Top-quark decay via R-parity violating interactions at the Tevatron

Details Top-quark decay via R-parity violating interactions at the Tevatron Top-quark decay via R-parity violating interactions at the Tevatron

1999-11-22

arxiv.org/abs/hep-ph/9911442v3

Phys.Lett. B476 (2000) 79-86

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 7 eps figures. Using LaTeX with axodraw. LSP decay mode included; more refs.; to appear in PLB

Scientific paper

10.1016/S0370-2693(00)00112-X

We consider the top-quark decay $t\to \tilde \tau b$ and $t\to \tau b \tilde{\chi}^0_1$ via explicit R-parity violating interactions in SUSY theories. We discuss the observability of those channels at the Fermilab Tevatron collider. The existing Tevatron data indicate a 95% confidence level upper bound on the coupling to be less than 0.94(0.63) for a long-lived (short-lived) $\tilde{\chi}^0_1$ with $m_{\tilde\tau}=70$ GeV. At Tevatron Run II with an integrated luminosity of 2 (10) fb$^{-1}$, one can obtain a 2$\sigma$ constraint as 0.38 (0.24) for a long-lived $\tilde{\chi}^0_1$ and 0.29(0.19) for a short-lived $\tilde{\chi}^0_1$, beyond the current indirect limit.

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