Measurement of Time-Dependent CP-Violating Asymmetries in B0 Meson Decays to eta'K0L

Details Measurement of Time-Dependent CP-Violating Asymmetries in B0 Meson Decays to eta'K0L Measurement of Time-Dependent CP-Violating Asymmetries in B0 Meson Decays to eta'K0L

2005-07-20

arxiv.org/abs/hep-ex/0507087v1

Physics

High Energy Physics

High Energy Physics - Experiment

15 pages, 4 postscript figures, submitted to the International Europhysics Conference On High-Energy Physics (HEP 2005), 7/21-

Scientific paper

We present a preliminary measurement of CP-violating parameters S and C from fits of the time-dependence of B0 meson decays to eta'K0L. The data were recorded with the BABAR detector at PEP-II and correspond to 232 10^6 BBbar pairs produced in e+e- annihilation through the Y(4S) resonance. By fitting the time-dependent CP asymmetry of the reconstructed B0 --> eta'K0L events, we find S = 0.60 +- 0.31 +- 0.04 and C = 0.10 +- 0.21 +- 0.03, where the first error quoted is statistical and the second is systematic. We also perform a combined fit using both eta'K0S and eta'K0L data, and find S = 0.36 +- 0.13 +- 0.03 and C = -0.16 +- 0.09 +- 0.02.

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