Production of bound quark-antiquark systems

Journal Article · Mon May 01 04:00:00 EDT 1978 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.17.2332· OSTI ID:7085930

Jones, L M; Wyld, Jr, H W

We use the technique of averaging low-order quantum-chromodynamics diagrams over the range from quark threshold to meson threshold to compute the photoproduction of psi and UPSILON vector mesons and the hadroproduction of UPSILON. We find that the energy dependence of psi photoproduction is reproduced quite well. The model then implies a very rapid energy variation for UPSILON photoproduction at Fermilab energies. Calculations for hadroproduction of UPSILON show that at Fermilab energies the Drell-Yan mechanism is much more important for the production of b quarks than it is for the production of charmed quarks. We compute rates for the production of UPSILON at Fermilab and CERN ISR energies and compare with experiment. Because the model has well defined dependence on the mass of the quark involved, we can compute the expected rates for hadroproduction of higher-mass bound systems. The variation of these rates with mass is comparable to that observed for experimental ..mu../sup +/..mu../sup -/ pair production in this mass region, leading us to conclude that the signal/noise ratio for production of higher vector mesons should be roughly comparable to that for the UPSILON.

• Research Organization: Physics Department, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
• OSTI ID: 7085930
• Journal Information: Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 17:9; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645202* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
645400 -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BASIC INTERACTIONS
BOSONS
BOUND STATE
BRANCHING RATIO
CHARM PARTICLES
COLOR MODEL
COMPOSITE MODELS
DRELL MODEL
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY DEPENDENCE
FIELD THEORIES
HADRONS
INTERACTIONS
MASS FORMULAE
MATHEMATICAL MODELS
MESON RESONANCES
MESONS
PAIR PRODUCTION
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PERTURBATION THEORY
PHOTOPRODUCTION
POSTULATED PARTICLES
PROPAGATOR
PSI RESONANCES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUANTUM NUMBERS
QUARK MODEL
QUARKS
RESONANCE PARTICLES
UPSILON RESONANCES
VECTOR MESONS