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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-4247
DTSTART:20160914T210000Z
DURATION:PT1H0M0S
DTSTAMP:20260419T055941Z
LAST-MODIFIED:20160912T175040Z
LOCATION:5280 Chamberlin hall
SUMMARY:An Effective Field Theory Analysis of LUX and Other Direct Dar
 k Matter Searches \, High Energy Seminar\, Nicole Larsen\, Kalvi Insti
 tute for Cosmological Physics\, Univ Chicago
DESCRIPTION:The Large Underground Xenon (LUX) dark matter search is a 
 370-kg dual-phase xenon-based time projection chamber that operates by
  detecting light and ionization signals from particles incident upon a
  xenon target.  With its 2013 report of the world’s first sub-zeptob
 arn spin-independent WIMP-nucleon cross section limit\, LUX emerged as
  a frontrunner in the field of dark matter direct detection.  In Decem
 ber 2015\, LUX released an updated analysis of its 2013 dataset leadin
 g to an overall 23% increase in sensitivity for high-mass WIMPs and ev
 en more significant improvement for low-mass WIMPs.  And in July 2016\
 , LUX released results from an extended 332-day dataset\, finding no e
 vidence of WIMPs and improving its limit to a minimum of 0.2 zeptobarn
 s for 50-GeV WIMPs.  However\, tension between experiments and the abs
 ence of a definitive positive detection suggest it would be prudent to
  search for WIMPs outside the standard spin-independent/spin-dependent
  analyses.  Recent effective field theory work has identified a comple
 te set of 14 possible independent WIMP-nucleon interaction operators r
 estricted only by basic symmetries.  These operators produce not only 
 spin-independent and spin-dependent nuclear responses but also novel n
 uclear responses such as angular-momentum-dependent and spin-orbit cou
 plings.  Here we report on the extension of the LUX analysis to search
  for all 14 of these interactions\, comment on the possible suppressio
 n of event rates due to operator interference\, and investigate severa
 l other prominent direct detection experiments to show that under this
  new framework\, LUX again exhibits world-leading sensitivity.
URL:https://www.physics.wisc.edu/events/?id=4247
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