Measurement of CP-violation asymmetries in D[superscript 0]→K[subscript S][superscript 0]π[superscript +]π[superscript -]
We report a measurement of time-integrated CP-violation asymmetries in the resonant substructure of the three-body decay D[superscript 0]→K[subscript S][superscript 0]π[superscript +]π[superscript -] using CDF II data corresponding to 6.0 fb[superscript -1] of integrated luminosity from Tevatron pp...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2012
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| Online Access: | http://hdl.handle.net/1721.1/74207 https://orcid.org/0000-0002-6047-4211 |
| Summary: | We report a measurement of time-integrated CP-violation asymmetries in the resonant substructure of the three-body decay D[superscript 0]→K[subscript S][superscript 0]π[superscript +]π[superscript -] using CDF II data corresponding to 6.0 fb[superscript -1] of integrated luminosity from Tevatron pp̅ collisions at √s=1.96 TeV. The charm mesons used in this analysis come from D[superscript *+](2010)→D[superscript 0]π[superscript +] and D[superscript *-](2010)→D̅[superscript 0]π[superscript -], 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[superscript 0] and D̅[superscript 0] Dalitz plots. We find no CP-violation effects and measure an asymmetry of ACP=(-0.05±0.57(stat)±0.54(syst))% for the overall integrated CP-violation asymmetry, consistent with the standard model prediction. |
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