Supersymmetric Higgs sector and B-(B)over-bar mixing for large tan β

被引：40

作者：

Gorbahn, Martin ^{[1
]}

Jaeger, Sebastian ^{[2
]}

Nierste, Ulrich ^{[3
]}

Trine, Stephanie ^{[3
]}

机构：

[1] Tech Univ Munich, Inst Adv Study, D-85748 Garching, Germany

[2] Univ Sussex, Dept Phys & Astron, Brighton BN1 9QH, E Sussex, England

[3] Univ Karlsruhe, Karlsruhe Inst Technol, Inst Theoret Teilchenphys, D-76128 Karlsruhe, Germany

来源：

PHYSICAL REVIEW D | 2011年 / 84卷 / 03期

关键词：

LEADING QCD CORRECTIONS; SYMMETRY-BREAKING; RADIATIVE-CORRECTIONS; UNITARITY TRIANGLE; STANDARD MODEL; MSSM; RENORMALIZATION; BOSON; MASS; DECAY;

D O I：

10.1103/PhysRevD.84.034030

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We match the Higgs sector of the most general flavor-breaking and CP-violating minimal supersymmetric standard model (MSSM) onto a generic two-Higgs-doublet model, paying special attention to the definition of tan beta in the effective theory. In particular, no tan beta-enhanced loop corrections appear in the relation to tan beta defined in the (DR) over bar scheme in the MSSM. The corrections to the Higgs-mediated flavor-changing amplitudes, which result from this matching, are especially relevant for the B-d and B-s mass differences Delta M-d,M-s for minimal flavor violation, where the superficially leading contribution vanishes. We give a symmetry argument to explain this cancellation and perform a systematic study of all Higgs-mediated effects, including Higgs loops. The corrections to Delta M-s are at most 7% for mu > 0 and M-A < 600 GeV if constraints from other observables are taken into account. For mu < 0 they can be larger, but are always less than about 20%. Contrary to recent claims, we do not find numerically large contributions here, nor do we find any tan beta-enhanced contributions from loop corrections to the Higgs potential in B+ -> tau(+)nu or B -> X-s gamma. We further update supersymmetric loop corrections to the Yukawa couplings, where we include all possible CP-violating phases and correct errors in the literature. The possible presence of CP-violating phases generated by Higgs exchange diagrams is briefly discussed as well. Finally, we provide improved values for the bag factors P-1(VLL), P-2(LR), and P-1(SLL) at the electroweak scale.

引用

页数：34

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