https://doi.org/10.1140/epjc/s2003-01300-8
theoretical physics
Trilepton+top signal from chargino-neutralino decays of MSSM charged Higgs bosons at the LHC
1
Department of Physics, Tsinghua University, 100084, Beijing, P.R. China
2
Department of Physics, University of Antwerpen, 2610, Antwerpen, Belgium
3
Department of Physics and Astronomy, University of Southampton, SO17 1BJ, Highfield, Southampton, UK
* e-mail: bisset@mail.tsinghua.edu.cn
We perform for the Large Hadron Collider (LHC) a detailed study of charged Higgs boson production via the top-bottom quark associated mode followed by decays into a chargino and a neutralino, with masses and couplings as given by the general minimal supersymmetric standard model (MSSM). We focus our attention on the region of parameter space with $m_{H^{\pm}} > m_t$ and intermediate values of $\tan\beta$, where identification of $H^{\pm}$ via decays into standard model (SM) particles has proven to be ineffective. Modelling the CMS detector, we find that a signature consisting of three hard leptons accompanied by a hadronically reconstructed top quark plus substantial missing transverse energy, which may result from $H^{\pm} \rightarrow {{\widetilde\chi}}_{1,2}^{\pm} {{\widetilde\chi}}_{1,2,3,4}^0$ decays, can be made viable over a large variety of initially overwhelming SM and MSSM backgrounds, provided MSSM input parameters are favourable: notably, small $\vert \mu \vert$ and light sleptons are important prerequisites. We quantify these statements by performing a fairly extensive scan of the parameter space, including realistic hadron-level simulations, and delineate some potential discovery regions.
© Springer-Verlag, 2003
