2023/01/04(Wed)
10:30 -12:00
一樓演講廳 1F, Auditorium
視訊演講 Video Seminar [ Meeting Link / ID: 2519 361 8084 / Password: 123456 ]
Title
Evolution of primordial neutrino helicities in gravitational inhomogeneities and cosmic and galactic magnetic fields
Speaker
Prof. Gordon Baym (Department of Physics, UIUC)Abstract
Primordial neutrinos from the Big Bang are about 100 times more prevalent than solar neutrinos, and at least two-thirds of them are now non-relativistic. These relic neutrinos, which have never been detected, decoupled in the early universe predominantly in helicity eigenstates. As I will discuss, their subsequent propagation through gravitational inhomogeneities and even background gravitational radiation, as well as cosmic and galactic magnetic fields partially flips their helicities, and can produce noticeable effects in their eventual detection. I will briefly mention future detection of relic neutrinos.
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Language
演講語言 (Language): in English
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