2004/09/30 by H. Itoh, Hideo Itoh, Shinji Komine +2 · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Branching fraction #Electron #Gluino #Grand Unified Theory #Higgs boson #Lepton #Minimal Supersymmetric Standard Model #Neutralino #Neutrino Physics Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Standard Model (mathematical formulation) #Supersymmetry #Yukawa potential #hep-ph
paper · pdf · doi:10.1143/ptp.114.179
published as Prog.Theor.Phys. 114 (2005) 179-204 · 29 pages, 22 figures
arxiv created 2005/05/14 · openalex publication_date 2005/07/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study new physics effects on B decay processes including a final τ particle, namely B → Dτν and B → τν. An important feature of these processes is that a charged Higgs boson can contribute to the decay amplitude at the tree level in models such as Two Higgs Doublet Model and the Minimal Supersymmetric Standard Model (MSSM). We derive a resummed effective Lagrangian for charged-Higgs mediated interactions in the MSSM with the Minimal Flavor Violation. Including supersymmetric (SUSY) loop corrections for down-type-quark and charged-lepton Yukawa couplings, we calculate the branching ratios of the B → Dτν and B → τν processes. We find that SUSY correction due to gluino-sbottom diagrams can change the Higgs exchange contribution by ±50%, whereas stau-neutralino diagrams can make corrections up to 20%. We also discuss relationship between SUSY corrections in the tauonic decays and flavor changing neutral current processes such as Bs → µ+µ− and b → sγ.