Search for anomalous single top quark production in association with a photon in pp collisions at √(s) = 8 TeV
Abstract
We found the results of a search for flavor changing neutral currents (FCNC) through single top quark production in association with a photon is presented. The study is based on proton-proton collisions at a center-of-mass energy of 8 TeV using data collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 19.8 fb-1. The search for tγ events where t → Wb andW → μn is conducted in final states with a muon, a photon, at least one hadronic jet with at most one being consistent with originating from a bottom quark, and missing transverse momentum. Furthermore, there was no evidence of single top quark production in association with a photon through a FCNC is observed. Upper limits at the 95% confidence level are set on the tug and tcg anomalous couplings and translated into upper limits on the branching fraction of the FCNC top quark decays: B(t → uγ) < 1.3 x 10-4 and B(t →cγ) < 1.7 x 10-3. Upper limits are also set on the cross section of associated tγ production in a restricted phase-space region. These are the most stringent limits currently available.
- Authors:
-
- Yerevan Physics Inst. (YerPhI) (Armenia). et al.
- Publication Date:
- Research Org.:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Org.:
- CMS Collaboration
- OSTI Identifier:
- 1230041
- Report Number(s):
- FERMILAB-PUB-15-513-CMS
Journal ID: ISSN 1029-8479; arXiv eprint number arXiv:1511.03951
- Grant/Contract Number:
- AC02-07CH11359
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of High Energy Physics (Online)
- Additional Journal Information:
- Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2016; Journal Issue: 35; Journal ID: ISSN 1029-8479
- Publisher:
- Springer Berlin
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Khachatryan, Vardan. Search for anomalous single top quark production in association with a photon in pp collisions at √(s) = 8 TeV. United States: N. p., 2016.
Web. https://doi.org/10.1007/JHEP04(2016)035.
Khachatryan, Vardan. Search for anomalous single top quark production in association with a photon in pp collisions at √(s) = 8 TeV. United States. https://doi.org/10.1007/JHEP04(2016)035
Khachatryan, Vardan. Wed .
"Search for anomalous single top quark production in association with a photon in pp collisions at √(s) = 8 TeV". United States. https://doi.org/10.1007/JHEP04(2016)035. https://www.osti.gov/servlets/purl/1230041.
@article{osti_1230041,
title = {Search for anomalous single top quark production in association with a photon in pp collisions at √(s) = 8 TeV},
author = {Khachatryan, Vardan},
abstractNote = {We found the results of a search for flavor changing neutral currents (FCNC) through single top quark production in association with a photon is presented. The study is based on proton-proton collisions at a center-of-mass energy of 8 TeV using data collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 19.8 fb-1. The search for tγ events where t → Wb andW → μn is conducted in final states with a muon, a photon, at least one hadronic jet with at most one being consistent with originating from a bottom quark, and missing transverse momentum. Furthermore, there was no evidence of single top quark production in association with a photon through a FCNC is observed. Upper limits at the 95% confidence level are set on the tug and tcg anomalous couplings and translated into upper limits on the branching fraction of the FCNC top quark decays: B(t → uγ) < 1.3 x 10-4 and B(t →cγ) < 1.7 x 10-3. Upper limits are also set on the cross section of associated tγ production in a restricted phase-space region. These are the most stringent limits currently available.},
doi = {10.1007/JHEP04(2016)035},
journal = {Journal of High Energy Physics (Online)},
number = 35,
volume = 2016,
place = {United States},
year = {2016},
month = {4}
}
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