Published October 1990
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Separation of minimum and higher twist in the photoproduction of mesons with large transverse momenta
Description
Higher-twist effects in point-like photon interactions on hydrogen have been studied in xF-distributions of charged particles for -0.2 < xF < 0.84 and pT > 2.0 GeV/c. Data were taken with a tagged photon beam with energies between 70 and 170 GeV and a pion/kaon beam at fixed energies of 80 and 140 GeV using the same setup of detectors at the CERN-Ω-spectrometer (WA69 experiment). The pion and kaon interactions were used to obtain an estimate of the hadron-like photon component. A first estimation of Higher-Twist cross sections in photoproduction of mesons at high pT has been obtained that is consistent with QCD-expectations. (orig.)
Availability note (English)
MF available from INIS under the Report Number.Abstract (German)
In der vorliegenden Arbeit wurde die Photoproduktion geladener Teilchen bei grossen Transversalimpulsen (pT > 2.0 GeV/c) studiert, um Vorhersagen aus QCD-Rechnungen fuer die punktfoermige Komponente des Photons zu testen. Ziel der Untersuchungen war es, eine erste experimentelle Schaetzung des Higher-Twist Effekts in der Photoproduktion zu erhalten. Die ausgewerteten Daten wurden von der Ω-Photon-Kollaboration (WA 69) am Ω-Spektrometer des CERN aufgenommen. Es standen 13x106 Ereignisse aus der Photoproduktion und 17x106 mit einem gemischten Pion/Kaonstrahl gewonnene Ereignisse zur Verfuegung. (orig.)
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Additional details
Additional titles
- Original title (German)
- Separation von Minimum- und Higher-Twist in der Photoproduktion von Mesonen mit grossen Transversalimpulsen
Publishing Information
- Imprint Pagination
- 72 p.
- Report number
- BONN-IR--90-47
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 22036394
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Numerical Data, Thesis
- Descriptors DEI
- CHARGED PARTICLES; DIFFERENTIAL CROSS SECTIONS; EXPERIMENTAL DATA; GEV RANGE 10-100; GEV RANGE 100-1000; INCLUSIVE INTERACTIONS; KAONS; PHOTON-PROTON INTERACTIONS; PHOTOPRODUCTION; PIONS; TRANSVERSE MOMENTUM
- Descriptors DEC
- BASIC INTERACTIONS; BOSONS; CROSS SECTIONS; DATA; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; ENERGY RANGE; GEV RANGE; HADRONS; INFORMATION; INTERACTIONS; LINEAR MOMENTUM; MESONS; NUMERICAL DATA; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; PHOTON-BARYON INTERACTIONS; PHOTON-HADRON INTERACTIONS; PHOTON-NUCLEON INTERACTIONS; PSEUDOSCALAR MESONS; STRANGE MESONS; STRANGE PARTICLES