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-.

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Abstract

A measurement of the differential branching fraction of the decay B0 → K∗(892)0μ+μ− is presented together with a determination of the S-wave fraction of the K+π− system in the decay B0 → K+π−μ+μ−. The analysis is based on pp-collision data corresponding to an integrated luminosity of 3 fb−1 collected with the LHCb experiment. The measurements are made in bins of the invariant mass squared of the dimuon system, q2. Precise theoretical predictions for the differential branching fraction of B0 → K∗(892)0μ+μ− decays are available for the q2 region 1.1 < q2< 6.0 GeV2/c4. In this q2 region, for the K+π− invariant mass range 796 < mKπ< 996 MeV/c2, the S-wave fraction of the K+π− system in B0 → K+π−μ+μ− decays is found to be FS=0.101±0.017(stat)±0.009(syst), and the differential branching fraction of B0 → K∗(892)0μ+μ− decays is determined to be dℬ/dq2=(0.392−0.019+0.020(stat)±0.010(syst)±0.027(norm))×10−7c4/GeV2. 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: 15 Mar 2024 00:17
DOI: 10.1007/JHEP11(2016)047
Open Access URL: https://arxiv.org/abs/1606.04731v1
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3004716