Suggestions for Improved Benchmark Scenarios for Higgs-Boson Searches at LEP2

摘要

We suggest new benchmark scenarios for the Higgs-boson search at LEP2.Keeping m_t and M_SUSY fixed, we improve on the definition of the maximalmixing benchmark scenario defining precisely the values of all MSSM parameterssuch that the new m_h^max benchmark scenario yields the parameters whichmaximize the value of m_h for a given tan(beta). The corresponding scenariowith vanishing mixing in the scalar top sector is also considered. We propose afurther benchmark scenario with a relatively large value of |mu|, a moderatevalue of M_SUSY, and moderate mixing parameters in the scalar top sector. Whilethe latter scenario yields m_h values that in principle allow to access thecomplete M_A-tan(beta)-plane at LEP2, on the other hand it contains parameterregions where the Higgs-boson detection can be difficult, because of asuppression of the branching ratio of its decay into bottom quarks.