We report a direct measurement of D0-D0 mixing parameters through a time-dependent amplitude analysis of the Dalitz plots of D(0) K(S)(0) + - and, for the first time, D0 K(S)(0)K+ K- decays. The low-momentum pion (s)(+) in the decay D*+ D0 (s)(+) identifies the flavor of the neutral D meson at its production. Using 468.5 fb(-1) of e+ e- colliding-beam data recorded near square root(s)=10.6 GeV by the BABAR detector at the PEP-II asymmetric-energy collider at SLAC, we measure the mixing parameters x = [1.6 2.3(stat) 1.2(syst) 0.8(model)] 10(-3), and y = [5.7 2.0(stat) 1.3(syst) 0.7(model)] 10(-3). These results provide the best measurement to date of x and y. The knowledge of the value of x, in particular, is crucial for understanding the origin of mixing.

Measurement of D-0-(D)over-bar(0) Mixing Parameters Using D-0 -> K-S(0)pi(+) pi(-) and D-0 -> (KSK+K-)-K-0 Decays

ANDREOTTI, Mirco;CALABRESE, Roberto;CECCHI, Annalisa;CIBINETTO, Gianluigi;FIORAVANTI, Elisa;FRANCHINI, Paolo;LUPPI, Eleonora;MUNERATO, Mauro;NEGRINI, Matteo;PETRELLA, Antonio;
2010

Abstract

We report a direct measurement of D0-D0 mixing parameters through a time-dependent amplitude analysis of the Dalitz plots of D(0) K(S)(0) + - and, for the first time, D0 K(S)(0)K+ K- decays. The low-momentum pion (s)(+) in the decay D*+ D0 (s)(+) identifies the flavor of the neutral D meson at its production. Using 468.5 fb(-1) of e+ e- colliding-beam data recorded near square root(s)=10.6 GeV by the BABAR detector at the PEP-II asymmetric-energy collider at SLAC, we measure the mixing parameters x = [1.6 2.3(stat) 1.2(syst) 0.8(model)] 10(-3), and y = [5.7 2.0(stat) 1.3(syst) 0.7(model)] 10(-3). These results provide the best measurement to date of x and y. The knowledge of the value of x, in particular, is crucial for understanding the origin of mixing.
2010
P. d., Amo Sanchez; J. P., Lees; V., Poireau; E., Prencipe; V., Tisserand; J. G., Tico; E., Grauges; M., Martinelli; A., Palano; M., Pappagallo; G., E...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/1436348
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