Vector-tensor and vector-vector decay amplitude analysis of B0-->phiK*0

Area of Science:

• High-energy particle physics
• Quantum chromodynamics
• Hadron spectroscopy

Background:

• B mesons are crucial for studying CP violation.
• Understanding B meson decays provides insights into the Standard Model.
• Previous studies have explored various B meson decay modes.

Purpose of the Study:

• To perform an amplitude analysis of B0 decays into phiK*(2)(1430)0, phiK*(892)0, and phi(Kpi)0(S-wave).
• To measure the fractions of longitudinal polarization (fL) for vector-tensor and vector-vector decay modes.
• To determine branching fractions and parameters sensitive to CP violation.

Main Methods:

• Amplitude analysis of approximately 384x10^6 BBbar pairs.
• Data collected using the BABAR detector.
• Simultaneous fit of relevant parameters.

Main Results:

• Measured fL for vector-tensor decay mode: 0.853(-0.069+0.061) +/- 0.036.
• Measured fL for vector-vector decay mode: 0.506 +/- 0.040 +/- 0.015.
• Determined twelve parameters for vector-vector decay and seven for vector-tensor decay.

Conclusions:

• The study provides precise measurements of polarization fractions and other parameters in B0 decays.
• These results contribute to a deeper understanding of CP violation and the underlying physics of B meson decays.
• The findings can be used to test theoretical models in particle physics.