Si$Lambda$vio: A trigger for $Lambda$-hyperons
M_s02nzer, Robert and Berger, Martin and Fabbietti, Laura and Averbeck, R. and Andronic, A. and others
Keywords
trigger | Lambda: particle identification
Abstract
As online trigger for events containing _s13_s17923_s19 hyperons in p þ p collisions at 3.1 GeV a silicon-based device has been designed and built. This system has been integrated close to the target region within the FOPI spectrometer at GSI and was also employed as a tracking device to improve the vertex reconstruction of secondary decays. The design of the detector components, read-out, the trigger capability as well as the tracking performance are presented. An enrichment factor of about 14 was achieved for events containing a _s13_s17923_s19 -hyperon candidate.
