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Flavour specific neutrino self-interaction: H 0 tension and IceCube

Mazumdar, A and Mohanty, S and Parashari, P (2022) Flavour specific neutrino self-interaction: H 0 tension and IceCube. In: Journal of Cosmology and Astroparticle Physics, 2022 (10).

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Official URL: https://doi.org/10.1088/1475-7516/2022/10/011


Self-interaction in the active neutrinos is studied in the literature to alleviate the H_0 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 H 0 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 (ντ ) in inverted hierarchy for explaining IceCube dips is consistent with the moderate self-interaction region of cosmological bounds at 1-σ 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-σ level only.

Item Type: Journal Article
Publication: Journal of Cosmology and Astroparticle Physics
Publisher: Institute of Physics
Additional Information: The copyright for this article belongs to the Author(s).
Keywords: cosmological neutrinos; cosmological parameters from CMBR; cosmology of theories beyond the SM; neutrino experiments
Department/Centre: Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited: 27 Oct 2022 09:20
Last Modified: 27 Oct 2022 09:20
URI: https://eprints.iisc.ac.in/id/eprint/77632

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