CERN Accelerating science

LHCb Note
Report number	LHCb-2006-061 ; CERN-LHCb-2006-061
Title	Rich Reconstruction and particle identification using ring fit methods : Standalone PID in the Rich2 detector
Author(s)	Benayoun, M (Paris U., VI-VII ) ; David, P (Paris U., VI-VII ) ; DelBuono, L (Paris U., VI-VII ) ; Gilles, G (Paris U., VI-VII ) ; Jones, C H (Cambridge U. )
Submitted by	[email protected] on 16 Nov 2006
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; LHCb
Abstract	We have extended the ring fit algorithm presented in earlier works, in order to transform it into a fully standalone PID algorithm running over the full RICH2 momentum range. For this purpose, the full information provided by the tracking (track direction and momentum as well as their errors) is accounted for in the minimized chi squared function along with the photon information. Additionally, all available information concerning the Cerenkov light emission effect is accounted for in the PID algorithm. PID efficiencies and misidentification rates are found similar to the global ID results, while the statistical information is still much more reliable.
Copyright/License	Preprint: (License: CC-BY-4.0)

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