Evidence for a break in the spectrum of astrophysical neutrinos

Luis A. Anchordoqui, Martin M. Block, Loyal Durand, Phuoc Ha, Jorge F. Soriano, and Thomas J. Weiler
Phys. Rev. D 95, 083009 – Published 21 April 2017

Abstract

The announcement by the IceCube Collaboration of the observation of 53 astrophysical neutrino candidates in the energy range 0.03Eν/PeV2 has been greeted with a great deal of justified excitement. Herein we provide fits of single and a broken power-law energy-spectra to these high-energy starting events (HESEs). By comparing our statistical results from fits to (background-free) shower HESE data with the spectral shape of muon neutrinos recently reported by the IceCube Collaboration, we show that there is (3σ) evidence for a break in the spectrum of astrophysical neutrinos. After that we use the fitted result to predict the rate of Glashow events (in the 6.3PeV region) and double-bang tau neutrino events (in the PeV region) just at the threshold of IceCube detection.

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  • Received 16 December 2016

DOI:https://doi.org/10.1103/PhysRevD.95.083009

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

Luis A. Anchordoqui1,2,3,†, Martin M. Block4,*, Loyal Durand5,‡, Phuoc Ha6,§, Jorge F. Soriano1,2,∥, and Thomas J. Weiler7,¶

  • 1Department of Physics & Astronomy, Lehman College, City University of New York, New York 10468, USA
  • 2Department of Physics, Graduate Center, City University of New York, New York 10016, USA
  • 3Department of Astrophysics, American Museum of Natural History, New York 10024, USA
  • 4Department of Physics & Astronomy, Northwestern University, Evanston, Illinois 60208, USA
  • 5Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, USA**
  • 6Department of Physics, Astronomy, and Geosciences, Towson University, Towson, Maryland 21252, USA
  • 7Department of Physics & Astronomy, Vanderbilt University, Nashville, Tennessee 37235, USA

  • *Deceased.
  • luis.anchordoqui@gmail.com
  • ldurand@hep.wisc.edu
  • §pdha@towson.edu
  • jfdezsoriano@gmail.com
  • tom.weiler@vanderbilt.edu
  • **Present address: 415 Pearl Court, Aspen, CO 81611, USA.

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Issue

Vol. 95, Iss. 8 — 15 April 2017

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