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Network in Neutrinos, Nuclear Astrophysics, and Symmetries (N3AS) Seminars

<< Fall 2020 Spring 2021 Summer 2021 >>
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Events During the Week of March 28th through April 4th, 2021

Monday, March 29th, 2021

No events scheduled

Tuesday, March 30th, 2021

Theory of Fast Flavor Conversion of Supernova Neutrinos
Time: 2:00 pm
Place: hosted by Baha Balantekin
Speaker: Soumya Bhattacharyya, Tata Institute of Fundamental Research
Abstract: A supernova natively emits neutrinos and antineutrinos of all flavors with different luminosities and energy spectra. These neutrinos can undergo neutrino-neutrino forward-scattering inside the dense anisotropic interior of the star and can lead to ``Fast Neutrino Flavor Conversion''. We present the first ever theory of ``Fast Neutrino Flavor Conversion'' beyond the linear regime to show how the different neutrino flavors are brought closer to each other or in other words ``Flavor Depolarizes'' due to irreversible decoherence-like processes occurring at a Tera-Hz rate, determined by the large neutrino density. Our theory explains how depolarization happens, when does it happen, what determines the epoch and finally describes a method to calculate the extent of depolarized fluxes. This new result allows detailed implementation of flavor-dependent neutrino transport in supernova simulations and paves the way for supernova neutrino phenomenology.
Host: Baha Balantekin
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Wednesday, March 31st, 2021

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Thursday, April 1st, 2021

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Friday, April 2nd, 2021

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