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Aaij, R.; Amhis, Y.; Barsuk, S.; Borsato, M.; Kochebina, O.; Lefrançois, J.; Machefert, F.; Sanchez, A. Martin; Nicol, M.; Robbe, P.; Schune, M.-H.; Teklishyn, M.; Vallier, A.; Viaud, B.; Beaucourt, L.; Chefdeville, M.; Decamp, D.; Déléage, N.; Ghez, Ph; Lees, J.-P.; Marchand, J.F.; Minard, M.-N.; Pietrzyk, B.; Qian, W.; t'Jampens, S.; Tisserand, V.; Tournefier, E.
The journal of high energy physics, 2015, Letnik: 2015, Številka: 4Journal Article
Time-dependent CP asymmetries in the decay rates of the singly Cabibbo-suppressed decays D0→K−K+ and D0→π−π+ are measured in pp collision data corresponding to an integrated luminosity of 3.0 fb−1 collected by the LHCb experiment. The D0 mesons are produced in semileptonic b-hadron decays, where the charge of the accompanying muon is used to determine the initial state as D0 or D¯0. The asymmetries in effective lifetimes between D0 and D¯0 decays, which are sensitive to indirect CP violation, are determined to beAΓ(K−K+)=(−0.134±0.077+0.026−0.034)% ,AΓ(π−π+)=(−0.092±0.145+0.025−0.033)% ,where the first uncertainties are statistical and the second systematic. This result is in agreement with previous measurements and with the hypothesis of no indirect CP violation in D0 decays.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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