STAR French-Korean workshop "Higgs and Dark Matter Connections"

Neutrino self-interaction in the signals from blazar TXS 0506+056

16 déc. 2019, 15:00

30m

Salle du Conseil (Lyon)

Astrophysics/Cosmology

Orateur

Yongsoo Jho (Yonsei University)

Description

Even though conventional leptonic or lepto-hadronic models of blazar successfully explain the observed electromagnetic component of the flaring signal from the Blazar TXS 0506+056 in a large range of energy window $E_{\gamma }\in ({10}^{-1}\mathrm{e}\mathrm{V},{10}^2\mathrm{G}\mathrm{e}\mathrm{V})$, the predicted neutrino flux is too small to be consistent with the IceCube observation at $E_{\nu }\simeq 300\mathrm{T}\mathrm{e}\mathrm{V}$. We show that a sizable self-interaction of neutrinos with a light messenger resolves the discrepancy. Interestingly, the same physics can relieve the cosmological tension in $H_0$ and ${\sigma }_8$.