Probing the light neutral Higgs boson scenario of the CP-violating MSSM Higgs sector at the LHC
Institut für Theoretische Physik und Astrophysik, Universität Würzburg, 97074, Würzburg, Germany
2 University of Southampton, School of Physics and Astronomy, Southampton SO17 1BJ, Highfield, UK
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In the CP-violating minimal supersymmetric standard model (MSSM), for certain values of the CP-violating phases associated to the universal trilinear couplings (A t , A b ) and the gluino mass , e.g., or , for GeV and -5, the lightest Higgs boson mass () is GeV. This mass interval is still allowed by results of standard LEP Higgs searches because of a strongly suppressed H 1 ZZ coupling. However, in the same region of parameter space in which these two conditions occur, the coupling is enhanced because the two mentioned sets of couplings satisfy a sum rule. In this paper we probe such a light Higgs scenario at the Large Hadron Collider (LHC) by studying associate production, leading to a signal. We show that the latter is readily accessible at the CERN hadron collider, upon the application of suitable selection cuts against the standard model (SM) backgrounds. Our parton level Monte Carlo (MC) analysis yields -45 signal events, completely free of SM background, for - 30 fb-1 of accumulated luminosity, after taking into account the overall efficiency for tagging four b-jets.
© Springer-Verlag, 2005