$\bar B\to X_s γ$ with a warped bulk Higgs
arXiv:1509.04643 · doi:10.1016/j.nuclphysb.2015.11.014
Abstract
We study the decay $\bar B\to X_sγ$ in Randall-Sundrum models with an IR-localised bulk Higgs. The two models under consideration are a minimal model as well as a model with a custodial protection mechanism. We include the effects of tree- and one-loop diagrams involving 5D gluon and Higgs exchanges as well as QCD corrections arising from the evolution from the Kaluza-Klein scale to the typical scale of the decay. We find the RS corrections to the branching fraction can be sizeable for large Yukawas and moderate KK scales $T$; for small Yukawas the RS contribution is small enough to be invisible in current experimental data.
20 pages, 5 figures(V2: references added, matches version published in Nuclear Physics B)