Flavour specific neutrino self-interaction: tension and IceCube
arXiv:2011.13685 · doi:10.1088/1475-7516/2022/10/011
Abstract
Self-interaction in the active neutrinos is studied in the literature to alleviate the tension. Similar self-interaction can also explain the observed dips in the flux of the neutrinos coming from the distant astro-physical sources in IceCube detectors. In contrast to the flavour universal neutrino interaction considered for solving the tension, which is ruled out from particle physics experiments, we consider flavour specific neutrino interactions. We show that the values of self-interaction coupling constant and mediator mass required for explaining the IceCube dips are inconsistent with the strong neutrino self-interactions preferred by the combination of BAO, HST and Planck data. However, the required amount of self-interaction between tau neutrinos () in inverted hierarchy for explaining IceCube dips is consistent with the moderate self-interaction region of cosmological bounds at 1- level. For the case of other interactions and hierarchies, the IceCube preferred amount of self-interaction is consistent with moderate self-interaction region of cosmological bounds at 2- level only.
arXiv comment25 Pages, 10 figures, 7 tables, matches the version published in JCAP
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