R-parity violation effect on the top-quark pair production at linear colliders

Details R-parity violation effect on the top-quark pair production at linear colliders R-parity violation effect on the top-quark pair production at linear colliders

2003-08-24

arxiv.org/abs/hep-ph/0308238v2

Phys.Rev. D68 (2003) 095003

Physics

High Energy Physics

High Energy Physics - Phenomenology

Accepted by Phys.Rev.D

Scientific paper

10.1103/PhysRevD.68.095003

We investigate in detail the effects of the R-parity lepton number violation in the minimal supersymmetric standard model (MSSM) on the top-quark pair production via both $e^--e^+$ and $\gamma-\gamma$ collision modes at the linear colliders. We find that with the present experimental constrained $\rlap/{R}$ parameters, the effect from $\rlap/{R}$ interactions on the processes $e^+e^-\to t\bar{t}$ and $e^+e^- \to \gamma\gamma \to t\bar{t}$ could be significant and may reach -30% and several percent, respectively. Our results show that the $\rlap/{R}$ effects are sensitive to the c.m.s. energy and the relevant $\rlap/{R}$ parameters. However, they are not sensitive to squark and slepton masses when $m_{\tilde{q}} \geq 400 GeV$ (or $m_{\tilde{l}} \geq 300 GeV$) and are almost independent on the $\tan\beta$

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