Searching for an anomalous $\bar t q γ$ coupling via single top quark production at a $γγ$ collider

Details Searching for an anomalous $\bar t q γ$ coupling via single top quark production at a $γγ$ collider Searching for an anomalous $\bar t q γ$ coupling via single top quark production at a $γγ$ collider

1997-07-25

arxiv.org/abs/hep-ph/9707476v1

Phys.Lett. B419 (1998) 381-386

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, RevTeX, 1 PS figure

Scientific paper

10.1016/S0370-2693(97)01463-9

We investigate the potential of a high-energy $\gamma\gamma$ collider to detect an anomalous $\bar t q \gamma$ coupling from observation of the reaction $\gamma \gamma \to t\bar q$, $\bar t q$, where $q=c$ or $u$. We find that with $b$-tagging and suitable kinematic cuts this process should be observable if the anomalous coupling $\kappa/\Lambda$ is no less than about 0.05/TeV, where $\Lambda$ is the scale of new physics associated with the anomalous interaction. This improves upon the bound possible from observation of top decays at the Tevatron.

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