Identification of events with a secondary vertex in the experiment EXCHARM

A simple algorithm for identifying events with secondary vertices (signal events) is suggested. The differences Rx, Ry between the largest and the smallest impact parameters Di of the tracks belonging to each of the events analyzed are used in establishing the identification criteria for signal and background events. An effective method for identifying the tracks associated with a particular secondary vertex in an event is developed. The method is based on the differences between the asymmetries exhibited by the sets Di for individual signal events and background events. The algorithm has been tested using simulated data. 12 refs., 7 figs