New Higgs effects in B-physics in supersymmetry with general flavour mixing

John Foster, Ken Ichi Okumura, Leszek Roszkowski

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)


We investigate the effect of general flavour mixing among squarks on the rare decays B̄→Xsγ, B̄s→μ+μ- and B̄s-Bs mixing beyond the leading order in perturbation theory. We include all large tanβ-enhanced corrections whilst also taking into account the effects of general flavour mixing on the uncorrected quark mass matrix and SU(2)L×U(1)Y breaking. For B̄s→μ+μ- and B̄s-Bs mixing we find that, in analogy to B̄→Xsγ, there appears a focusing effect which can reduce the contribution due to the δRR (and the δLL) insertion by up to a factor of two at large tanβ and μ>0. A dependence on δLR and δRL, that otherwise cancels to first order in the mass insertion approximation, is also reintroduced. Taking into account the current experimental bounds on ΔMBs and BR(B̄s→μ+μ-), we find that the insertions δRL and δRR can be significantly constrained compared to bounds obtained from B̄→Xsγ only.

Original languageEnglish
Pages (from-to)102-110
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
Publication statusPublished - Mar 3 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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