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Measurement of Partial Widths and Search for Direct CP Violation in D0 Meson Decays to KK+ and ππ+

CollaborationWith : Campanelli, Mario / Clark, Allan Geoffrey / Donega, Mauro / D'Onofrio, Monica / Liu, Yanwen / Wu, Xin / Zsenei, Andras
Published in Physical Review Letters. 2005, vol. 94, no. 12, p. 122001
Abstract We present a measurement of relative partial widths and decay rate CP asymmetries in K−K+ and π−π+ decays of D0 mesons produced in pp collisions at s√=1.96  TeV. We use a sample of 2×105 D*+→D0π+ (and charge conjugate) decays with the D0 decaying to K−π+, K−K+, and π−π+, corresponding to 123  pb−1 of data collected by the Collider Detector at Fermilab II experiment at the Fermilab Tevatron collider. No significant direct CP violation is observed. We measure Γ(D0→K−K+)/Γ(D0→K−π+)=0.0992±0.0011±0.0012, Γ(D0→π−π+)/Γ(D0→K−π+)=0.035 94±0.000 54±0.000 40, ACP(K−K+)=(2.0±1.2±0.6)%, and ACP(π−π+)=(1.0±1.3±0.6)%, where, in all cases, the first uncertainty is statistical and the second is systematic.
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CDF COLLABORATION. Measurement of Partial Widths and Search for Direct CP Violation in D0 Meson Decays to KK+ and ππ+. In: Physical Review Letters, 2005, vol. 94, n° 12, p. 122001. https://archive-ouverte.unige.ch/unige:38097

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Deposited on : 2014-06-24

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