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CATEGORIES:HEP phenomenology joint Cavendish-DAMTP seminar
SUMMARY:Cosmic Ray Backgrounds for Dark Matter Indirect De
 tection - Philipp Mertsch (Oxford)
DTSTART;TZID=Europe/London:20110317T160000
DTEND;TZID=Europe/London:20110317T170000
UID:TALK29468AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/29468
DESCRIPTION:Although cold dark matter has proven successful in
  explaining astrophysical observations on a wide r
 ange of scales\, its particle physics nature has s
 o far not been uncovered. If the dark matter parti
 cle was in fact weakly interacting one possible wa
 y of investigation would be the observation of hig
 h energy particles from the dark matter annihilati
 on or decay in the galactic halo. Recently\, appar
 ent anomalies in charged lepton cosmic rays as wel
 l as in galactic microwaves have been interpreted 
 in terms of such interactions. In this talk I will
  argue that the standard astrophysical backgrounds
  considered in these analyses are in fact much mor
 e complex than previously thought. In particular\,
  I will explain how the acceleration of secondary 
 leptons produced inside old supernova remnants can
  explain the observed signatures. I will also disc
 uss how the foreground subtraction employed to rev
 eal the so-called WMAP haze can produce fake signa
 tures.
LOCATION:Seminar Room B\, Rutherford Building\, Cavendish L
 aboratory
CONTACT:Kazuki Sakurai
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