Note on the normalization of predicted gamma-ray burst neutrino flux

Zhuo Li
Phys. Rev. D 85, 027301 – Published 6 January 2012

Abstract

We note that the theoretical prediction of neutrinos from gamma-ray bursts (GRBs) by IceCube overestimates the GRB neutrino flux, because they ignore both the energy dependence of the fraction of proton energy transferred to charged pions and the radiative energy loss of secondary pions and muons when calculating the normalization of the neutrino flux. After correction, GRB neutrino flux is reduced by a factor 5 for typical GRB spectral parameters and may be consistent with the present zero event detected by IceCube. More observations are important to push the sensitivity below the prediction and test whether GRBs are the sources of ultrahigh energy cosmic rays.

  • Received 27 September 2011

DOI:https://doi.org/10.1103/PhysRevD.85.027301

© 2012 American Physical Society

Authors & Affiliations

Zhuo Li

  • Department of Astronomy/Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China
  • Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China

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Issue

Vol. 85, Iss. 2 — 15 January 2012

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