[MRO] First Observation of CP Violation in the Decays of B[superscript 0 over s] Mesons
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Aaij-2013-First Observation of CP Violation in the Decays of.pdf
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Author(s)
Williams, Michael
Date Issued
May 2013
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaij, R., C. Abellan Beteta, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, et al. “First Observation of CP Violation in the Decays of B[superscript 0 over s] Mesons.” Physical Review Letters 110, no. 22 (May 2013). © 2013 CERN
Version
Final published version
Abstract
Using pp collision data corresponding to an integrated luminosity of 1.0 fb[superscript -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 Bs0→K[superscript -]π[superscript +] decays, A[subscript CP](B[superscript 0 over s]→K[superscript -]π[superscript +])=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 B[superscript 0 over s] mesons. Furthermore, we provide an improved determination of direct CP violation in B[superscript 0]→K[superscript +]π[superscript -] decays, A[subscript CP](B[superscript 0]→K[superscript +]π[superscript -])=-0.080±0.007 (stat)±0.003 (syst), which is the most precise measurement of this quantity to date.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution 3.0
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.110.221601
