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New physics in t-> b W decay at next-to-leading order in QCD
Jure Drobnak, Svjetlana Fajfer, Jernej F. Kamenik
We consider contributions of non-standard tbW effective operators to the decay of an unpolarized top quark into a bottom quark and a W gauge boson at next-to-leading order in QCD.…
QCD Corrections to Flavor Changing Neutral Coupling Mediated Rare Top Quark Decays
Jure Drobnak, Svjetlana Fajfer, Jernej F. Kamenik
Recently we have presented an analysis of flavor changing neutral coupling mediated radiative top quark decays at next-to-leading order in QCD. In the present paper we provide the…
Light Colored Scalar as Messenger of Up-Quark Flavor Dynamics in Grand Unified Theories
Ilja Dorsner, Svjetlana Fajfer, Jernej F. Kamenik +1
The measured forward-backward asymmetry in the t tbar production at the Tevatron might be explained by the additional exchange of a colored weak singlet scalar. Such state appears…
Flavor Changing Neutral Coupling Mediated Radiative Top Quark Decays at Next-to-Leading Order in QCD
Jure Drobnak, Svjetlana Fajfer, Jernej F. Kamenik
We compute the branching ratios for the rare top quark decays t to c gamma and t to c Z mediated by effective flavor changing neutral couplings at the next-to-leading order in QCD…