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

B Aubert1, M Bona, D Boutigny

  • 1Laboratoire de Physique des Particules, IN2P3/CNRS et Université de Savoie, F-74941 Annecy-Le-Vieux, France.

Physical Review Letters
|March 16, 2007
PubMed

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Summary
This summary is machine-generated.

This study analyzes B0 meson decays using BABAR data, measuring polarization fractions for vector-tensor and vector-vector modes. Key parameters, including CP violation sensitivity, were determined for these important particle physics processes.

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.

Related Experiment Videos

  • 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.