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Report number arXiv:1905.06662 ; LHCb-PAPER-2019-004 ; CERN-EP-2019-063 ; LHCB-PAPER-2019-004
Title Amplitude analysis of the B(s)0K0K¯0 decays and measurement of the branching fraction of the B0K0K¯0 decay
Author(s) LHCb Collaboration  Visualizza tutti i 848 autori
Publication 2019-07-05
Imprint 16 May 2019
Number of pages 31
Note All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2019-004.html (LHCb public pages)
In: JHEP 1907 (2019) pp.032
DOI 10.1007/JHEP07(2019)032
10.1007/JHEP07(2019)032 (publication)
Subject category Particle Physics - Experiment ; hep-ex
Accelerator/Facility, Experiment CERN LHC ; LHCb
Free keywords flavor physics ; B physics ; polarization
Abstract The B0K0K¯0 and Bs0K0K¯0 decays are studied using proton-proton collision data corresponding to an integrated luminosity of 3fb1. An untagged and time-integrated amplitude analysis of B(s)0(K+π)(Kπ+) decays in two-body invariant mass regions of 150 MeV/c2 around the K0 mass is performed. A stronger longitudinal polarisation fraction in the B0K0K¯0 decay, fL=0.724±0.051(stat)±0.016(syst), is observed as compared to fL=0.240±0.031(stat)±0.025(syst) in the Bs0K0K¯0 decay. The ratio of branching fractions of the two decays is measured and used to determine B(B0K0K¯0)=(8.0±0.9(stat)±0.4(syst))×107.
Copyright/License publication: (License: CC-BY-4.0)
Preprint: © 2019-2024 CERN (License: CC-BY-4.0)



Corresponding record in: Inspire
Email contact: nathalie.grub@cern.ch


 Record creato 2019-05-16, modificato l'ultima volta il 2024-10-02


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