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Title: The CTA sensitivity to Lorentz-violating effects on the gamma-ray horizon

Abstract

The arrival of TeV-energy photons from distant galaxies is expected to be affected by their QED interaction with intergalactic radiation fields through electron-positron pair production. In theories where high-energy photons violate Lorentz symmetry, the kinematics of the process γ+γ→e{sup +}+e{sup −} is altered and the cross section suppressed. Consequently, one would expect more of the highest-energy photons to arrive if QED is modified by Lorentz violation than if it is not. We estimate the sensitivity of Cherenkov Telescope Array (CTA) to changes in the gamma-ray horizon of the Universe due to Lorentz violation, and find that it should be competitive with other leading constraints.

Authors:
;  [1];  [2];
  1. Theoretical Particle Physics and Cosmology Group, Physics Department, King's College London, Strand, London, WC2R 2LS (United Kingdom)
  2. Engineering Physics, Lund University, Sölvegatan 27, Lund (Sweden)
Publication Date:
OSTI Identifier:
22373540
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2014; Journal Issue: 06; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CROSS SECTIONS; ELECTRONS; GALAXIES; GAMMA RADIATION; PAIR PRODUCTION; PHOTONS; POSITRONS; QUANTUM ELECTRODYNAMICS; SENSITIVITY; SYMMETRY; TELESCOPES; TEV RANGE; UNIVERSE

Citation Formats

Fairbairn, M., Ellis, J., Nilsson, A., Hinton, J., and White, R., E-mail: malcolm.fairbairn@kcl.ac.uk, E-mail: atf10ani@student.lu.se, E-mail: John.Ellis@cern.ch, E-mail: jah85@leicester.ac.uk, E-mail: rw141@leicester.ac.uk. The CTA sensitivity to Lorentz-violating effects on the gamma-ray horizon. United States: N. p., 2014. Web. doi:10.1088/1475-7516/2014/06/005.
Fairbairn, M., Ellis, J., Nilsson, A., Hinton, J., & White, R., E-mail: malcolm.fairbairn@kcl.ac.uk, E-mail: atf10ani@student.lu.se, E-mail: John.Ellis@cern.ch, E-mail: jah85@leicester.ac.uk, E-mail: rw141@leicester.ac.uk. The CTA sensitivity to Lorentz-violating effects on the gamma-ray horizon. United States. https://doi.org/10.1088/1475-7516/2014/06/005
Fairbairn, M., Ellis, J., Nilsson, A., Hinton, J., and White, R., E-mail: malcolm.fairbairn@kcl.ac.uk, E-mail: atf10ani@student.lu.se, E-mail: John.Ellis@cern.ch, E-mail: jah85@leicester.ac.uk, E-mail: rw141@leicester.ac.uk. 2014. "The CTA sensitivity to Lorentz-violating effects on the gamma-ray horizon". United States. https://doi.org/10.1088/1475-7516/2014/06/005.
@article{osti_22373540,
title = {The CTA sensitivity to Lorentz-violating effects on the gamma-ray horizon},
author = {Fairbairn, M. and Ellis, J. and Nilsson, A. and Hinton, J. and White, R., E-mail: malcolm.fairbairn@kcl.ac.uk, E-mail: atf10ani@student.lu.se, E-mail: John.Ellis@cern.ch, E-mail: jah85@leicester.ac.uk, E-mail: rw141@leicester.ac.uk},
abstractNote = {The arrival of TeV-energy photons from distant galaxies is expected to be affected by their QED interaction with intergalactic radiation fields through electron-positron pair production. In theories where high-energy photons violate Lorentz symmetry, the kinematics of the process γ+γ→e{sup +}+e{sup −} is altered and the cross section suppressed. Consequently, one would expect more of the highest-energy photons to arrive if QED is modified by Lorentz violation than if it is not. We estimate the sensitivity of Cherenkov Telescope Array (CTA) to changes in the gamma-ray horizon of the Universe due to Lorentz violation, and find that it should be competitive with other leading constraints.},
doi = {10.1088/1475-7516/2014/06/005},
url = {https://www.osti.gov/biblio/22373540}, journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 06,
volume = 2014,
place = {United States},
year = {Sun Jun 01 00:00:00 EDT 2014},
month = {Sun Jun 01 00:00:00 EDT 2014}
}