The Constraint on FCNC Coupling of the Top Quark with a Gluon from ep Collisions

Abstract

Using the constraint on the single top production cross-section obtained at the HERA collider, $\sigma (ep\to etX)$, we evaluate an upper limit on oupling constant of the anomalous top quark interaction with a gluon via flavor-changing neutral current: $|{\kappa }_{tgq}/\Lambda |\le 0.4{TeV}^{-1}$, BR$(t\to gq)<13$

Latex, 3 figures, missed references were added

References in corpus (2)

• Search for production of single top quarks via flavor-changing neutral currents at the Tevatron
• Searches for Flavour Changing Neutral Currents and Lepton Flavour Violation at HERA

Cited by in corpus (3)

• Search for production of single top quarks via flavor-changing neutral currents at the Tevatron
• Dimension six FCNC operators and top production at the LHC
• Review of Properties of the Top Quark from Measurements at the Tevatron