An empirical model to determine the hadronic resonance contributions B¯0→K¯∗0μ+μ- to transitions

T. Blake, U. Egede, P. Owen, K. A. Petridis, G. Pomery

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Abstract

A method for analysing the hadronic resonance contributions in B¯0→K¯∗0μ+μ- decays is presented. This method uses an empirical model that relies on measurements of the branching fractions and polarisation amplitudes of final states involving JPC= 1 - - resonances, relative to the short-distance component, across the full dimuon mass spectrum of B¯0→K¯∗0μ+μ- transitions. The model is in good agreement with existing calculations of hadronic non-local effects. The effect of this contribution to the angular observables is presented and it is demonstrated how the narrow resonances in the q2 spectrum provide a dramatic enhancement to CP-violating effects in the short-distance amplitude. Finally, a study of the hadronic resonance effects on lepton universality ratios, RK(∗), in the presence of new physics is presented.

Original languageEnglish
Article number453
Number of pages13
JournalEuropean Physical Journal C
Volume78
Issue number6
DOIs
Publication statusPublished - 1 Jun 2018
Externally publishedYes

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