Optimal-Observable Analysis of Possible New Physics Using the b-quark in $\gamma \gamma \to t\overline{t} \to bX$

We study possible anomalous top-quark couplings generated by SU(2) x U(1) gauge invariant dimension-6 effective operators, using the final b-quark momentum distribution in gamma gamma -> tt -> bX. Taking into account non-standard tt gamma, tbW and gamma gamma H couplings, we perform an optimal...

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Detalles Bibliográficos
Autores principales: Grzadkowski, Bohdan, Hioki, Zenro, Ohkuma, Kazumasa, Wudka, Jose
Lenguaje:eng
Publicado: 2004
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2004.04.075
http://cds.cern.ch/record/725157
Descripción
Sumario:We study possible anomalous top-quark couplings generated by SU(2) x U(1) gauge invariant dimension-6 effective operators, using the final b-quark momentum distribution in gamma gamma -> tt -> bX. Taking into account non-standard tt gamma, tbW and gamma gamma H couplings, we perform an optimal-observable analysis in order to estimate the precision for the determination of all relevant non-standard couplings.

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