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ATLAS sensitivity range for the xs measurement

S. Gadomski, P. Eerola, A. V. Bannikov

hep-exarXiv:hep-ex/9611001

Abstract

Previous results for the prospects of Bs mixing measurement in the ATLAS experiment at LHC are updated. The improved analysis method of the studied decay channels Bs -> Ds pi and Bs -> Ds a1, combined with most recent values for the branching ratios and the Bs lifetime, leads to the new ATLAS sensitivity range for the xs measurement: xsmax = 42. An extensive study is done in order to estimate how xsmax is influenced by the B-decay proper-time resolution of the vertex detector, as well as by the number of events and by the signal-to-background ratio.

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