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Observability of the Lightest MSSM Higgs Boson with Explicit CP Violation via Gluon Fusion at the LHC

S. Y. Choi·Kaoru Hagiwara·Jae Sik Lee
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Abstract

We investigate the observability of the lightest Higgs boson in the gluon-fusion channel at the CERN Large Hadron Collider (LHC) in the minimal supersymmetric Standard Model with explicit CP-violating mixing among three neutral Higgs bosons. The lightest Higgs boson with its mass less than 130 GeV can be detected at the LHC via its gluon-fusion production followed by the decay into two photons. The explicit CP violation can suppress both the production cross section and the two-photon decay branching fraction so significantly that the signal cross section may be more than ten times smaller than the SM signal. This reduction factor can be as small as 1/40 if the lightest Higgs boson mass is 115 GeV and its production cross section at LEP2 is more than 90 % that of the SM case.

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S. Y. Choi, Kaoru Hagiwara, Jae Sik Lee. 2001-10-15. Observability of the Lightest MSSM Higgs Boson with Explicit CP Violation via Gluon Fusion at the LHC. https://doi.org/10.1016/s0370-2693(02)01257-1

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