Multilepton SUSY signals from R-parity violation at the Tevatron

Abstract

The expected trilepton signals from $p \bar p \to \chi^\pm_1\chi^0_2 \to (\chi^0_1\ell^\pm\nu) (\chi^0_1\ell'^+\ell'^-) $ will be converted into hadronically quiet multilepton signals, if the two final $\chi^0_1$ have leptonic $R$-parity-violating (RPV) decays $\chi^0_1 \to \ell \ell' \nu$. We make illustrative calculations of the acceptance for these spectacular RPV signals, and point out that distinctive multilepton signals are possible even when the $R$-conserving trilepton signals are blocked by the ``spoiler mode" $\chi^0_2 \to h^0 \chi^0_1$. Other channels such as $p\bar p\to \chi_1^\pm \chi_2^0 \to (\chi_1^0\ell^\pm\nu) (\chi_1^0\nu\nu)$, $p\bar p\to \chi_1^\pm \chi_1^0 \to (\chi_1^0\ell\nu)\chi_1^0$ and $p\bar p\to\chi_1^+\chi_1^-\to(\chi_1^0\ell^+\nu)(\chi_1^0\ell'^-\nu)$ can also give quiet multileptons from RPV. We investigate these signals in the context of supersymmetric models with radiative electroweak symmetry breaking, using examples in the low-$\tan\beta$ $\lambda_t$ fixed-point region.