Publication
Cosmic-ray fermion decay by emission of on-shell W bosons with CPT violation
| dc.contributor.author | Colladay, D. | |
| dc.contributor.author | Noordmans, J. P. | |
| dc.contributor.author | Potting, Robertus | |
| dc.date.accessioned | 2019-11-20T15:07:25Z | |
| dc.date.available | 2019-11-20T15:07:25Z | |
| dc.date.issued | 2017-08 | |
| dc.description.abstract | 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 nonzero 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, an 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. | |
| dc.description.sponsorship | Fundacao para a Ciencia e a Tecnologia of Portugal (FCT) (SFRH/BPD/101403/2014, POPH/FSE) | |
| dc.identifier.doi | 10.1103/PhysRevD.96.035034 | |
| dc.identifier.issn | 2470-0010 | |
| dc.identifier.issn | 2470-0029 | |
| dc.identifier.uri | http://hdl.handle.net/10400.1/13030 | |
| dc.language.iso | eng | |
| dc.peerreviewed | yes | |
| dc.publisher | American Physical Society | |
| dc.subject | Arrival directions | |
| dc.subject | Lorentz | |
| dc.subject | Electrodynamics | |
| dc.subject | Array | |
| dc.title | Cosmic-ray fermion decay by emission of on-shell W bosons with CPT violation | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.awardURI | info:eu-repo/grantAgreement/FCT/5876/UID%2FFIS%2F00099%2F2013/PT | |
| oaire.citation.issue | 3 | |
| oaire.citation.startPage | 35034 | |
| oaire.citation.title | Physical Review D | |
| oaire.citation.volume | 96 | |
| oaire.fundingStream | 5876 | |
| person.familyName | Potting | |
| person.givenName | Robertus | |
| person.identifier.ciencia-id | 2918-1063-F874 | |
| person.identifier.orcid | 0000-0001-6915-3994 | |
| person.identifier.rid | K-8704-2015 | |
| person.identifier.scopus-author-id | 7003735743 | |
| project.funder.identifier | http://doi.org/10.13039/501100001871 | |
| project.funder.name | Fundação para a Ciência e a Tecnologia | |
| rcaap.rights | openAccess | |
| rcaap.type | article | |
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