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Particle identification algorithms for the HARP forward spectrometer

AuthorsCatanesi, M. G.; Cervera Villanueva, Anselmo ; Novella, Pau ; Burguet Castell, Jordi; Gómez Cadenas, Juan José ; Sorel, Michel ; Tornero, Ana María ; Arce, Pedro
KeywordsChorus Experiment
Particle identification
Threshold Cherenkov
Time of flight
Hadron production
Issue Date3-Jan-2007
CitationNuclear Instruments & Methods in Physics Research Section A - Accelerators, Spectrometers, Detectors and Associated Equipment 572(2): 899-921 (2007)
AbstractThe particle identification (PID) methods used for the calculation of secondary pion yields with the HARP forward spectrometer are presented. Information from time of flight and Cherenkov detectors is combined using likelihood techniques. The efficiencies and purities associated with the different PID selection criteria are obtained from the data. For the proton-aluminium interactions at 12.9 GeV/c incident momentum, the PID efficiencies for positive pions are 86% in the momentum range below 2 GeV/c, 92% between 2 and 3 GeV/c and 98% in the momentum range above 3 GeV/c. The purity of the selection is better than 92% for all momenta. Special emphasis has been put on understanding the main error sources. The final PID uncertainty on the pion yield is 3.3%.
Description23 páginas, 26 figuras, 5 tablas.-- PACS nrs.: 95.55.Vj; 28.85.+c; 07.75.+h; 07.05.Kf; 14.40.Aq.-- et al.
Publisher version (URL)http://dx.doi.org/10.1016/j.nima.2006.11.071
Appears in Collections:(IFIC) Artículos
(IFCA) Artículos
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