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SUMMARY:Sterile neutrinos in theory\, laboratories and the Universe - Silv
 ia Pascoli (Durham)
DTSTART:20160215T130000Z
DTEND:20160215T140000Z
UID:TALK63979@talks.cam.ac.uk
CONTACT:Tommaso Giannantonio
DESCRIPTION:Sterile neutrinos are neutral fermions which mix with ordinary
  neutrinos. They emerge in the simplest extensions of the Standard Model a
 nd their mass can range from sub-eV to GUT scales. I will briefly review t
 he theoretical motivations for sterile neutrinos and the experimental hint
 s in favour of their existence and the possible strategies to search for t
 hem. Thanks to their mixing\, they could have been produced in the Early U
 niverse via neutrino oscillations. They would be a component of hot or col
 d dark matter and would have had an important impact on the evolution of t
 he Universe. I will discuss the mechanisms of sterile neutrino production 
 and the constraints which can be put on their properties using the observa
 tions from the Cosmic Microwave Background and large scale structure forma
 tion. I will discuss also the (unconfirmed) 3.5 keV x-ray line which was r
 eported last year using observations of nearby clusters by the XMM-Newton 
 and Chandra satellites and its possible explanation in terms of sterile ne
 utrino dark matter.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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