Cosmic-ray fermion decay through tau-antitau emission with Lorentz violation

Cosmic-ray fermion decay through tau-antitau emission with Lorentz violation

Phys. Rev. D 97, 115030 (2018) We study CPT and Lorentz violation in the tau-lepton sector of the Standard Model in the context of the Standard-Model Extension, described by a coefficient which is thus far unbounded by experiment. We show that any non-zero value of this coefficient implies that, for...

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Bibliographic Details
Main Authors: Escobar, C. A, Noordmans, J. P, Potting, R
Format: Journal Article
Language:English
Published: 20-04-2018
Subjects:
Physics - High Energy Physics - Phenomenology
Online Access:Get full text
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Summary:Phys. Rev. D 97, 115030 (2018) We study CPT and Lorentz violation in the tau-lepton sector of the Standard Model in the context of the Standard-Model Extension, described by a coefficient which is thus far unbounded by experiment. We show that any non-zero value of this coefficient implies that, for sufficiently large energies, standard-model fermions become unstable against decay due to the emission of a pair of tau-antitau leptons. We calculate the induced fermion energy-loss rate and we deduce the first limit on the Lorentz- and CPT-violating coefficient.
DOI:10.48550/arxiv.1804.07586