Phase effect of a general two-Higgs-doublet model inb→sγ

1998/11/03 by David Bowser-Chao, Kingman Cheung, Wai-Yee Keung · 4 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1103/physrevd.59.115006

published as Phys.Rev.D59:115006,1999 · LaTeX 17 pages, 3 figures

arxiv created 1998/11/03 · openalex publication_date 1999/04/30 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

In a general two-Higgs-doublet model (2HDM), without the ad hoc discrete symmetries to prevent tree-level flavor-changing-neutral currents, an extra phase angle in the charged-Higgs-fermion coupling is allowed. We show that the charged-Higgs amplitude interferes destructively or constructively with the standard model amplitude for \stackrel\ensuremath→bs\ensuremathγ depending crucially on this phase angle. The popular models I and II are special cases of our analysis. As a result of this phase angle the severe constraint on the charged-Higgs-boson mass imposed by the inclusive rate of \stackrel\ensuremath→bs\ensuremathγ from CLEO can be relaxed. We also examine the effects of this phase angle on the neutron electric dipole moment. Furthermore, we also discuss other constraints on the charged-Higgs-fermion couplings coming from measurements of B⁰\ensuremath-B⁰ mixing, \ensuremathρ₀, and R_b.

Citations

• Implications ofb→sγDecay Measurements in Testing the Higgs Sector of the Minimum Supersymmetric Standard Model
• Effects of Superheavy Quarks and Leptons in Low-Energy Weak Processes KL-> Formula, K+-> + Formula and K0 Formula0
• CP-Violation in the Renormalizable Theory of Weak Interaction

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• CharmlessB→PV,VVdecays and new physics effects in the minimal supergravity model