Search for CP Violation in the Decay tau- -> pi- K^0_S (>= 0 pi0) nu_tau

Details Search for CP Violation in the Decay tau- -> pi- K^0_S (>= 0 pi0) nu_tau Search for CP Violation in the Decay tau- -> pi- K^0_S (>= 0 pi0) nu_tau

2011-09-07

arxiv.org/abs/1109.1527v2

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 2 encapsulated postscript figures, submitted to Phys. Rev. D (Rapid Communications)

Scientific paper

We report a search for CP violation in the decay \tau- -> \pi - \K^0_S (>= 0 \pi 0) \nu_\tau\ using a dataset of 437 million \tau\ lepton pairs, corresponding to an integrated luminosity of 476 fb^{-1}, collected with the BABAR detector at the PEP-II asymmetric energy e+e- storage rings. The CP-violating decay-rate asymmetry is determined to be (-0.45 +/- 0.24 +/- 0.11)%, approximately three standard deviations from the Standard Model prediction of (0.33 +/- 0.01)%.

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