ATLAS sensitivity range for the xs measurement
S. Gadomski, P. Eerola, A. V. Bannikov
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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