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SUMMARY:Neff and neutrino oscillations: role of the sterile neutrino and o
 f neutrino asymmetry
DTSTART;VALUE=DATE-TIME:20130219T110000Z
DTEND;VALUE=DATE-TIME:20130219T120000Z
DTSTAMP;VALUE=DATE-TIME:20260627T162416Z
UID:indico-event-1893@indico.ific.uv.es
DESCRIPTION:In the last recent years different anomalies observed in short
 -baseline neutrino oscillation experiments seem to point towards the exist
 ence of light sterile neutrinos. These sterile neutrinos can also be produ
 ced in the early universe by oscillations of the active neutrinos and can 
 affect different cosmological observables. In particular\, sterile neutrin
 os can contribute as extra radiation to the non electromagnetic energy den
 sity\, usually expressed in terms of the effective number of thermalized n
 eutrino species Neff. In order to compare the forthcoming Planck data on e
 xtra radiation with the possibility of sterile neutrino it is necessary a 
 systematic study of their abundance with parameters consistent with the in
 terpretations of short-baseline neutrino oscillation experiments. At this 
 regard\, we perform a detailed study of the flavor evolution in different 
 active-sterile oscillation schemes\, in presence of dynamical primordial n
 eutrino asymmetries. Moreover we discuss the impact on BBN of significant 
 distortions produced in the electron (anti)neutrino spectra in presence of
  large asymmetries.\n\nhttps://indico.ific.uv.es/event/1893/
LOCATION:Edf. Institutos de Investigación Sala Reuniones Sotano
URL:https://indico.ific.uv.es/event/1893/
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