Search for CP Violation in the Decays D0 --> K- K+ and D0 --> pi- pi+

Details Search for CP Violation in the Decays D0 --> K- K+ and D0 --> pi- pi+ Search for CP Violation in the Decays D0 --> K- K+ and D0 --> pi- pi+

2007-09-17

arxiv.org/abs/0709.2715v1

Phys.Rev.Lett.100:061803,2008

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 3 postscript figures, submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.100.061803

We measure CP-violating asymmetries of neutral charmed mesons in the modes D0 --> K- K+ and D0 --> pi- pi+ with the highest precision to date by using D0 --> K- pi+ decays to correct detector asymmetries. An analysis of 385.8 fb-1 of data collected with the BaBar detector yields values of aCP(KK) = (0.00 +/- 0.34 (stat.) +/- 0.13 (syst.))% and aCP(pipi) = (-0.24 +/- 0.52 (stat.) +/- 0.22 (syst.))%, which agree with Standard Model predictions.

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