Results on heavy quark selection through an impact parameter trigger

The implementation of a trigger aimed at selecting those nuclear interactions which contain a charm particle is described. The trigger uses a fast emulator of the PDP-11 which calculates the impact parameter of the decaying charged tracks originating from the charm decay. An enrichment factor of 15...

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Published inIEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (USA) Vol. 37; no. 2; pp. 236 - 240
Main Authors Adamovitch, M., Alexandrov, Y., Gerasimov, S., Kharlamov, S., Malinina, L., Zavertiaev, M., Antinori, F., Dameri, M., Hurst, R., Osculati, B., Rossi, L., Tomasini, G., Bailly, J.L., Buys, A., Grard, F., Legros, P., Forino, A., Gessaroli, R., Mazzanti, P., Quareni, A., Viaggi, F., Meroni, C., Redaelli, N., Torretta, D., Barberis, D., Beusch, W., Bourgeois, F., Corre, A., Davenport, M., Dufey, J.P., French, B.R., Jacholkowski, A., Knudson, K., Lassalle, J.C., Muller, F., Pegaitaz, R.
Format Journal Article Conference Proceeding
LanguageEnglish
Published United States IEEE 01.04.1990
Subjects
440104 - Radiation Instrumentation- High Energy Physics Instrumentation
645103 - High Energy Physics- Particle Interactions & Properties-Experimental- Strong Interactions & Baryon & Meson Properties
645204 - High Energy Physics- Particle Interactions & Properties-Theoretical- Strong Interactions & Properties
CHARGED PARTICLE DETECTION
CHARM PARTICLES
Contamination
DECAY
DETECTION
Detectors
ELECTRONIC CIRCUITS
ELEMENTARY PARTICLES
FERMIONS
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
Magnetic field measurement
MEASURING INSTRUMENTS
NUCLEAR REACTION ANALYZERS
Particle beams
PARTICLE TRACKS
Physics
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Pollution measurement
POSTULATED PARTICLES
Production
PULSE CIRCUITS
QUARKS
RADIATION DETECTION
Spectroscopy
Target tracking
Telescopes
TRIGGER CIRCUITS
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Summary:The implementation of a trigger aimed at selecting those nuclear interactions which contain a charm particle is described. The trigger uses a fast emulator of the PDP-11 which calculates the impact parameter of the decaying charged tracks originating from the charm decay. An enrichment factor of 15 is thereby obtained. The results obtained show that, in its present implementation, this trigger, while giving a good enrichment factor, performs a correct rejection, since it does not eliminate many good events that would have been retained by the more sophisticated selection of the offline programs.< >
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
CONF-900143-
ISSN:0018-9499
1558-1578
DOI:10.1109/23.106625