Higgs Boson Couplings to Bottom Quarks: Two-Loop Supersymmetry-QCD Corrections

Journal Article · Fri Oct 31 04:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.101.181801· OSTI ID:21179860

Noth, David; Spira, Michael ^[1]

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1. Paul Scherrer Institut, CH-5232 Villigen PSI (Switzerland)

We present two-loop supersymmetry (SUSY) QCD corrections to the effective bottom Yukawa couplings within the minimal supersymmetric extension of the standard model (MSSM). The effective Yukawa couplings include the resummation of the nondecoupling corrections {delta}m{sub b} for large values of tan{beta}. We have derived the two-loop SUSY-QCD corrections to the leading SUSY-QCD and top-quark-induced SUSY-electroweak contributions to {delta}m{sub b}. The scale dependence of the resummed Yukawa couplings is reduced from O(10%) to the percent level. These results reduce the theoretical uncertainties of the MSSM Higgs branching ratios to the accuracy which can be achieved at a future linear e{sup +}e{sup -} collider.

• OSTI ID: 21179860
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 18 Vol. 101; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B QUARKS
BRANCHING RATIO
HIGGS BOSONS
HIGGS MODEL
QUANTUM CHROMODYNAMICS
STANDARD MODEL
SUPERSYMMETRY
T QUARKS