Associated production of Intermediate Higgs or Z-boson with $t\bar{t}$ pair in $\gamma \gamma$ collision

Abstract

Photon-photon linear colliders can be realized by laser back-scattering technique on the next generation linear $e^{+}{e}^{-}$ colliders. Here the associated productions of an intermediate mass Higgs (IMH) or Z-boson with $t\bar{t}$ pair in $\gamma \gamma$ collisions are studied. Since IMH is very unlikely to decay into $t\bar{t}$ pair, $t\bar{t}H$ production is the only direct channel to probe the Higgs-top Yukawa coupling in case of an IMH. $t\bar{t}Z$ production can be a potential background to $t\bar{t}H$ if the Higgs mass is close to $m_Z$. As an alternative to its parent $e^{+}{e}^{-}$ collider, $\gamma \gamma \to t\bar{t}H(Z)$ productions are compared with the corresponding productions in the $e^{+}{e}^{-}$ collisions.

Latex(RevTex), 13 pages, 5 topdrawer figures (available on request)

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• Threshold Effects on Heavy Quark Production in $\gamma \gamma$ Interactions
• Intermediate and Heavy Higgs Boson Physics at a 0.5 TeV e^+ e^- Collider

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