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Study of B-->D(*)sJ +-D(*) decays.

B Aubert1, R Barate, D Boutigny

  • 1Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, France.

Physical Review Letters
|November 5, 2004
PubMed

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Summary
This summary is machine-generated.

This study investigates the production of D(sJ)(2317)+ and D(sJ)(2460)+ mesons in B decays using BABAR data. New branching fractions for B decays involving these mesons were measured, including previously unobserved modes.

Area of Science:

  • Particle Physics
  • High-Energy Physics
  • Hadron Spectroscopy

Background:

  • The study focuses on the production mechanisms of specific charm mesons within B meson decays.
  • Understanding these decays provides insights into the Standard Model of particle physics and quantum chromodynamics.

Purpose of the Study:

  • To measure branching fractions for D(sJ)(2317)+ and D(sJ)(2460)+ meson production in B decays.
  • To observe and characterize new decay modes, including B --> D(sJ)D(*).
  • To perform an angular analysis of D(sJ)(2460)+ --> D(s)+gamma decays to investigate its spin properties.

Main Methods:

  • Utilized a data sample of 122.1 x 10^6 BB pairs collected by the BABAR detector at the PEP-II B factory.
  • Analyzed B decays, identifying D(sJ)(2317)+ and D(sJ)(2460)+ mesons and their subsequent decay products.

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  • Performed angular analyses to probe the spin of the D(sJ)(2460)+ meson.

    • Main Results:

    • Observed and measured branching fractions for several B decay modes involving D(sJ)(2317)+ and D(sJ)(2460)+ mesons.
    • Reported branching fractions for previously unobserved decays, such as B --> D(sJ)D(*).
    • Conducted an angular analysis of D(sJ)(2460)+ --> D(s)+gamma decays.

    Conclusions:

    • The study provides crucial measurements of D(sJ) meson production in B decays.
    • The results contribute to a better understanding of heavy quarkonium spectroscopy and decay dynamics.
    • The angular analysis offers constraints on the spin assignment of the D(sJ)(2460)+ meson.