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

AuthorsAaltonen, T.; Álvarez González, B.; Casal, Bruno ; Cuevas, Javier ; Gómez, G. ; Palencia, Enrique ; Rodrigo, Teresa ; Ruiz Jimeno, Alberto ; Scodellaro, Luca ; Vila, Iván ; Vilar, Rocío ; Vizán, J. ; CDF Collaboration
Issue Date2012
PublisherAmerican Physical Society
CitationPhysical Review D 86: 032007 (2012)
AbstractWe 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.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevD.86.032007
Identifiersdoi: 10.1103/PhysRevD.86.032007
issn: 1550-7998
e-issn: 1550-2368
Appears in Collections:(IFCA) Artículos
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