Prospects for the measurement of B_s oscillations with the ATLAS detector at LHC

Abstract

The prospects for the measurement of $B_s^0$ oscillations with the ATLAS detector at the Large Hadron Collider are presented. $B_s^0$ candidates in the $D_s^{-}\ddot{I}{€}^{+}$ and $D_s^{-}{a}_1^{+}$ decay modes from semileptonic events were fully simulated and reconstructed, using a detailed detector description. The sensitivity and the expected accuracy for the measurement of the oscillation frequency were derived from unbinned maximum likelihood amplitude fits as functions of the integrated luminosity. A detailed treatment of the systematic uncertainties was performed. The dependence of the measurement sensitivity on various parameters was also evaluated.

Invited talk at the Workshop on the CKM Unitarity Triangle, IPPP Durham, April 2003 (eConf C0304052). 4 pages LaTeX, 2 eps figures