Search for flavor changing neutral currents via quark-gluon couplings in single top quark production using 2.3 fb^-1 of ppbar collisions
arXiv:1006.3575 · doi:10.1016/j.physletb.2010.08.011
Abstract
We present a search for flavor changing neutral currents via quark-gluon couplings in a sample of single top quark final states corresponding to 2.3 fb^-1 of integrated luminosity collected with the D0 detector at the Fermilab Tevatron Collider. We select events containing a single top quark candidates with an additional jet, and obtain separation between signal and background using Bayesian neural networks. We find consistency between background expectation and observed data, and set limits on flavor changing neutral current gluon couplings of the top quark to up quarks (tgu) and charm quarks (tgc). The cross section limits at the 95% C.L. are sigma_tgu<0.20pb and sigma_tgc<0.27pb. These correspond to limits on the top quark decay branching fractions of B(t->gu)<2.0*10^-4 and B(t->gc)<3.9*10^-3.
published by Phys. Lett. B
References in corpus (6)
- PYTHIA 6.4 Physics and Manual
- Single top quark production at the Tevatron: threshold resummation and finite-order soft gluon corrections
- Next-to-leading order QCD corrections to the top quark decay via model-independent FCNC couplings
- Search for production of single top quarks via flavor-changing neutral currents at the Tevatron
- Top-Quark FCNC Decay t->cgg in Topcolor-assisted Technicolor Model
- Observation of Single Top Quark Production at the Tevatron Collider
Cited by in corpus (12)
- A global approach to top-quark flavor-changing interactions
- Search for anomalous Wtb couplings and flavour-changing neutral currents in t-channel single top quark production in pp collisions at sqrt(s) = 7 and 8 TeV
- Gauged Flavor Group with Left-Right Symmetry
- Light Colored Scalar as Messenger of Up-Quark Flavor Dynamics in Grand Unified Theories
- Photon initiated single top quark production via flavor-changing neutral currents at the LHC
- The Single Top Quark Physics
- Search for top quark flavour changing neutral currents in same-sign top quark production
- Flavour-changing neutral scalar interactions of the top quark
- Loop induced top quark FCNC through top quark and dark matter interactions
- Vector-like quarks with a scalar triplet
- Flavour-changing top quark decays in the alternative left-right model
- Top Quark Physics at the Tevatron