Measurements of the S-wave fraction in B<SUP>0</SUP> → K<SUP>+</SUP> π<SUP>-</SUP> μ<SUP>+</SUP> μ<SUP>-</SUP> decays and the B<SUP>0</SUP> → K*(892)<SUP>0</SUP> μ<SUP>+</SUP> μ<SUP>-</SUP> differential branching fraction



Aaij, R, Adeva, B, Adinolfi, M, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G
et al (show 724 more authors) (2016) Measurements of the S-wave fraction in B<SUP>0</SUP> → K<SUP>+</SUP> π<SUP>-</SUP> μ<SUP>+</SUP> μ<SUP>-</SUP> decays and the B<SUP>0</SUP> → K*(892)<SUP>0</SUP> μ<SUP>+</SUP> μ<SUP>-</SUP> differential branching fraction. JOURNAL OF HIGH ENERGY PHYSICS, 2016 (11). 47-. ISSN 1029-8479, 1029-8479

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Abstract

A measurement of the differential branching fraction of the decay B<sup>0</sup> → K<sup>∗</sup>(892)<sup>0</sup>μ<sup>+</sup>μ<sup>−</sup> is presented together with a determination of the S-wave fraction of the K<sup>+</sup>π<sup>−</sup> system in the decay B<sup>0</sup> → K<sup>+</sup>π<sup>−</sup>μ<sup>+</sup>μ<sup>−</sup>. The analysis is based on pp-collision data corresponding to an integrated luminosity of 3 fb<sup>−1</sup> collected with the LHCb experiment. The measurements are made in bins of the invariant mass squared of the dimuon system, q<sup>2</sup>. Precise theoretical predictions for the differential branching fraction of B<sup>0</sup> → K<sup>∗</sup>(892)<sup>0</sup>μ<sup>+</sup>μ<sup>−</sup> decays are available for the q<sup>2</sup> region 1.1 < q<sup>2</sup>< 6.0 GeV<sup>2</sup>/c<sup>4</sup>. In this q<sup>2</sup> region, for the K<sup>+</sup>π<sup>−</sup> invariant mass range 796 < m<inf>Kπ</inf>< 996 MeV/c<sup>2</sup>, the S-wave fraction of the K<sup>+</sup>π<sup>−</sup> system in B<sup>0</sup> → K<sup>+</sup>π<sup>−</sup>μ<sup>+</sup>μ<sup>−</sup> decays is found to be F<inf>S</inf>=0.101±0.017(stat)±0.009(syst), and the differential branching fraction of B<sup>0</sup> → K<sup>∗</sup>(892)<sup>0</sup>μ<sup>+</sup>μ<sup>−</sup> decays is determined to be dℬ/dq<sup>2</sup>=(0.392<inf>−0.019</inf><sup>+0.020</sup>(stat)±0.010(syst)±0.027(norm))×10<sup>−7</sup>c<sup>4</sup>/GeV<sup>2</sup>. The differential branching fraction measurements presented are the most precise to date and are found to be in agreement with Standard Model predictions.

Item Type: Article
Uncontrolled Keywords: B physics, Hadron-Hadron scattering (experiments), Rare decay
Depositing User: Symplectic Admin
Date Deposited: 01 Dec 2016 11:34
Last Modified: 05 Aug 2025 08:44
DOI: 10.1007/JHEP11(2016)047
Open Access URL: https://arxiv.org/abs/1606.04731v1
Related Websites:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3004716