Measurement of Polarization and Triple-Product Correlations in B -> phi K^* Decays

Details Measurement of Polarization and Triple-Product Correlations in B -> phi K^* Decays Measurement of Polarization and Triple-Product Correlations in B -> phi K^* Decays

2005-03-06

arxiv.org/abs/hep-ex/0503013v2

Phys.Rev.Lett.94:221804,2005

Physics

High Energy Physics

High Energy Physics - Experiment

9 pages, 2 figures, submit to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.94.221804

We present measurements of decay amplitudes and triple-product correlations in B -> phi K^* decays based on 253 fb^-1 of data recorded at the Upsilon(4S) resonance with the Belle detector at the KEKB e^+ e^- storage ring. The decay amplitudes for the three different helicity states are determined from the angular distributions of final state particles. The longitudinal polarization amplitudes are found to be 0.45 +- 0.05 +- 0.02 for B^0 -> phi K^{*0} and 0.52 +- 0.08 +- 0.03 for B^+ -> phi K^{*+} decays. CP- and T-odd CP-violating triple-product asymmetries are measured to be consistent with zero.

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