Vector-Tensor and Vector-Vector Decay Amplitude Analysis of B0->phi K*0

TL;DR

This paper presents an amplitude analysis of B0 meson decays into phi and K* resonances, measuring polarization fractions, branching ratios, and CP-violation parameters using a large data sample from the BABAR detector.

Contribution

It provides detailed measurements of polarization and CP-violation parameters in B0 decays involving vector and tensor mesons, advancing understanding of decay dynamics.

Findings

Longitudinal polarization fraction for vector-tensor decay: 0.853

Longitudinal polarization fraction for vector-vector decay: 0.506

Measured parameters include branching fractions and CP-violation indicators

Abstract

We perform an amplitude analysis of the decays B0->phi K^*_2(1430)0, phi K^*(892)0, and phi(K pi)^0_S-wave with a sample of about 384 million BBbar pairs recorded with the BABAR detector. The fractions of longitudinal polarization f_L of the vector-tensor and vector-vector decay modes are measured to be 0.853 +0.061-0.069 +-0.036 and 0.506 +-0.040 +-0.015, respectively. Overall, twelve parameters are measured for the vector-vector decay and seven parameters for the vector-tensor decay, including the branching fractions and parameters sensitive to CP-violation.