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 $E_\gamma \in (10^{-1}{\rm eV}, 10^2~{\rm GeV})$, the predicted neutrino flux is too small to be consistent with the IceCube observation at $E_\nu \simeq 300~{\rm TeV}$. 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 $\sigma_8$.
