B→Xsγ in supersymmetry: large contributions beyond the leading order

By Giuseppe Degrassi, Paolo Gambino, G. Giudice. 2000

254 citations recorded by the source corpus.

We discuss possible large contributions to B→Xsγ, which can occur at the next-to-leading order in supersymmetric models. They can originate from terms enhanced by tan β factors, when the ratio between the two Higgs vacuum expectation values is large, or by logarithm of MSUSY/MW, when the supersymmetric particles are considerably heavier than the W boson. We give compact formulae which include all potentially large higher-order contributions. We find that tan β terms at the next-to-leading order do not only appear from the Hall-Rattazzi-Sarid effect (the modified relation between the bottom mass and Yukawa coupling), but also from an analogous effect in the top-quark Yukawa coupling. Finally, we show how next-to-leading order corrections, in the large tan β region, can significantly reduce the limit on the charged-Higgs mass, even if supersymmetric particles are very heavy.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/e8fcf0e37c2ae522f49bfc6ee3bc4a786bc83c0f

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In Nuclear and High Energy Physics

1. T. Hurth
2. G. Isidori
3. David M. Straub
4. Andrzej Buras
5. W. Altmannshofer
6. P. Paradisi
7. S. Descotes-Genon

Citations in the corpus

• The impact of priors and observables on parameter inferences in the constrained MSSM (2008, unknown): “[42, 43] which was extended in refs.”