Abstract
Higgs singlet superflelds, usually present in extensions of the Minimal Supersymmetric Standard Model (MSSM) which address the μ‐problem, such as the Next‐to‐Minimal Supersymmetric Standard Model (NMSSM) and the Minimal Nonminimal Supersymmetric Standard Model (mnSSM), can have significant contributions to B‐meson flavour‐changing neutral current observables for large values of tanβ≳50. Illustrative results are presented including effects on the Bs and on the rare decay Bs→μ+μ−. In particular, we find that in the NMSSM, the branching ratio for Bs→μ+μ− can be enhanced or even suppressed with respect to the Standard Model prediction by more than one order of magnitude.
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