Measurement of the CP-Violating Phase ϕ[subscript s] in [bar over B][0 over s] → D[+ over s]D[- over s] Decays
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PhysRevLett.113.211801.pdf
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Author(s)
Aaij, R.
Abellán Beteta, C.
Adeva, B.
Adinolfi, M.
Affolder, A.
Ajaltouni, Z.
Akar, S.
Albrecht, J.
Alessio, F.
Alexander, M.
Date Issued
November 2014
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaij, R., C. Abellan Beteta, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, et al. “Measurement of the CP-Violating Phase ϕ[subscript s] in [bar over B][0 over s] → D[+ over s]D[- over s] Decays.” Physical Review Letters 113, no. 21 (November 2014). © 2014 CERN, for the LHCb Collaboration
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Final published version
Abstract
We present a measurement of the CP-violating weak mixing phase ϕ[subscript s] using the decay [bar over B][0 over s] → D[+ over s]D[- over s] in a data sample corresponding to 3.0 fb[superscript -1] of integrated luminosity collected with the LHCb detector in pp collisions at center-of-mass energies of 7 and 8 TeV. An analysis of the time evolution of the system, which does not use the constraint |λ| = 1 to allow for the presence of CP violation in decay, yields ϕ[subscript s] = 0.02 ± 0.17(stat) ± 0.02(syst) rad, |λ| = 0.91[+0.18 over -0.15](stat) ± 0.02(syst). This result is consistent with the standard model expectation.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.113.211801
