We report a measurement of time-integrated CP-violation asymmetries in the resonant substructure of the three-body decay D-0 -> K-S(0)pi(+)pi(-) using CDF II data corresponding to 6.0 fb(-1) of integrated luminosity from Tevatron p (p) over bar collisions at root s = 1.96 TeV. The charm mesons used in this analysis come from D*+(2010) -> D-0 pi(+) and D*-(2010) -> (D) over bar (0)pi(-), where the production flavor of the charm meson is determined by the charge of the accompanying pion. We apply a Dalitz-amplitude analysis for the description of the dynamic decay structure and use two complementary approaches, namely, a full Dalitz-plot fit employing the isobar model for the contributing resonances and a model-independent bin-by-bin comparison of the D-0 and (D) over bar (0) Dalitz plots. We find no CP-violation effects and measure an asymmetry of A(CP) = (-0.05 +/- 0.57(stat) +/- 0.54(syst))% for the overall integrated CP-violation asymmetry, consistent with the standard model prediction.

Measurement of CP-violation asymmetries in D-0 -> K-S(0)pi(+)pi(-)

INTROZZI, GIANLUCA;
2012-01-01

Abstract

We report a measurement of time-integrated CP-violation asymmetries in the resonant substructure of the three-body decay D-0 -> K-S(0)pi(+)pi(-) using CDF II data corresponding to 6.0 fb(-1) of integrated luminosity from Tevatron p (p) over bar collisions at root s = 1.96 TeV. The charm mesons used in this analysis come from D*+(2010) -> D-0 pi(+) and D*-(2010) -> (D) over bar (0)pi(-), where the production flavor of the charm meson is determined by the charge of the accompanying pion. We apply a Dalitz-amplitude analysis for the description of the dynamic decay structure and use two complementary approaches, namely, a full Dalitz-plot fit employing the isobar model for the contributing resonances and a model-independent bin-by-bin comparison of the D-0 and (D) over bar (0) Dalitz plots. We find no CP-violation effects and measure an asymmetry of A(CP) = (-0.05 +/- 0.57(stat) +/- 0.54(syst))% for the overall integrated CP-violation asymmetry, consistent with the standard model prediction.
2012
Sì, ma tipo non specificato
Internazionale
86
032007
474
info:eu-repo/semantics/article
262
T., Aaltonen; B. A., Gonzalez; S., Amerio; D., Amidei; A., Anastassov; A., Annovi; J., Antos; G., Apollinari; J. A., Appel; T., Arisawa; A., Artikov; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11571/570460
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