Testing Lorentz and CPT invariance through ultra-high-energy cosmic rays

21 May 2019, 15:00
20m
Laguna Madre (Omni Hotel)

Laguna Madre

Omni Hotel

900 N Shoreline Blvd, Corpus Christi, TX 78401
Oral Alternatives to Supersymmetry Alternatives to Supersymmetry

Speaker

Dr Carlos Escobar (Instituto de Física UNAM)

Description

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.

Primary author

Dr Carlos Escobar (Instituto de Física UNAM)

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