Si$\Lambda$ViO: A Trigger for $\Lambda$-Hyperons

Laura Fabbietti (for the FOPI Collaboration); Martin Berger; Robert Muenzer

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SiΛViO: A Trigger for Λ-Hyperons

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arxiv 1307.7470 v1 pith:FO5EEJNI submitted 2013-07-29 physics.ins-det

Si$\Lambda$ViO: A Trigger for $\Lambda$-Hyperons

Robert Muenzer , Martin Berger , Laura Fabbietti (for the FOPI Collaboration) This is my paper

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keywords lambdatriggerbeencontainingdeviceeventshyperonstracking

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abstract

As online trigger for events containing $\Lambda$ hyperons in p+p collisions at $\mathrm{3.1\,GeV}$ 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 $\Lambda$-hyperon candidate.

Si$\Lambda$ViO: A Trigger for $\Lambda$-Hyperons

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