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An empirical model to determine the hadronic resonance contributions to $\overline{B}{}^0 \to \overline{K}{} ^{*0} \mu ^+ \mu^-$ transitions


Blake, T; Egede, U; Owen, P; Petridis, K A; Pomery, G (2018). An empirical model to determine the hadronic resonance contributions to $\overline{B}{}^0 \to \overline{K}{} ^{*0} \mu ^+ \mu^-$ transitions. European Physical Journal C - Particles and Fields, 78(6):453.

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.

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.

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Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Scopus Subject Areas:Physical Sciences > Engineering (miscellaneous)
Physical Sciences > Physics and Astronomy (miscellaneous)
Uncontrolled Keywords:Physics and Astronomy (miscellaneous), Engineering (miscellaneous)
Language:English
Date:1 June 2018
Deposited On:30 Nov 2018 15:45
Last Modified:15 Apr 2020 21:53
Publisher:Springer
ISSN:1434-6044
OA Status:Gold
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1140/epjc/s10052-018-5937-3

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