2002/12/31 by Chao-Shang Huang, Xiao-Hong Wu
Physics and Astronomy · #Black Holes and Theoretical Physics #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1016/s0550-3213(03)00146-9
published as Nucl.Phys. B657 (2003) 304-332 · 23 pages, 6 figures, discussions about B^0_s - B^0_s bar mixing and dilepton spectra of B -> X_s mu^+ mu^- added, corrected some typos and references added, version to appear in Journal
arxiv created 2003/03/06 · openalex publication_date 2003/04/07 · arxiv updated 2009/11/30 · openalex created_date 2016/07/22 · openalex updated_date 2026/07/29
Pure leptonic and semileptonic rare B decays, Bs → μ+ μ- and B → Xs μ+ μ- in the minimal supersymmetric Standard Model (MSSM), in particular, gluino and neutralino contributions to the decays, are discussed under Br(B → Xs γ) and other experimental constraints . The general scalar quark mass matrices as the new sources of flavor violation are considered. We present Wilson coefficients of bs transitions from γ, Z, and neutral Higgs boson penguin diagrams by using vertex mixing method to deal with scalar down-type quark flavor changing and also give their expressions in MIA to show different sources of enhancements. We find that under the experimental constraints, with large mixing of left-handed and right-handed sbottom, C(′)10 can be enhanced by 10% compared with SM, in two cases, heavy gluino and fine-tuning between δdLL23(δdRR23) and δdLR23(δdRL23) terms in C(′)7. Particularly, C10 and C10′ can reach a 20% enhancement in some regions of parameters under experimental constraints. When CP-odd Higgs A0 is not too heavy (∼ 250GeV), and tanβ is large (∼ 40), neutral Higgs boson penguins with gluino and down-type squark in the loop can significantly contribute to the bs transition and the contributions can compete with those due to the chargino and up-type squark loop.