4,217 research outputs found
Probing Higgs-sector CP Violation at a Photon Collider
In this review we demonstrate physics potential of a photon linear collider
by studying the neutral Higgs-boson sector of the MSSM in which interesting
CP-violating Higgs mixing could arise via radiative corrections.Comment: 18 pages, 8 figures, 1 table, invited article by Modern Physics
Letters A (review section), added reference
Addendum to ``Threshold corrections to and the production in CP-violating SUSY scenarios''
In hep-ph/0401024: ``Threshold corrections to and the production in CP-violating SUSY scenarios'', we have pointed out that
the production cross sections of the three neutral Higgs bosons through
fusion can deviate substantially from those obtained in CP
conserving scenarios, thanks to the nontrivial role played by the threshold
corrections to combined with the CP-violating mixing in the
neutral-Higgs-boson sector. The deviations are largest for values of the
CP-violating phases that maximize the mixing among at least two of the three
neutral Higgs bosons. We complement our previous work focussing explicitly on
the values of masses and widths of the three neutral Higgs bosons in this
region of parameter space. We then address the issue of whether the three
different peaks in the invariant mass distribution of the Higgs-decay products
can be experimentally disentangled at the LHC.Comment: 1+6 pages, 3 figure
Electric Dipole Moments in the MSSM Reloaded
We present a detailed study of the Thallium, neutron, Mercury and deuteron
electric dipole moments (EDMs) in the CP-violating Minimal Supersymmetric
extension of the Standard Model (MSSM). We take into account the complete set
of one-loop graphs, the dominant Higgs-mediated two-loop diagrams, the complete
CP-odd dimension-six Weinberg operator and the Higgs-mediated four-fermion
operators. We improve upon earlier calculations by including the resummation
effects due to CP-violating Higgs-boson mixing and to threshold corrections to
the Yukawa couplings of all up- and down-type quarks and charged leptons. As an
application of our study, we analyse the EDM constraints on the CPX, trimixing
and Maximally CP- and Minimally Flavour-Violating (MCPMFV) scenarios.
Cancellations may occur among the CP-violating contributions to the three
measured EDMs arising from the 6 CP-violating phases in the MCPMFV scenario,
leaving open the possibility of relatively large contributions to other
CP-violating observables. The analytic expressions for the EDMs are implemented
in an updated version of the code CPsuperH2.0.Comment: 61 pages, 28 figures, references added, to appear in JHEP, the
overall sign of Eq.(3.17) corrected, some details of numerical results
slightly changed, one more reference added, Eqs.(3.13) and (3.17) correcte
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