The role of long distance contribution to the $B\to K^{(\ast )}{\ell }^{+}{\ell }^{-}$ in the Standard Model

Abstract

We investigate rare semileptonic $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$ by looking at the long distance contributions. Our analysis is limited to the very small values of physical accessible range of invariant mass of the leptonic couple $q^2$. We show that the light quarks loop has to be accounted for, along with the charming penguin contribution, in order to accurately compute the $q^2$-spectrum in the Standard Model. Such a long distance contribution may also play a role in the analysis of the lepton flavour universality violation in this process.

12 pages, 7 figures, 1 table

References in corpus (2)

• Penguins with Charm and Quark-Hadron Duality
• On the radiative decays of light vector and axial-vector mesons

Cited by in corpus (2)

• Anomalous thresholds in $B\to (P,V){\gamma }^{\ast }$ form factors
• Insights on the current semi-leptonic $B$-decay discrepancies -- and how $B_s\to {\mu }^{+}{\mu }^{-}\gamma$ can help