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

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

2006-04-13

arxiv.org/abs/hep-ph/0604119v3

Phys.Lett.B668:282-285,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 3 figures, missed references were added

Scientific paper

10.1016/j.physletb.2008.08.065

Using the constraint on the single top production cross-section obtained at
the HERA collider, $\sigma(ep \to e t X)$, 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 % $

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