Signals of CP violation beyond the MSSM in Higgs and flavor physics

Journal Article · Tue Nov 01 00:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.84.095027· OSTI ID:21608068

Altmannshofer, Wolfgang ^[1]; Carena, Marcela ^[1]; Gori, Stefania ^[2]; Puente, Alejandro de la ^[1]

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1. Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510 (United States)
2. Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 (United States)

We study an extension of the Higgs sector of the minimal supersymmetric standard model (MSSM), considering the effects of new degrees of freedom at the TeV scale and allowing for sources of CP violation beyond the MSSM. We analyze the impact of the beyond-the-MSSM sources of CP violation on the Higgs collider phenomenology and on low energy flavor and CP-violating observables. We identify distinct Higgs collider signatures that cannot be realized, either in the case without CP-violating phases or in the CP-violating MSSM, and investigate the prospects to probe them at the Tevatron and the LHC. The most striking benchmark scenario has three neutral Higgs bosons that all decay dominantly into W boson pairs and that are well within the reach of the 7 TeV LHC run. On the other hand, we also present scenarios with three Higgs bosons that have masses M{sub H{sub i}} > or approx. 150 GeV and decay dominantly into bb. Such scenarios are much more challenging to probe and can even lie completely outside the reach of the 7 TeV LHC run. We explore complementary scenarios with standard MSSM Higgs signals that allow us to accommodate a nonstandard B{sub s} mixing phase as indicated by D0, as well as the excess in B{sub s}{yields}{mu}{sup +}{mu}{sup -} candidates recently reported by CDF. We find that, in contrast to the MSSM, a minimal flavor-violating soft sector is sufficient to generate significant corrections to CP-violating observables in meson mixing, compatible with Electric Dipole Moment constraints. In particular, a B{sub s} mixing phase S{sub {psi}{phi}} < or approx. 0.15 can be achieved for specific regions of parameter space, compatible with all the presently available experimental constraints on flavor observables. Such a nonstandard B{sub s} mixing phase would unambiguously imply a sizable suppression of S{sub {psi}}K{sub S} with respect to the standard model prediction and a BR(B{sub s}{yields}{mu}{sup +}{mu}{sup -}) close to its 95% C.L. upper bound of 1.1x10{sup -8}.

• OSTI ID: 21608068
• Journal Information: Physical Review. D, Particles Fields, Vol. 84, Issue 9; Other Information: DOI: 10.1103/PhysRevD.84.095027; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

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