Effects of Top-Quark Anomalous Decay Couplings at γγ Colliders

Details Effects of Top-Quark Anomalous Decay Couplings at γγ Colliders Effects of Top-Quark Anomalous Decay Couplings at γγ Colliders

2002-02-14

arxiv.org/abs/hep-ph/0202126v1

Nucl.Phys.Proc.Suppl. 111 (2002) 285-287

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages, no figure, Latex, presented at the 5th KEK Topical Conference(KEKTC5), to be publised in the proceedings

Scientific paper

10.1016/S0920-5632(02)01723-1

Most general tbW couplings were investigated in the process \gamma \gamma -> ttbar -> l^{+-} X for unpolarized photon beams. The double angular and energy distribution of the lepton was calculated and an optimal-observable analysis on it was carried out for the SM ttbar production mechanism. It was also shown that the leptonic angular distribution is insensitive to non-standard tbW vertex. That means that observation of non-standard effects indicates existence of some new physics in the production part.

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