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Related Experiment Videos

Study of the decay Bs(0)-->Ds(*)Ds(*).

V M Abazov1, B Abbott, M Abolins

  • 1Joint Institute for Nuclear Research, Dubna, Russia.

Physical Review Letters
|February 1, 2008
PubMed

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Summary
This summary is machine-generated.

Researchers studied the Bs0 decay into Ds(*)Ds(*) using D0 experiment data. They precisely measured the width difference DeltaGamma(s)CP in the Bs0-Bs0 system, providing new insights into particle physics.

Area of Science:

  • High Energy Physics
  • Particle Physics
  • Collider Physics

Background:

  • The Bs0-Bs0 system is crucial for testing the Standard Model of particle physics.
  • Understanding the properties of Bs0 meson decays provides insights into CP violation and fundamental symmetries.
  • Previous measurements of the width difference DeltaGamma(s)CP have had limited precision.

Purpose of the Study:

  • To measure the branching fraction of the decay Bs(0)-->Ds(*)Ds(*).
  • To determine the most precise value for the width difference DeltaGamma(s)CP in the Bs(0)-Bs(0) system.
  • To contribute to a deeper understanding of CP-violating phenomena in B meson systems.

Main Methods:

  • Analysis of a data sample of 1.3 fb(-1) collected by the D0 experiment at the Fermilab Tevatron collider.

Related Experiment Videos

  • Partial reconstruction of one Ds(*) meson via the decay Ds-->phi mu nu.
  • Identification of the second Ds(*) meson using the decay Ds-->phi pi, without distinguishing between Ds and Ds(*) states.

    • Main Results:

    • A 90% confidence level range for the branching fraction Br(Bs(0)-->Ds(*)Ds(*)) was determined to be [0.002, 0.080], with a central value of 0.039.
    • The most precise estimate of the width difference DeltaGamma(s)CP in the Bs(0)-Bs(0) system was obtained: DeltaGamma(s)CP/Gamma(s) = 0.079.
    • Statistical and systematic uncertainties for both measurements were carefully evaluated.

    Conclusions:

    • The study provides a significant improvement in the precision of the Bs(0) decay properties.
    • The precise measurement of DeltaGamma(s)CP contributes to stringent tests of the Standard Model.
    • This research enhances our knowledge of CP symmetry and its violation in the subatomic world.