We present a measurement of D-0-(D) over bar (0) mixing parameters using the ratios of lifetimes extracted from samples of D-0 mesons decaying to K(-)pi(+), K-K+, and pi(-)pi(+). Using 91 fb(-1) of data collected by the BABAR detector at the PEP-II asymmetric-energy B Factory, we obtain a value Y=[0.8+/-0.4(stat.)(-0.4)(+0.5)(syst.)]%, which, in the limit of CP conservation, corresponds to the mixing parameter y=DeltaGamma/2Gamma. Using the difference in lifetimes of D-0 and (D) over bar (0) mesons, we obtain the CP-violation parameter DeltaY=[-0.8+/-0.6(stat.)+/-0.2(syst.)]%.

Limits on D-0-(D)over-bar(0) mixing and CP violation from the ratio of lifetimes for decay to K-pi(+), K-K+, and pi(-)pi(+) RID C-2728-2008 RID C-5223-2009 RID C-5719-2008 RID D-1055-2009 RID A-2675-2009

LUSIANI, Alberto;
2003

Abstract

We present a measurement of D-0-(D) over bar (0) mixing parameters using the ratios of lifetimes extracted from samples of D-0 mesons decaying to K(-)pi(+), K-K+, and pi(-)pi(+). Using 91 fb(-1) of data collected by the BABAR detector at the PEP-II asymmetric-energy B Factory, we obtain a value Y=[0.8+/-0.4(stat.)(-0.4)(+0.5)(syst.)]%, which, in the limit of CP conservation, corresponds to the mixing parameter y=DeltaGamma/2Gamma. Using the difference in lifetimes of D-0 and (D) over bar (0) mesons, we obtain the CP-violation parameter DeltaY=[-0.8+/-0.6(stat.)+/-0.2(syst.)]%.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11384/4531
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