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RICH hit multiplicity

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angelaromano edited this page Aug 6, 2015 · 3 revisions

This algorithm aims at rejecting multi-track events and it corresponds to a cut on the number of RICH hits fired in time with respect to the L0 trigger.

The cut is: 3 < nHits < 22 and has been studied in details with MC Kpnn in here. In brief, the distribution of the number of hits for the signal decay mode Kpnn drops above Nhits ~ 25, while K3pi events have generally Nhits > 25.

The algorithm has been deployed on NA62 PC-farm during 2015 run.

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