Cosmic-ray fermion decay by emission of on-shell W bosons with CPT violation
| Autor: | Robertus Potting, J. P. Noordmans, Don Colladay |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Particle physics Photon 010308 nuclear & particles physics Lorentz transformation High Energy Physics::Phenomenology Electroweak interaction Fermion 01 natural sciences symbols.namesake Quantization (physics) Quantum electrodynamics 0103 physical sciences symbols High Energy Physics::Experiment Covariant transformation 010306 general physics Quantum Boson |
| Zdroj: | Physical Review D. 96 |
| ISSN: | 2470-0029 2470-0010 |
| DOI: | 10.1103/physrevd.96.035034 |
| Popis: | We study CPT and Lorentz violation in the electroweak gauge sector of the Standard Model in the context of the Standard-Model Extension. In particular, we consider the Lorentz-violating and CPT-odd Chern-Simons like parameter for the W boson, which is thus far unbounded by experiment. We demonstrate that any non-zero value of this parameter implies that, for sufficiently large energies, one of the polarization modes of the W boson propagates with spacelike four-momentum. In this scenario, emission of W bosons by ultra-high-energy cosmic rays is possible. We calculate the induced fermion energy-loss rate and we deduce the first limit on the pertinent Lorentz- and CPT-violating parameter that couples to the W boson. Consistency between the quantum description in various reference frames is preserved by using a recently formulated covariant quantization procedure for massive photons and applying it to the W bosons. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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