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Report number arXiv:1111.4183 ; CERN-PH-EP-2011-183 ; LHCB-PAPER-2011-012 ; CERN-PH-EP-2011-183 ; LHCB-PAPER-2011-012
Title First observation of the decay B0sK0¯¯¯¯¯K0
Related titleFirst observation of the decay B0s -> K*0 anti-K*0
Author(s) LHCb Collaboration  Mostrar todos os 586 autores
Affiliation (CERN)
Publication 2013-07-16
Imprint 18 Nov 2011
Number of pages 9
Note Comments: 9 pages, 4 figures, submitted to Phys. Lett. B
In: Phys. Lett. B 709 (2012) 50-58
DOI 10.1016/j.physletb.2012.02.001
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; LHCb
Free keywords flavor physics ; B physics ; branching fraction ; polarization ; experimental results
Abstract The first observation of the decay B0sK0¯¯¯¯¯K0 is reported using 35 pb1 of data collected by LHCb in proton-proton collisions at a centre-of-mass energy of 7 TeV. A total of 49.8±7.5 signal events are observed, with a significance of 10.9 sigma. The branching fraction and the CP-averaged K0 longitudinal polarization fraction are measured to be BF(B0sK0¯¯¯¯¯K0=(2.81±0.46(stat.)±0.45(syst.)±0.34(fs/fd))x105 and fL=0.31±0.12(stat.)±0.04(syst.).
Related document Supersedes LHCb-CONF-2011-019
Copyright/License publication: © 2012-2024 CERN (License: CC-BY-3.0)
preprint: © 2011-2024 CERN (License: CC-BY-3.0)



Corresponding record in: Inspire
Email contact: u.egede@imperial.ac.uk


 Record created 2011-11-17, last modified 2024-08-17


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