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CPT and Lorentz violation in the electroweak sector

dc.contributor.authorColladay, D
dc.contributor.authorNoordmans, Jacob
dc.contributor.authorPotting, Robertus
dc.date.accessioned2019-03-15T14:13:37Z
dc.date.available2019-03-15T14:13:37Z
dc.date.issued2018
dc.description.abstractLong ago, Carroll, Field and Jackiw introduced CPT-violation in the photon sector by adding a dimension-3 gauge-invariant term parametrized by a constant four-vector parameter k(AF) to the usual (Maxwell) Lagrangian, deriving an ultra-tight bound from astrophysical data. Here, we will discuss recent work studying the extension of this term to the full electroweak gauge sector of the Standard Model. In the context of the Standard Model Extension, CPT and Lorentz violation arises from two gauge-invariant terms parametrized by the four vectors k(1) and k(2). First we will show how upon spontaneous breaking of the electroweak gauge symmetry these two terms yield Lorentz-violating terms for the photon and the W and Z bosons. As it turns out, the resulting modified dispersion relations for the W bosons yield spacelike momentum for one of its propagating modes at sufficiently large energy. This in turn allows for the possibility of Cherenkov-like W-boson emission by high-energy fermions such as protons, provoking their decay. Analysis of ultra-high-energy cosmic ray data allows for bounding the previously unbound parameter k(2), and, by combination with the ultra-tight bound on k(AF), the parameter k(1).pt_PT
dc.description.sponsorshipPortuguese Fundacao para a Ciencia e a Tecnologia (FCT) - SFRH/BPD/101403/2014program POPH/FSE New College of Floridapt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1088/1742-6596/952/1/012021pt_PT
dc.identifier.issn1742-6588
dc.identifier.urihttp://hdl.handle.net/10400.1/12427
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherIOP Publishingpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.titleCPT and Lorentz violation in the electroweak sectorpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FFIS%2F00099%2F2013/PT
oaire.citation.startPage012021pt_PT
oaire.citation.titleJournal of Physics: Conference Seriespt_PT
oaire.citation.volume952pt_PT
oaire.fundingStream5876
person.familyNameNoordmans
person.familyNamePotting
person.givenNameJacob
person.givenNameRobertus
person.identifier.ciencia-id2918-1063-F874
person.identifier.orcid0000-0002-3778-9258
person.identifier.orcid0000-0001-6915-3994
person.identifier.ridK-8704-2015
person.identifier.scopus-author-id7003735743
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication5f3f0587-c12d-4e9b-a066-dc828e087ff9
relation.isAuthorOfPublication.latestForDiscovery549a9237-c195-47df-a561-13a29464ceb9
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