Measurements of CP-violating Asymmetries in $B^{0}\to K_{s}^{0}π^{0}$ Decays

Details Measurements of CP-violating Asymmetries in $B^{0}\to K_{s}^{0}π^{0}$ Decays Measurements of CP-violating Asymmetries in $B^{0}\to K_{s}^{0}π^{0}$ Decays

2004-02-27

arxiv.org/abs/hep-ex/0403001v1

Phys.Rev.Lett.93:131805,2004

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 2 postscript figures, submitted to PRL

Scientific paper

10.1103/PhysRevLett.93.131805

We present a measurement of the time-dependent CP-violating (CPV) asymmetries in $B^{0}\to K_{s}^{0}\pi^{0}$ decays based on 124 million $\Upsilon(4S)\to B\bar{B}$ decays collected with the BaBar detector at the PEP-II asymmetric-energy $B$ Factory at SLAC. In a sample containing $122\pm 16$ signal decays, we obtain the magnitude of the direct CPV asymmetry $C_{K_{s}^{0}\pi^{0}} = 0.40^{+0.27}_{-0.28} \pm 0.09$ and the magnitude of the CPV asymmetry in the interference between mixing and decay $S_{K_{s}^{0}\pi^{0}} = 0.48^{+0.38}_{-0.47} \pm 0.06$ where the first error is statistical and the second systematic.

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