Lepton flavour violating heavy Higgs decays within the ?MSSM and their detection at the LHC

Diaz-Cruz, J.L., Ghosh, Dilip Kumar and Moretti, S. (2009) Lepton flavour violating heavy Higgs decays within the ?MSSM and their detection at the LHC. Physics Letters B, 679 (4), 376-381. (doi:10.1016/j.physletb.2009.07.065).

Record type: Article

Abstract

Within the ?MSSM, a Minimal Supersymmetric neutrino See-saw Model, Lepton Flavour Violating Higgs couplings are strongly enhanced at large tan? (?30), which can lead to BR(H0/A0???)?O(10?4), for MH0/A0?160 GeV. Enhancements on the production of Higgs bosons, through the gluon fusion mechanism, gg?H0/A0gg?H0/A0, and the associated production channel gg,qq¯?bb¯H0/A0, whose rates grow with tan?, as well as the mass degeneracy that occurs between the H0 and A0 states in this regime, also contribute to further the possibilities to detect a heavy Higgs signal into ?? pairs. We show that the separation of ?? Higgs events from the background at the upcoming CERN Large Hadron Collider could be done for Higgs masses up to about 600 GeV for 300 fb?1 of luminosity, for large tan? values. However, even with as little as 10 fb?1 one can probe H0/A0 masses up to 400 GeV or so, if tan?=60. Altogether, these processes then provide a new Higgs discovery mode as well as an independent test of flavour physics.

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