GRB221009A gamma-ray events from non-standard neutrino self-interactions

TL;DR

This paper explores how high-energy gamma-ray observations can reveal new physics, specifically non-standard neutrino self-interactions, by analyzing gamma-ray data from GRB221009A and their interaction with CMB neutrinos.

Contribution

It demonstrates that gamma-ray fluxes can constrain non-standard neutrino self-interactions and links these constraints to cosmological observations like the Hubble tension.

Findings

Gamma-ray observations constrain neutrino self-interaction parameters.

Interaction of neutrinos with CMB neutrinos can produce attenuated gamma rays.

Constraints are consistent with those from cosmology and laboratory experiments.

Abstract

The flux of high-energy astrophysical neutrinos observed by the present generation of neutrino detectors has already indicated a few hints of new physics beyond the Standard Model. In this work, we show that high-energy gamma-ray observations can also be considered as a complementary probe for unveiling the source of high-energy astrophysical neutrino events and new physics. Recently, the LHAASO collaboration has reported O(5000) gamma-ray events in the energy range between 0.5 TeV -18 TeV from gamma-ray burst GRB221009A within 2000 seconds after the initial outburst. We showed that attenuated high-energy gamma rays can be produced from the interaction of astrophysical neutrinos with CMB neutrinos through non-standard self-interaction of neutrinos mediated by light scalar bosons. The non-standard interaction of neutrinos recently took a lot of attention in cosmology for its role in reducing Hubble tension. We have constrained the parameter space of non-standard self-interacting neutrinos from the flux of photons observed by LHAASO and showed consistency of the same with the resulting parameter space from Hubble tension requirements and other recent constraints from laboratory/cosmology.