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Article
Report number arXiv:1308.1277 ; CERN-PH-EP-2013-147 ; LHCB-PAPER-2013-034 ; CERN-PH-EP-2013-147 ; LHCB-PAPER-2013-034
Title Branching fraction and CP asymmetry of the decays B+K0Sπ+ and B+K0SK+
Author(s) LHCb collaboration  657 人のオーサーを表示
Publication 2013-11-04
Imprint 07 Aug 2013
Number of pages 10
Note Comments: 13 pages, 2 figures
13 pages, 2 figures
In: Phys. Lett. B 726 (2013) 646-655
DOI 10.1016/j.physletb.2013.09.046
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; LHCb
Free keywords flavor physics ; B physics ; branching fraction ; CP violation
Abstract An analysis of B+K0Sπ+ and B+K0SK+ decays is performed with the LHCb experiment. The pp collision data used correspond to integrated luminosities of 1fb1 and 2fb1 collected at centre-of-mass energies of s=7TeV and s=8TeV, respectively. The ratio of branching fractions and the direct CP asymmetries are measured to be B(B+K0SK+)/B(B+K0Sπ+)=0.064±0.009 (stat.)±0.004 (syst.), ACP(B+K0Sπ+)=0.022±0.025 (stat.)±0.010 (syst.) and ACP(B+K0SK+)=0.21±0.14 (stat.)±0.01 (syst.). The data sample taken at s=7TeV is used to search for B+cK0SK+ decays and results in the upper limit (fcB(B+cK0SK+))/(fuB(B+K0Sπ+))<5.8×102 at 90% confidence level, where fc and fu denote the hadronisation fractions of a ˉb quark into a B+c or a B+ meson, respectively.
Copyright/License publication: © 2013-2024 CERN (License: CC-BY-3.0)
preprint: © 2013-2024 CERN (License: CC-BY-3.0)



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Email contact: lalaine.barbon.strebel@cern.ch


 レコード 生成: 2013-08-07, 最終変更: 2024-08-17


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