Higgs mediated electric dipole moments in the MSSM: An application to baryogenesis and Higgs searches - INSPIRE

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Higgs mediated electric dipole moments in the MSSM: An application to baryogenesis and Higgs searches

Apostolos Pilaftsis
(
- CERN and
- Manchester U.
)

Jul, 2002

34 pages

Published in:

Nucl.Phys.B 644 (2002) 263-289

e-Print:

hep-ph/0207277 [hep-ph]

DOI:

10.1016/S0550-3213(02)00826-X

Report number:

CERN-TH-2002-170,
MC-TH-2002-03

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Abstract:

We perform a comprehensive study of the dominant two- and higher-loop contributions to the

^{205}

Tl, neutron and muon electric dipole moments induced by Higgs bosons, third-generation quarks and squarks, charginos and gluinos in the Minimal Supersymmetric Standard Model (MSSM). We find that strong correlations exist among the contributing CP-violating operators, for large stop, gluino and chargino phases, and for a wide range of values of

\tan\beta

and charged Higgs-boson masses, giving rise to large suppressions of the

^{205}

Tl and neutron electric dipole moments below their present experimental limits. Based on this observation, we discuss the constraints that the non-observation of electric dipole moments imposes on the radiatively-generated CP-violating Higgs sector and on the mechanism of electroweak baryogenesis in the MSSM. We improve previously suggested benchmark scenarios of maximal CP violation for analyzing direct searches of CP-violating MSSM Higgs bosons at high-energy colliders, and stress the important complementary r\^ole that a possible high-sensitivity measurement of the muon electric dipole moment to the level of

10^{-24}

e

cm can play in such analyses.

Note:

34 pages, one reference added, version as to appear in Nuclear Physics B Report-no: CERN-TH/2002-170 and MC-TH-2002-03

11.30.Er
14.80.Er
n: electric moment
muon: electric moment
supersymmetry
Higgs particle: effect
sparticle: effect
electron nucleon: operator
CP: violation
atom: electric moment

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