Search for anomalous single top quark production in association with a photon in pp collisions at √(s) = 8 TeV
- Yerevan Physics Inst. (YerPhI) (Armenia). et al.
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.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
- Contributing Organization:
- CMS Collaboration
- Grant/Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1230041
- Alternate ID(s):
- OSTI ID: 22605233
- Report Number(s):
- FERMILAB-PUB--15-513-CMS; arXiv eprint number arXiv:1511.03951
- Journal Information:
- Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 35 Vol. 2016; ISSN 1029-8479
- Publisher:
- Springer BerlinCopyright Statement
- Country of Publication:
- United States
- Language:
- English
What can we learn from triple top-quark production?
|
journal | September 2019 |
FCNC decays of standard model fermions into a dark photon
|
journal | December 2016 |
Top-quark physics at the Large Hadron Collider
|
journal | May 2017 |
Constraining top quark flavor violation and dipole moments through three and four top quark productions at the LHC
|
journal | November 2018 |
Search for flavor-changing neutral currents in top quark decays t → H c and t → H u in multilepton final states in proton-proton collisions at s = 13 TeV with the ATLAS detector
|
journal | August 2018 |
Similar Records
Study of anomalous top quark flavor-changing neutral current interactions via the tW channel of single-top-quark production
A search for flavour changing neutral currents in top-quark decays in pp collision data collected with the ATLAS detector at √s = 7 TeV