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Title: | Measurement of CP violation in B-0 -> D+D- decays |
Author: | Graciani Díaz, Ricardo Graugés Pous, Eugeni Rives Molina, Vicente José Picatoste Olloqui, Eduardo Vilasis-Cardona, Xavier LHCb Collaboration |
Keywords: | Gran Col·lisionador d'Hadrons Mesons (Física nuclear) Violació CP (Física nuclear) Large Hadron Collider (France and Switzerland) Mesons (Nuclear physics) CP violation (Nuclear physics) |
Issue Date: | 23-Dec-2016 |
Publisher: | American Physical Society |
Abstract: | The CP violation observables S and C in the decay channel B-0 -> D+D- are determined from a sample of proton-proton collisions at center-of-mass energies of 7 and 8 TeV, collected by the LHCb experiment and corresponding to an integrated luminosity of 3 fb(-1). The observable S describes CP violation in the interference between mixing and the decay amplitude, and C parametrizes direct CP violation in the decay. The following values are obtained from a flavor-tagged, decay-time-dependent analysis: S = -0.54(-0.16)(+0.17) (stat) +/- 0.05(syst) ,C=0.26(-0.17)(+0.18) (stat) +/- 0.02(syst). These values provide evidence for CP violation at a significance level of 4.0 standard deviations. The phase shift due to higher-order standard model corrections is constrained to a small value of Delta phi = -0.16(-0.21)(+0.19) rad. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.117.261801 |
It is part of: | Physical Review Letters, 2016, vol. 117, num. 26, p. 261801 |
URI: | http://hdl.handle.net/2445/114425 |
Related resource: | https://doi.org/10.1103/PhysRevLett.117.261801 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) Publicacions de projectes de recerca finançats per la UE |
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