The CTA Sensitivity to Lorentz-Violating Effects on the Gamma-Ray Horizon

Autor:	Fairbairn, Malcolm, Nilsson, Albin, Ellis, John, Hinton, Jim, White, Richard
Rok vydání:	2014
Předmět:	Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology
Druh dokumentu:	Working Paper
DOI:	10.1088/1475-7516/2014/06/005
Popis:	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 $\gamma + \gamma\rightarrow e^+ + e^-$ 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. Comment: 13 pages, 4 figures, typos corrected + references added, results unchanged. Matches version accepted by JCAP
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1401.8178 Zobrazit plný text záznamu View this record from Arxiv