Measurement of CP-violation asymmetries in D[superscript 0]→K[subscript S][superscript 0]π[superscript +]π[superscript -]
Name
Aaltonen-2012-Measurement of CP-violation asymmetries in.pdf
Size
3.92 MB
Format
Adobe PDF
Checksum (MD5)
7256302ef168a5a9a2134a925f5844f7
Author(s)
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Paus, Christoph M. E.
Date Issued
August 2012
Journal
Physical Review D
Publisher
American Physical Society
Citation
Aaltonen, T. et al. “Measurement of CP-violation asymmetries in D[superscript 0]→K[subscript S][superscript 0]π[superscript +]π[superscript -].” Physical Review D 86.3 (2012). © 2012 American Physical Society
Version
Final published version
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevD.86.032007
