TY - JOUR AU - LHCb Collaboration (Aaij, R. et al AU - Garcia Martin, L. M. AU - Henry, L. AU - Jashal, B. K. AU - Martinez-Vidal, F. AU - Oyanguren, A. AU - Remon Alepuz, C. AU - Ruiz Vidal, J. AU - Sanchez Mayordomo, C. PY - 2020 DA - 2020// TI - (U)pdated measurement of decay-time-dependent CP asymmetries in D-0 -> K+ K- and D-0 -> pi(+)pi(-) decays T2 - Phys. Rev. D JO - Physical Review D SP - 012005 EP - 12pp VL - 101 IS - 1 PB - Amer Physical Soc AB - A search for decay-time-dependent charge-parity (CP) asymmetry in D-0 -> K+ K- and D-0 -> pi(+)pi(-) eff decays is performed at the LHCb experiment using proton-proton collision data recorded at a center-of-mass energy of 13 TeV, and corresponding to an integrated luminosity of 5.4 fb(-1). The D-0 mesons are required to originate from semileptonic decays of b hadrons, such that the charge of the muon identifies the flavor of the neutral D meson at production. The asymmetries in the effective decay widths of D-0 and (D) over bar (0) mesons are determined to be A(Gamma)(K+ K-) = (-4.3 +/- 3.6 +/- 0.5) x 10(-4) and A(Gamma) (K+ K- ) = (2.2 +/- 7.0 +/- 0.8) x 10(-4), where the uncertainties are statistical and systematic, respectively. The results are consistent with CP symmetry and, when combined with previous LHCb results, yield A(Gamma) (K+ K-) = (-4.4 +/- 2.3 +/- 0.6) x 10(-4) and A(Gamma) (pi(+)pi(-))= (2.5 +/- 4.3 +/- 0.7) x 10(-4). SN - 2470-0010 UR - https://arxiv.org/abs/1911.01114 UR - https://doi.org/10.1103/PhysRevD.101.012005 DO - 10.1103/PhysRevD.101.012005 LA - English N1 - WOS:000506845800002 ID - LHCbCollaborationAaij_etal2020 ER -