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DTSTART:20261101T020000
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DTSTART:20270314T020000
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UID:calendar.71257.field_date.0@calendar.lafayette.edu
DTSTAMP:20260422T110933Z
DESCRIPTION:Professor Dan Grin from Haverford will tell us about his work o
 n cosmology \nand the early universe! \n \n\n 'Constant evolution -- new t
 ests of spatiotemporal evolution/variation in \nthe electric charge using 
 radio and microwave emission from the early \nuniverse.'\n\n \n*Abstract*
 \nBeyond-the-standard-model (BSM) models of particle physics and a number 
 of \ntantalizing astronomical observations may imply that the fundamental 
 \n'constants' of nature (e.g. the electric charge) could in fact vary in s
 pace \nand time. The well-characterized cosmic microwave background (CMB) 
 and future \nmeasurements of radio emission at 21-cm wavelengths from neut
 ral gas (before \nand after the formation of the first stars) offer pristi
 ne probes of atomic \nphysics in the early universe. As a result\, models 
 where fundamental \n'constants' vary can be tested using our radio/microwa
 ve observations of the \nearly universe. I will discuss the key aspects of
  these BSM models\, the \nrelevant atomic physics\, introduce the CMB and 
 21-cm primordial radiation\, \nand then show completed and ongoing results
  testing these models with data\, \nand forecasting the promise of future 
 observations. If time remains\, I will \nmention connections between these
  theories and the mysteries of dark matter \nand dark energy.\n \nLooking 
 forward to seeing you all there!\n\n \nContact Prof. Douglas (douglste@laf
 ayette.edu [1]) with questions or for \nadditional info\n\n[1] mailto:doug
 lste@lafayette.edu
DTSTART;TZID=America/New_York:20260424T150000
DTEND;TZID=America/New_York:20260424T161500
LAST-MODIFIED:20260420T200615Z
LOCATION:Hugel 100
SUMMARY:Physics Colloquium
URL;TYPE=URI:https://calendar.lafayette.edu/node/71257
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