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Article
Report number arXiv:1408.2748 ; LHCB-PAPER-2014-041 ; CERN-PH-EP-2014-202 ; LHCB-PAPER-2014-041 ; CERN-PH-EP-2014-202
Title Measurement of the CKM angle γ using B±DK± with DKS0π+π,KS0K+K decays
Author(s) LHCb Collaboration  Показать всех 703 авторов
Publication 2014-10-16
Imprint 13 Aug 2014
Number of pages 32
In: JHEP 10 (2014) 097
DOI 10.1007/JHEP10(2014)097
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; LHCb
Free keywords flavor physics ; B physics ; CP violation ; CKM angle gamma
Abstract A binned Dalitz plot analysis of B±DK± decays, with DKS0π+π and DKS0K+K, is performed to measure the CP-violating observables x± and y±, which are sensitive to the Cabibbo-Kobayashi-Maskawa angle γ. The analysis exploits a sample of proton-proton collision data corresponding to 3.0 fb1 collected by the LHCb experiment. Measurements from CLEO-c of the variation of the strong-interaction phase of the D decay over the Dalitz plot are used as inputs. The values of the parameters are found to be x+=(7.7±2.4±1.0±0.4)×102, x=(2.5±2.5±1.0±0.5)×102, y+=(2.2±2.5±0.4±1.0)×102, and y=(7.5±2.9±0.5±1.4)×102. The first, second, and third uncertainties are the statistical, the experimental systematic, and that associated with the precision of the strong-phase parameters. These are the most precise measurements of these observables and correspond to γ=(6214+15), with a second solution at γγ+180, and rB=0.0800.021+0.019, where rB is the ratio between the suppressed and favoured B decay amplitudes.
Related document superseded by: CERN-EP-2020-175
Copyright/License publication: © 2014-2025 CERN (License: CC-BY-4.0), sponsored by SCOAP³
preprint: © 2014-2025 CERN (License: CC-BY-4.0)



Corresponding record in: Inspire
Email contact: carnita.hervet@cern.ch


 Запись создана 2014-08-13, последняя модификация 2024-08-17


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