BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-8072
DTSTART:20221220T200000Z
DURATION:PT1H0M0S
DTSTAMP:20260429T220456Z
LAST-MODIFIED:20221216T144150Z
LOCATION:Join Zoom Meeting https://berkeley.zoom.us/j/91230714547 Mee
ting ID: 912 3071 4547
SUMMARY:Towards Powerful Probes of Neutrino Self-Interactions in Super
novae\, Network in Neutrinos\, Nuclear Astrophysics\, and Symmetries (
N3AS) Seminar\, Po-Wen Chang \, CCAPP\, Ohio State University
DESCRIPTION:Neutrinos remain mysterious. As an example\, enhanced
\
nself-interactions (νSI) are allowed by laboratory\, cosmology\, and<
br>\nastrophysics data\, and are frequently invoked to explain anomali
es. In
\nthis talk\, I will briefly review the current probes of ν
SI. I will
\nthen discuss the potential interplay between νSI and
supernova
\nneutrinos. For the high neutrino densities within core-
collapse
\nsupernovae\, νSI could be important\, but robust observ
ables have been
\nlacking. We show that νSI makes supernova neutri
nos form a tightly
\ncoupled fluid that expands under relativistic
hydrodynamics. The
\noutflow becomes either a burst or a steady-sta
te wind\; which occurs
\nhere is uncertain. Though the diffusive en
vironment where neutrinos
\nare produced may make a wind more likel
y\, further work is needed to
\ndetermine when each case is realize
d. In the burst-outflow case\, νSI
\nincreases the duration of the
neutrino signal\, and even a simple
\nanalysis of SN 1987A data ha
s powerful sensitivity. For the
\nwind-outflow case\, we outline se
veral promising ideas that may lead to
\nnew observables. Combined\
, these results are important steps towards
\nsolving the 35-year-o
ld puzzle of how νSI impacts supernovae.
\n
URL:https://www.physics.wisc.edu/events/?id=8072
END:VEVENT
END:VCALENDAR