Physics Opportunities at mu+mu- Higgs Factories
C. Blöchinger, M. Carena, J. Ellis, H. Fraas, F. Franke, D. Garcia, S. Heinemeyer, S. Kraml, G. Moortgat-Pick, W. Murray, F. von der Pahlen, A. Pilaftsis, C. E. M. Wagner, G. Weiglein
Abstract
We update theoretical studies of the physics opportunities presented by mu+mu- Higgs factories. Interesting measurements of the Standard Model Higgs decays into bb, tau+tau- and WW* may be possible if the Higgs mass is less than about 160 GeV, as preferred by the precision electroweak data, the mass range being extended by varying appropriately the beam energy resolution. A suitable value of the beam energy resolution would also enable the uncertainty in the b-quark mass to be minimized, facilitating measurements of parameters in the MSSM at such a first mu+mu- Higgs factory. These measurements would be sensitive to radiative corrections to the Higgs-fermion-antifermion decay vertices, which may violate CP. Radiative corrections in the MSSM may also induce CP violation in Higgs-mass mixing, which can be probed via various asymmetries measurable using polarized mu+mu- beams. In addition, Higgs-chargino couplings may be probed at a second mu+mu- Higgs factory.
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