event/jennifer-thomas-ucla-univ-of-wisconsin-cheap-as-chips-large-water-cherenkov-detectors-faster-and-cheaper/
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20150423T160000
DTEND;TZID=America/Los_Angeles:20150423T170000
DTSTAMP:20260714T132507
CREATED:20151008T130759Z
LAST-MODIFIED:20151008T130759Z
UID:145-1429804800-1429808400@rpm.physics.lbl.gov
SUMMARY:Brian Hamilton (Univ. of Maryland) "New Results from LHCb"
DESCRIPTION:Title: New Results from LHCb\nAbstract:\nI will present several new results based on the full dataset collected by the LHCb detector during the 2011 and 2012 running periods. In particular\, the first measurement from LHCb of the magnitude of the CKM matrix element Vub via semileptonic decays of the $\Lambda_{b}$ baryon and its impact on contributions of right handed currents will be discussed. I will also present new results on the electroweak penguin decay $B \to K^{*} \mu\mu$ and the status of anomalies in this channel observed in the previous analysis which used a subset of the full data. Plans for the LHCb experiment during Run 2 of the LHC and beyond will also be discussed.
URL:https://rpm.physics.lbl.gov/event/brian-hamilton-univ-of-maryland-new-results-from-lhcb/
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