Publication
CPT and Lorentz Violation in the Photon and Z-Boson Sector
| dc.contributor.author | Colladay, Donald | |
| dc.contributor.author | Noordmans, Jacob | |
| dc.contributor.author | Potting, Robertus | |
| dc.date.accessioned | 2018-12-07T14:57:55Z | |
| dc.date.available | 2018-12-07T14:57:55Z | |
| dc.date.issued | 2017-11 | |
| dc.description.abstract | Violation of CPT and Lorentz symmetry in the photon sector is described within the minimal Standard-Model Extension by a dimension-3 Chern-Simons-like operator parametrized by a four-vector parameter k(AF) that has been very tightly bounded by astrophysical observations. On the other hand, in the context of the SU (2) x U (1) electroweak gauge sector of the Standard-Model Extension, CPT and Lorentz violation is described similarly, by dimension-3 operators parametrized by four-vector parameters k(1) and k(2). In this work, we investigate in detail the effects of the resulting CPT and Lorentz violation in the photon and Z-boson sectors upon electroweak-symmetry breaking. In particular, we show that, for the photon sector, the relevant Lorentz-violating effects are described at the lowest order by the kAF term, but that there are higher-order momentum-dependent effects due to photon-Z boson mixing. As bounds on CPT and Lorentz violation in the Z sector are relatively weak, these effects could be important phenomenologically. We investigate these effects in detail in this work. | |
| dc.description.sponsorship | Fundacao para a Ciencia e a Tecnologia of Portugal (FCT) [UID/FIS/00099/2013, SFRH/BPD/101403/2014, POPH/FSE]; New College of Florida, Sarasota, Florida, U.S.A. | |
| dc.description.version | info:eu-repo/semantics/publishedVersion | |
| dc.identifier.doi | 10.3390/sym9110248 | |
| dc.identifier.issn | 2073-8994 | |
| dc.identifier.uri | http://hdl.handle.net/10400.1/11764 | |
| dc.language.iso | eng | |
| dc.peerreviewed | yes | |
| dc.publisher | MDPI Ag | |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
| dc.subject | Standard model | |
| dc.subject | Strings | |
| dc.title | CPT and Lorentz Violation in the Photon and Z-Boson Sector | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.awardURI | info:eu-repo/grantAgreement/FCT/5876/UID%2FFIS%2F00099%2F2013/PT | |
| oaire.citation.issue | 11 | |
| oaire.citation.startPage | 248 | |
| oaire.citation.title | Symmetry-Basel | |
| oaire.citation.volume | 9 | |
| oaire.fundingStream | 5876 | |
| person.familyName | Noordmans | |
| person.familyName | Potting | |
| person.givenName | Jacob | |
| person.givenName | Robertus | |
| person.identifier.ciencia-id | 2918-1063-F874 | |
| person.identifier.orcid | 0000-0002-3778-9258 | |
| 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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