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SUMMARY:Unstable MeV neutrinos and primordial nucleosynthesis
DTSTART;VALUE=DATE-TIME:19990309T153000Z
DTEND;VALUE=DATE-TIME:19990309T163000Z
DTSTAMP;VALUE=DATE-TIME:20260703T004036Z
UID:indico-event-1115@indico.ific.uv.es
DESCRIPTION:The impact of unstable MeV tau neutrinos on primordial nucleos
 ynthesis (BBN) is considered for masses and lifetimes in the intervals 0.1
 -20 MeV and 0.001-400 sec\, respectively. The studied decay modes are nu_t
 au -> nu_mu(nu_e) + phi\, where phi is a massless (or light) scalar. The B
 oltzmann kinetic equations are solved numerically without any simplifying 
 assumptions. Depending on mass\, lifetime\, and decay channels of the tau 
 neutrinos\, the number of effective neutrino species at BBN (found from He
 -4)\, in addition to the 3 standard ones\, varies from -2 to +2.5.\n\nhttp
 s://indico.ific.uv.es/event/1115/
LOCATION:Dpto. de Fisica Teorica (UVEG) Sala Seminarios
URL:https://indico.ific.uv.es/event/1115/
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