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Related Experiment Video

Updated: Jul 5, 2026

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

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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

Summary

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.

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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.
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.