Published October 1982
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Investigation on the jet structure of hadronic events with a high energy photon
Description
Hadronic events including geometrically isolated high energy photons have been investigated by the CELLO detector at PETRA at √s=22 and √s=34 GeV. At √s=34 GeV the predominant source of these events was found to be initial state bremsstrahlung (75%). At √s=22 GeV are only 57% of the isolated photons coming from bremsstrahlung. The jet structure of these events has been tested using the jet measures thrust, sphericity, psub(T) and nsub(ch) as function of the energy of the photon. The agreement with QED and QCD predictions is good. (orig.)
Availability note (English)
MF available from INIS under the Report Number.Abstract (German)
Am CELLO-Detektor bei PETRA wurden hadronische Ereignisse mit hochenergetischen, raeumlich isolierten Photonen bei √s=22 und √s=34 GeV untersucht. Bei √s=34 GeV sind die Photonen zum groessten Teil auf Bremsstrahlung der einlaufenden Teilchen zurueckzufuehren. Bei √s=22 GeV sind nur 57% der Photonen Bremsstrahlung. Die Jetstruktur dieser Ereignisse wurde mit Hilfe der Jetmasse Thrust, Sphaerizitaet, psub(T) und nsub(ch) in Abhaengigkeit von der Photonenenergie gemessen. Die Uebereinstimmung dieser Abhaengigkeiten mit den Vorhersagen der QED und QCD ist gut. (orig.)
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Additional details
Additional titles
- Original title (German)
- Untersuchung der Jetstruktur hadronischer Ereignisse mit einem harten Photon
Publishing Information
- Imprint Pagination
- 85 p.
- Report number
- KFK--3405-B
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 14740167
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- ANNIHILATION; BREMSSTRAHLUNG; CHARGED PARTICLES; ELECTRON-POSITRON INTERACTIONS; ENERGY DEPENDENCE; EXPERIMENTAL DATA; GEV RANGE 10-100; HADRONS; MULTIPLE PRODUCTION; MULTIPLICITY; PHOTOPRODUCTION; TRANSVERSE MOMENTUM
- Descriptors DEC
- BASIC INTERACTIONS; DATA; ELECTROMAGNETIC INTERACTIONS; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; ENERGY RANGE; GEV RANGE; INFORMATION; INTERACTIONS; LEPTON-LEPTON INTERACTIONS; LINEAR MOMENTUM; NUMERICAL DATA; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; RADIATIONS