Updated measurement of decay-time-dependent CP asymmetries in D0→K+K− and D0→π+π− decays
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...
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
13 January 2020
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| In: |
Physical review
Year: 2020, Volume: 101, Issue: 1 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.101.012005 |
| Online Access: | Verlag, Volltext: https://doi.org/10.1103/PhysRevD.101.012005 Verlag: https://link.aps.org/doi/10.1103/PhysRevD.101.012005 
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| Author Notes: | R. Aaij et al (LHCb Collaboration)* |
MARC
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| 245 | 1 | 0 | |a Updated measurement of decay-time-dependent CP asymmetries in D0→K+K− and D0→π+π− decays |c R. Aaij et al (LHCb Collaboration)* |
| 246 | 3 | 3 | |a Updated measurement of decay-time-dependent CP asymmetries in D 0 → K + K − and D 0 → pi + pi − decays |
| 264 | 1 | |c 13 January 2020 | |
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| 500 | |a Gesehen am 21.02.2020 | ||
| 500 | |a *LHCb Collaboration: R. Aaij, F. Archilli, P. D'Argent, S. Bachmann, D. Berninghoff, M. Borsato, A. Comerma-Montells, M. Dziewiecki, D. Gerick, J.P. Grabowski, X. Han, S. Hansmann-Menzemer, J. Hu, M. Kecke, R. Kopecna, B. Leverington, H. Malygina, J. Marks, S. Neubert, A. Piucci, N. Skidmore, S. Stemmle, U. Uwer, A. Zhelezov [und 891 weitere Personen] | ||
| 500 | |a Im Titel sind die Zahl "0" und das Zeichen "+" und "-" hochgestellt | ||
| 520 | |a 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. | ||
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