We present a measurement of D0−D⎯⎯⎯0 mixing and CP violation using the ratio of lifetimes simultaneously extracted from a sample of D0 mesons produced through the flavor-tagged process D*+→D0π+, where D0 decays to K∓π±, K−K+, or π−π+, along with the untagged decays D0→K∓π± and D0→K−K+. The lifetimes of the CP-even, Cabibbo-suppressed modes K−K+ and π−π+ are compared to that of the CP-mixed mode K∓π± in order to measure yCP and ΔY. We obtain yCP=[0.72±0.18(stat)±0.12(syst)]% and ΔY=[0.09±0.26(stat)±0.06(syst)]%, where ΔY constrains possible CP violation. The yCP result excludes the null mixing hypothesis at 3.3σ significance. This analysis is based on an integrated luminosity of 468  fb−1 collected with the BABAR detector at the PEP-II asymmetric-energy e+e− collider.

Lees, J.P., Poireau, V., Tisserand, V., Garra Tico, J., Grauges, E., Palano, A., et al. (2013). Measurement of D-0-(D)over-bar(0) mixing and CP violation in two-body D-0 decays. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 87(1), 1-12 [10.1103/PhysRevD.87.012004].

Measurement of D-0-(D)over-bar(0) mixing and CP violation in two-body D-0 decays

PATRIGNANI, CLAUDIA;
2013

Abstract

We present a measurement of D0−D⎯⎯⎯0 mixing and CP violation using the ratio of lifetimes simultaneously extracted from a sample of D0 mesons produced through the flavor-tagged process D*+→D0π+, where D0 decays to K∓π±, K−K+, or π−π+, along with the untagged decays D0→K∓π± and D0→K−K+. The lifetimes of the CP-even, Cabibbo-suppressed modes K−K+ and π−π+ are compared to that of the CP-mixed mode K∓π± in order to measure yCP and ΔY. We obtain yCP=[0.72±0.18(stat)±0.12(syst)]% and ΔY=[0.09±0.26(stat)±0.06(syst)]%, where ΔY constrains possible CP violation. The yCP result excludes the null mixing hypothesis at 3.3σ significance. This analysis is based on an integrated luminosity of 468  fb−1 collected with the BABAR detector at the PEP-II asymmetric-energy e+e− collider.
2013
Lees, J.P., Poireau, V., Tisserand, V., Garra Tico, J., Grauges, E., Palano, A., et al. (2013). Measurement of D-0-(D)over-bar(0) mixing and CP violation in two-body D-0 decays. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 87(1), 1-12 [10.1103/PhysRevD.87.012004].
Lees, J. P.; Poireau, V.; Tisserand, V.; Garra Tico, J.; Grauges, E.; Palano, A.; Eigen, G.; Stugu, B.; Brown, D. N.; Kerth, L. T.; Kolomensky, Yu G.;...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/537364
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