We report a measurement of time-integrated CP-violation asymmetries in the resonant substructure of the three-body decay D0→KS0π +π - using CDF II data corresponding to 6.0fb -1 of integrated luminosity from Tevatron pp̄ collisions at √s=1.96TeV. The charm mesons used in this analysis come from D *+(2010) →D0π + and D *-(2010)→D ̄0π -, 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 D0 and D ̄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 American Physical Society.

Measurement of CP-violation asymmetries in D0→KS0π +π -

Sforza F.;
2012-01-01

Abstract

We report a measurement of time-integrated CP-violation asymmetries in the resonant substructure of the three-body decay D0→KS0π +π - using CDF II data corresponding to 6.0fb -1 of integrated luminosity from Tevatron pp̄ collisions at √s=1.96TeV. The charm mesons used in this analysis come from D *+(2010) →D0π + and D *-(2010)→D ̄0π -, 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 D0 and D ̄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 American Physical Society.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/970588
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