Asymmetries in the time-dependent rates of D0→K+K-and D0→π+π-decays are measured in a pp collision data sample collected with the LHCb detector during LHC Run 1, corresponding to an integrated luminosity of 3 fb-1. The asymmetries in effective decay widths between D0 and D-0 decays, sensitive to indirect CP violation, are measured to be AΓ(K+K-)=(-0.30±0.32±0.10)×10-3 and AΓ(π+π-)=(0.46±0.58±0.12)×10-3, where the first uncertainty is statistical and the second systematic. These measurements show no evidence for CP violation and improve on the precision of the previous best measurements by nearly a factor of two. © 2017 CERN.
Measurement of the CP Violation Parameter A Γ in D0 →k+K-and D0 →π+π-Decays
Adinolfi, M.;Alessio, F.;Barlow, R. J.;Battista, V.;Bedeschi, F.;Bowen, E.;Burr, C.;Campana, P.;Carboni, G.;Charles, M.;Coco, V.;Contu, A.;Di Canto, A.;Frank, M.;Gallorini, S.;Gandini, P.;Gascon, D.;Graverini, E.;Graziani, G.;He, J.;Lazzeroni, C.;Manca, G.;Marino, P.;Martin, M.;Morello, M. J.;Penso, G.;Perret, P.;Punzi, G.
;Rama, M.;Rotondo, M.;Sarti, A.;Satriano, C.;Satta, A.;Sergi, A.;Serrano, J.;Smith, J.;Smith, M.;Stracka, S.;Tomassetti, L.;Tonelli, D.;Vacca, C.;Valenti, G.;Veltri, M.;Vieira, D.;Wallace, R.;Wilkinson, G.;Xing, Z.;Yang, Z.;Zucchelli, S.
2017-01-01
Abstract
Asymmetries in the time-dependent rates of D0→K+K-and D0→π+π-decays are measured in a pp collision data sample collected with the LHCb detector during LHC Run 1, corresponding to an integrated luminosity of 3 fb-1. The asymmetries in effective decay widths between D0 and D-0 decays, sensitive to indirect CP violation, are measured to be AΓ(K+K-)=(-0.30±0.32±0.10)×10-3 and AΓ(π+π-)=(0.46±0.58±0.12)×10-3, where the first uncertainty is statistical and the second systematic. These measurements show no evidence for CP violation and improve on the precision of the previous best measurements by nearly a factor of two. © 2017 CERN.File in questo prodotto:
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