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BEGIN:VEVENT
SUMMARY:Eva Silverstein (Stanford)
DTSTART:20200520T161500Z
DTEND:20200520T171500Z
DTSTAMP:20260404T111413Z
UID:CambridgeHEPGRColl/1
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/Cambr
 idgeHEPGRColl/1/">Multipoint Correlators in Multifield Cosmology: formal s
 tructure and applications</a>\nby Eva Silverstein (Stanford) as part of Ca
 mbridge HEP-GR colloquium\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/CambridgeHEPGRColl/1/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Wendy Freedman (University of Chicago)
DTSTART:20200527T143000Z
DTEND:20200527T153000Z
DTSTAMP:20260404T111413Z
UID:CambridgeHEPGRColl/2
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/Cambr
 idgeHEPGRColl/2/">Tension in the Hubble Constant</a>\nby Wendy Freedman (U
 niversity of Chicago) as part of Cambridge HEP-GR colloquium\n\n\nAbstract
 \nOver the last couple of decades\, the accuracy with which we can measure
  distances to galaxies and determine Ho has improved significantly. I will
  discuss two of our most precise methods for measuring distances in the lo
 cal universe: Cepheids and the Tip of the Red Giant Branch (TRGB). I will 
 present new results from the Carnegie-Chicago Hubble Program (CCHP)\, the 
 goal of which is to independently measure a value of the Hubble constant t
 o very high precision and accuracy. We have built an entirely new extragal
 actic distance scale from the ground up. Using the Hubble Space Telescope 
 Advanced Camera for Surveys\, the CCHP is using the TRGB to calibrate Type
  Ia supernovae. Our value of the Hubble constant\, Ho = 69.6 / 0.8 (statis
 tical) / 1.7 (systematic) km/sec/Mpc\, falls midway between the value obta
 ined from the Planck Cosmic Microwave Background analysis\, and that obtai
 ned using Cepheids. I will address the uncertainties\, discuss the current
  tension in Ho\, and whether there is need for additional physics beyond t
 he standard CDM model.\n
LOCATION:https://stable.researchseminars.org/talk/CambridgeHEPGRColl/2/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Matt Reece (Harvard)
DTSTART:20200603T131500Z
DTEND:20200603T141500Z
DTSTAMP:20260404T111413Z
UID:CambridgeHEPGRColl/3
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/Cambr
 idgeHEPGRColl/3/">A Swampland Tour\, From Global Symmetries to Axion Physi
 cs</a>\nby Matt Reece (Harvard) as part of Cambridge HEP-GR colloquium\n\n
 \nAbstract\nThe Swampland program aims to distinguish effective quantum fi
 eld theories that can potentially arise within UV-complete quantum gravity
  theories (“the Landscape”) from those that cannot (“the Swampland
 ”). The most well-established such criterion is that theories of quantum
  gravity never have exact global symmetries. I will discuss some generaliz
 ations and consequences of this idea. In particular\, I will discuss work 
 in progress (with Heidenreich\, McNamara\, Montero\, Rudelius\, and Valenz
 uela) on how axion fields often play a crucial role in banishing global sy
 mmetries from a theory\, with potential phenomenological implications.\n
LOCATION:https://stable.researchseminars.org/talk/CambridgeHEPGRColl/3/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jiji Fan (Brown University)
DTSTART:20200610T131500Z
DTEND:20200610T141500Z
DTSTAMP:20260404T111413Z
UID:CambridgeHEPGRColl/4
DESCRIPTION:by Jiji Fan (Brown University) as part of Cambridge HEP-GR col
 loquium\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/CambridgeHEPGRColl/4/
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