Abstract.
We assess the potential of detecting a charged Higgs boson of the MSSM at the LHC via its decays into a chargino and a neutralino. We focus our attention on the region of parameter space with \(m_{H^{\pm}} > m_t\) and \(3 \lesssim \tan \beta \lesssim 10\), where identification of the \(H^{\pm}\) via other decay modes has proven to be ineffective. Searching for means to plug this hole, we simulate the decays \(H^{\pm} \rightarrow{\tilde\chi}_1^{\pm}{\tilde\chi}_1^0\) and \(H^{\pm} \rightarrow{\tilde\chi}_1^{\pm}{\tilde\chi}_2^0, {\tilde\chi}_1^{\pm}{\tilde\chi}_3^0\)– the former can yield a single hard lepton (from the chargino decay) while the latter can yield three leptons (from the chargino and neutralino decays). Coupled with the dominant top quark + charged Higgs boson production mode, the resulting signature is one or three hard, isolated leptons, substantial missing transverse momentum and a reconstructed (via a 3-jet invariant mass) top quark. The single lepton channel is swamped by background processes; however, with suitable cuts, a trilepton signal emerges. While such a signal suffers from a low number of surviving events (after cuts) and is dependent on several MSSM input parameters (notably \(M_2, \mu\), and slepton masses), it does fill at least some of the void left by previous investigations.
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Received: 21 October 2000 / Published online: 23 February 2001
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Bisset, M., Guchait, M. & Moretti, S. Signatures of MSSM charged Higgs bosons via chargino–neutralino decay channels at the LHC. Eur. Phys. J. C 19, 143–154 (2001). https://doi.org/10.1007/s100520100550
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DOI: https://doi.org/10.1007/s100520100550