Title:
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First Observation of CP Violation in the Decays of B0s Mesons
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Author:
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Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN
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Other authors:
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Universitat Ramon Llull. La Salle; CERN |
Abstract:
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Using pp collision data corresponding to an integrated luminosity of 1.0 fb−1 and collected by LHCb in 2011 at a center-of-mass energy of 7 TeV, we report the measurement of direct CP violation in B0s→K−π+ decays, ACP(B0s→K−π+)=0.27±0.04 (stat)±0.01 (syst), with significance exceeding 5 standard deviations. This is the first observation of CP violation in the decays of B0s mesons. Furthermore, we provide an improved determination of direct CP violation in B0→K+π− decays, ACP(B0→K+π−)=−0.080±0.007 (stat)±0.003 (syst), which is the most precise measurement of this quantity to date. |
Publication date:
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2013-05-30 |
Subject (UDC):
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53 - Física |
Subject(s):
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Gran col·lisionador d'hadrons (França i Suïssa) Partícules (Física nuclear) Mesons |
Rights:
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L'accés als continguts d'aquest document queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons:http://creativecommons.org/licenses/by/4.0/
© CERN |
Pages:
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9 p. |
Document type:
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Article Article - Published version |
DOI:
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https://doi.org/10.1103/PhysRevLett.110.221601
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Published by:
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American Physical Society
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Publish at:
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Physical Review Letters, 2013, Vol. 110, No. 22 (Maig)
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