Search for anomalous single top quark production in association with a photon in pp collisions at root s=8 TeV

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10333442" target="_blank" >RIV/00216208:11320/16:10333442 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1007/JHEP04(2016)035" target="_blank" >http://dx.doi.org/10.1007/JHEP04(2016)035</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/JHEP04(2016)035" target="_blank" >10.1007/JHEP04(2016)035</a>

Result language
angličtina
Original language name
Search for anomalous single top quark production in association with a photon in pp collisions at root s=8 TeV
Original language description
The result 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 t gamma events where t -> Wb and W -> mu nu 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. 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 tu gamma and tc gamma anomalous couplings and translated into upper limits on the branching fraction of the FCNC top quark decays: B (t -> u gamma) < 1.3 x 10(-4) and B(t -> c gamma) < 1.7 x 10(-3). Upper limits are also set on the cross section of associated t gamma production in a restricted phase-space region. These are the most stringent limits currently available.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BF - Elementary particle theory and high energy physics
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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