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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-1806
DTSTART:20100426T210000Z
DURATION:PT1H0M0S
DTSTAMP:20260316T081052Z
LAST-MODIFIED:20100313T155516Z
LOCATION:4274 Chamberlin
SUMMARY:Cosmic Rays and the Quest for New Physics\, NPAC (Nuclear/Part
 icle/Astro/Cosmo) Forum\, Stefano Profumo\, U.C. Santa Cruz
DESCRIPTION:Recent cosmic ray data\, notably from the Pamela and Fermi
  satellites\, indicate that previously unaccounted-for powerful source
 s in the Galaxy inject high-energy electrons and positrons. Interestin
 gly\, this new source class might be related to new fundamental partic
 le physics\, and specifically to pair-annihilation or decay of galacti
 c dark matter. I will<br>
\ndiscuss how this exciting scenario is cons
 trained by Fermi gamma-ray observations\, and which astrophysical sour
 ce counterparts could also be responsible for the high-energy electron
 -positron excess. In particular\, I will review the case for nearby ma
 ture pulsars\, and the impact of newly<br>
\ndiscovered radio-quiet pu
 lsars that pulsate in gamma rays. While<br>
\nhigh-energy electron-pos
 itron measurements sample local (closer than 1 kpc) cosmic rays\, diff
 use radio and gamma-ray emission informs us about the global galactic 
 cosmic ray population. I will thus offer a few thoughts on recent clai
 ms involving the detection of diffuse radio ("WMAP haze") and gamma-ra
 y ("Fermi haze") emissions and on implications for the quest for New P
 hysics
URL:https://www.physics.wisc.edu/events/?id=1806
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