Bs Physics at LEP, SLD, and CDF: Delta m_s and Delta Gamma_s

TL;DR

This paper reviews experimental results on Bs meson properties from LEP, SLD, and CDF, focusing on width differences and oscillation frequencies, highlighting recent progress and potential hints of oscillation signals.

Contribution

It provides a comprehensive summary of experimental measurements of Bs meson oscillations and width differences, including new combined results and a potential oscillation hint near 17 ps^{-1}.

Findings

Width difference ΔΓ_s agrees with theoretical estimates.

Oscillation frequency Δm_s has a tentative hint around 17 ps^{-1}.

Combined experimental limits constrain Bs oscillation parameters.

Abstract

The current status of the experimental knowledge of $\Bs$ meson physics is reviewed. Results from LEP and CDF on the width difference $\dgs$ are presented, the corresponding average is found to be in good agreement with the present theoretical estimation. The $\Bs$ oscillations have not yet been resolved, despite the progress recently achieved by SLD and ALEPH. The world combination, including results from the LEP experiments, SLD and CDF, is presented, together with the expected and observed lower limit on the $\Bs$ oscillation frequency. A tantalizing hint of an oscillation is observed around $\dms\sim17 \psin$, near future results could increase the significance of this hint.