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

BELFORTE S.
•
CANDELISE, VIERI
•
CASARSA M.
altro
ZANETTI A.
2016
  • journal article

Periodico
JOURNAL OF HIGH ENERGY PHYSICS
Abstract
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 tγ events where t → Wb and W → μν 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 tuγ and tcγ anomalous couplings and translated into upper limits on the branching fraction of the FCNC top quark decays: B(t → uγ) < 1.3 × 10− 4 and B(t → cγ) < 1.7 × 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
WOS
WOS:000373855400001
Archivio
http://hdl.handle.net/11368/2870535
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84962811902
Diritti
open access
FVG url
https://arts.units.it/bitstream/11368/2870535/2/della_ricca.pdf
Soggetti
  • PARTICLE PHYSICS

  • LARGE HADRON COLLIDER...

  • CMS

Web of Science© citazioni
21
Data di acquisizione
Mar 26, 2024
Visualizzazioni
1
Data di acquisizione
Apr 19, 2024
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