BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Phenomenology  of the neutrino physics in Kaluza-Klein theories of
  low-scale quantum gravity
DTSTART;VALUE=DATE-TIME:20000914T093000Z
DTEND;VALUE=DATE-TIME:20000914T103000Z
DTSTAMP;VALUE=DATE-TIME:20261012T062644Z
UID:indico-event-1187@indico.ific.uv.es
DESCRIPTION:We discuss phenomenology of the neutrino physics in Kaluza-Kle
 in theories of low-scale quantum gravity. We show that one-loop effects in
 duced by Kaluza-Klein neutrinos\, albeit tiny individually\, act cumulativ
 ely in electroweak processes\, giving rise to a non-decoupling behaviour f
 or large values of the higher-dimensional Yukawa couplings. Owing to the n
 on-decoupling effects of Kaluza-Klein neutrinos\, we can derive stronger c
 onstraints on the parameters of the theory that originate from the non-obs
 ervation of flavour-violating and universality-breaking phenomena\, which 
 involve the W and Z bosons\, and the e\, $\\mu$ and $\\tau$ leptons. In th
 is theory we propose a four-neutrino model which can reconcile the existin
 g data coming from underground experiments in terms of neutrino oscillatio
 ns\, together with the hint from the LSND experiment and a possible neutri
 no contribution to the hot dark matter of the Universe. Our fourth light n
 eutrino $\\nu_s$ ($s$ for sterile) is identified with the zero mode of the
  Kaluza-Klein states. It combines with one of the active neutrinos in orde
 r to form a Quasi--Dirac neutrino with mass in the eV range. On the other 
 hand the solar and atmospheric mass scales arise from the violation of the
  fermion number on distant branes.\n\nhttps://indico.ific.uv.es/event/1187
 /
LOCATION:Edf. Institutos de Investigación Sala Seminarios IFIC
URL:https://indico.ific.uv.es/event/1187/
END:VEVENT
END:VCALENDAR