Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/174604
Title: Updated measurement of decay-time-dependent CP asymmetries in D-0 -> K+ K- and D-0 -> pi(+)pi(-) decays
Author: Alfonso Albero, Alejandro
Calvo Gómez, Míriam
Camboni, Alessandro
Coquereau, Samuel
Garrido Beltrán, Lluís
Gascón Fora, David
Gironella Gironell, Pere
Graciani Díaz, Ricardo
Albrecht, J.
Alessio, F.
Alexander, M.
Alkhazov, G.
Cartelle, P. Alvarez
Alves, A. A., Jr.
Graugés Pous, Eugeni
Manera Escalero, R.
García Martín, L. M.
Sánchez Mayordomo, C.
Ruiz Vidal, J.
Remon Alepuz, C.
Oyanguren Campos, Arantza de
Martínez Vidal, F.
LHCb Collaboration
Keywords: Barions
Simetria (Física)
Violació CP (Física nuclear)
Baryons
Symmetry (Physics)
CP violation (Nuclear physics)
Issue Date: 13-Jan-2020
Publisher: American Physical Society
Abstract: A search for decay-time-dependent charge-parity (CP) asymmetry in D0→K+K− and D0→π+π− 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 D0 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 D0 and ¯D0 mesons are determined to be AΓ(K+K−)=(−4.3±3.6±0.5)×10−4 and AΓ(π+π−)=(2.2±7.0±0.8)×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 AΓ(K+K−)=(−4.4±2.3±0.6)×10−4 and AΓ(π+π−)=(2.5±4.3±0.7)×10−4.
Note: Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.101.012005
It is part of: Physical Review D, 2020, vol. 101, num. 1, p. 012005
URI: http://hdl.handle.net/2445/174604
Related resource: https://doi.org/10.1103/PhysRevD.101.012005
ISSN: 2470-0010
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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