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SUMMARY:Neutrino-nucleon scattering rate in the relativistic random phase 
 approximation
DTSTART;VALUE=DATE-TIME:20011004T103000Z
DTEND;VALUE=DATE-TIME:20011004T113000Z
DTSTAMP;VALUE=DATE-TIME:20261108T210758Z
UID:indico-event-1233@indico.ific.uv.es
DESCRIPTION:We calculate the in-medium modification to neutrino-nucleon sc
 attering in the relativistic random phase approximation in the framework o
 f a relativistic hadronic field theory with sigma\, omega\, pi\, rho and d
 elta mesons exchange. In view of applications to neutrino transport in pro
 toneutron stars\, we study the evolution of the neutrino opacity as a func
 tion of density\, asymmetry and temperature Special attention was paid to 
 the issues of renormalization of vacuum fluctuations\, short range residua
 l interaction and meson mixing. In contrast to previous work where strong 
 reduction factors were predicted\, RPA corrections with respect to the mea
 n field approximation amounting to only 10% to 15% at high density were fo
 und in this work. When meson mixing is fully taken into account\, the redu
 ction factor is found to be even smaller.\n\nhttps://indico.ific.uv.es/eve
 nt/1233/
LOCATION:Dpto. de Física Teórica (UVEG) Sala Seminarios
URL:https://indico.ific.uv.es/event/1233/
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