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Associate J/{psi} + {gamma} production: A clean probe of gluon densities

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Abstract

We discuss the associate production of a J/{Psi} meson and a photon at panti p (or pp) and ep colliders. By requiring the J/{Psi} to decay into an e{sup +}e{sup -} or {mu}{sup +}{mu}{sup -} pair, we end up with an exceptionally clean final state. Furthermore, in leading order it can only be produced via gluon fusion. This process can therefore serve as a very clean probe of the gluon densities inside the proton as well as the photon. Numerical results are presented for the Tevatron panti p and HERA ep colliders. (orig.).
Authors:
Drees, M; [1]  Kim, C S [2] 
  1. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany). Gruppe Theorie
  2. Durham Univ. (United Kingdom). Dept. of Physics
Publication Date:
Aug 01, 1991
Product Type:
Technical Report
Report Number:
DESY-91-085
Reference Number:
SCA: 662340; 662330; PA: DEN-92:000318; SN: 92000645197
Resource Relation:
Other Information: PBD: Aug 1991
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ELECTRON-PROTON INTERACTIONS; INCLUSIVE INTERACTIONS; HADRON-HADRON INTERACTIONS; MUON PAIRS; LEPTONIC DECAY; PAIR PRODUCTION; J PSI-3097 MESONS; POSITRONS; ELECTRONS; MUONS MINUS; MUONS PLUS; PHOTONS; PARTICLE STRUCTURE; GLUON MODEL; GLUON-GLUON INTERACTIONS; PROTONS; THEORETICAL DATA; FEYNMAN DIAGRAM; ENERGY SPECTRA; GAMMA SPECTRA; TRANSVERSE MOMENTUM; DIFFERENTIAL CROSS SECTIONS; PARTICLE RAPIDITY; ELECTROPRODUCTION; GEV RANGE 100-1000; PROTON-ANTIPROTON INTERACTIONS; PROTON-PROTON INTERACTIONS; TEV RANGE 01-10; 662340; 662330; HADRON INTERACTIONS; PHOTON AND CHARGED-LEPTON INTERACTIONS WITH HADRONS
OSTI ID:
10114052
Research Organizations:
Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
Other: ON: DE92758899; TRN: DE9200318
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
DEN
Size:
21 p.
Announcement Date:
Jun 30, 2005

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Citation Formats

Drees, M, and Kim, C S. Associate J/{psi} + {gamma} production: A clean probe of gluon densities. Germany: N. p., 1991. Web.
Drees, M, & Kim, C S. Associate J/{psi} + {gamma} production: A clean probe of gluon densities. Germany.
Drees, M, and Kim, C S. 1991. "Associate J/{psi} + {gamma} production: A clean probe of gluon densities." Germany.
@misc{etde_10114052,
title = {Associate J/{psi} + {gamma} production: A clean probe of gluon densities}
 author = {Drees, M, and Kim, C S}
 abstractNote = {We discuss the associate production of a J/{Psi} meson and a photon at panti p (or pp) and ep colliders. By requiring the J/{Psi} to decay into an e{sup +}e{sup -} or {mu}{sup +}{mu}{sup -} pair, we end up with an exceptionally clean final state. Furthermore, in leading order it can only be produced via gluon fusion. This process can therefore serve as a very clean probe of the gluon densities inside the proton as well as the photon. Numerical results are presented for the Tevatron panti p and HERA ep colliders. (orig.).}
 place = {Germany}
 year = {1991}
 month = {Aug}
 }