BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//LAPTh - ECPv6.15.17//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:LAPTh
X-ORIGINAL-URL:https://www.lapth.cnrs.fr
X-WR-CALDESC:Évènements pour LAPTh
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:Europe/Paris
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20210328T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20211031T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20220327T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20221030T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20230326T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20231029T010000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220203T110000
DTEND;TZID=Europe/Paris:20220203T120000
DTSTAMP:20260409T092525
CREATED:20220620T163007Z
LAST-MODIFIED:20220620T163007Z
UID:7844-1643886000-1643889600@www.lapth.cnrs.fr
SUMMARY:Primordial neutrino asymmetry evolution in the early Universe [remote talk]
DESCRIPTION:Contrary to charged lepton degeneracies which are tightly constrained by the measured baryon-to-photon ratio\, the allowed values of the primordial neutrino asymmetries cover a large range. In order to study the evolution of these asymmetries in the early Universe\, one needs to solve a set of quantum kinetic equations that include vacuum mixing effects\, mean-field potentials and collisions (scattering and annihilations with charged leptons and among (anti)neutrinos)\, which represents a genuine numerical challenge. \nIn this talk\, I will present the results of a complete three-flavour calculation with the full collision term (which was always approximated in previous numerical studies) at the epoch of neutrino decoupling\, while laying emphasis on an effective description of neutrino oscillations that corresponds to averaging over the shortest time scale. In addition to reducing the computation time while preserving the accuracy of the results\, this “Adiabatic Transfer of Averaged Oscillations” (ATAO) approximation provides a consistent framework to understand the origin of the so-called synchronous oscillations. Moreover\, it leads to new results\, such as the existence of a regime of faster oscillations when the self-interaction mean-field domination dwindles. \n  \n 
URL:https://www.lapth.cnrs.fr/event/primordial-neutrino-asymmetry-evolution-in-the-early-universe-remote-talk/
CATEGORIES:Weekly seminars
END:VEVENT
END:VCALENDAR