We describe the detectors and trigger system used in the CERN WA92 experiment. The experiment was designed to study the production and decay of beauty particles from 350 GeV/c pi(-) interactions in copper and tungsten targets. Charged particle tracking is performed using the omega spectrometer. Silicon microstrip detectors are used to provide precise tracking information in the region of the production and the decay of heavy-flavoured particles and to trigger on the resulting high impact parameter tracks. The precision of vertex reconstruction corresponds to +/-3.7% of the mean B-decay proper lifetime. Lepton and high transverse momentum hadron signals are also used in the trigger, which accepts 23% of B-decays and rejects 98.4% of non-beauty interactions.

WA92: A fixed target experiment to trigger on and identify beauty particle decays / M., Adamovich; M., Adinolfi; Y., Alexandrov; C., Angelini; F., Antinori; C., Bacci; G., Barber; D., Barberis; D., Barney; J., Batten; W., Beusch; C., Bruschini; R., Cardarelli; A., Cardini; V., Casanova; F., Ceradini; Ciapetti, Guido; N., Dameri; G., Darbo; A., Diciaccio; A., Duane; J. P., Dufey; P., Farthouat; V., Flaminio; A., Forino; B. R., French; A., Frenkel; C., Gemme; R., Gessaroli; K., Harrison; N., Hummadi; R., Hurst; A., Kirk; Lacava, Francesco; J. C., Lassalle; C., Lazzeroni; L., Malferrari; S., Maljukov; G., Martellotti; P., Martinengo; P., Mazzanti; J. G., Mcewen; I., Minashvili; P., Musico; P., Nechaeva; A., Nisati; D., Orestano; B., Osculati; M., Passaseo; Penso, Gianni; E., Petrolo; L., Pontecorvo; A., Quareni; H., Rotscheidt; V., Ryzhov; C., Roda; L., Rossi; N., Russakovich; C., Salvo; R., Santonico; G., Schuler; A., Semenov; A., Solovjev; M., Torelli; S., Veneziano; F., Vernocchi; M., Verzocchi; D., Websdale; M., Weymann; L., Zanello; M., Zavertyaev. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - 379:2(1996), pp. 252-270. [10.1016/0168-9002(96)00480-9]

WA92: A fixed target experiment to trigger on and identify beauty particle decays

CIAPETTI, Guido;LACAVA, Francesco;PENSO, Gianni;
1996

Abstract

We describe the detectors and trigger system used in the CERN WA92 experiment. The experiment was designed to study the production and decay of beauty particles from 350 GeV/c pi(-) interactions in copper and tungsten targets. Charged particle tracking is performed using the omega spectrometer. Silicon microstrip detectors are used to provide precise tracking information in the region of the production and the decay of heavy-flavoured particles and to trigger on the resulting high impact parameter tracks. The precision of vertex reconstruction corresponds to +/-3.7% of the mean B-decay proper lifetime. Lepton and high transverse momentum hadron signals are also used in the trigger, which accepts 23% of B-decays and rejects 98.4% of non-beauty interactions.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11573/407692
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