Searching for MeV-scale gauge bosons with IceCube

Anthony DiFranzo and Dan Hooper
Phys. Rev. D 92, 095007 – Published 5 November 2015

Abstract

Light gauge bosons can lead to resonant interactions between high-energy astrophysical neutrinos and the cosmic neutrino background. We study this possibility in detail, considering the ability of IceCube to probe such scenarios. We find the most dramatic effects in models with a very light Z (mZ10MeV), which can induce a significant absorption feature at Eν510TeV×(mZ/MeV)2. In the case of the inverted hierarchy and a small sum of neutrino masses, such a light Z can result in a broad and deep spectral feature at 0.110PeV×(mZ/MeV)2. Current IceCube data already excludes this case for a Z lighter than a few MeV and couplings greater than g104. We emphasize that the ratio of neutrino flavors observed by IceCube can be used to further increase their sensitivity to Z models and to other exotic physics scenarios.

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  • Received 19 July 2015

DOI:https://doi.org/10.1103/PhysRevD.92.095007

© 2015 American Physical Society

Authors & Affiliations

Anthony DiFranzo1,2 and Dan Hooper1,3

  • 1Center for Particle Astrophysics, Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
  • 2Department of Physics and Astronomy, University of California, Irvine, California 92697, USA
  • 3Department of Astronomy and Astrophysics, University of Chicago, Chicago, Illinois 60637, USA

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Issue

Vol. 92, Iss. 9 — 1 November 2015

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