Large-p/sub T/ processes in a nonscaling parton model

Journal Article · Fri Sep 01 00:00:00 EDT 1978 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.18.1475· OSTI ID:7047830

Hwa, R C; Spiessbach, A J; Teper, M J

A nonscaling parton model is proposed to describe the large-transverse-momentum processes in hadron collisions. The scale-noninvariance behavior of the parton momentum distribution is deduced from the recent ep and ..mu..p deep-inelastic scattering data where gross violation of scaling has been observed. Power-law breaking effects are parametrized and utilized in the large-p/sub T/ calculations. The basic subprocess in which the large-angle scattering occurs is taken to be between the partons only. With the normalization as the only adjustable parameter in the theory, we have achieved excellent fits of the pion and proton inclusive cross sections at large p/sub T/ for various energies. We have also produced a no-parameter fit of the p/sub T/ dependence of the opposite-side correlation at 90/sup 0/. We predict a dip at y = 0 in the rapidity distribution at high p/sub T/ in the opposite hemisphere, but no data with p/sub T/ > 2 GeV/c is available to check the prediction. The phenomenological success of the nonscaling model therefore on the one hand restores the quark-quark hard-collision subprocess for large-p/sub T/ reactions, while on the other suggests severe deviation from scaling in lepton-induced interactions at very high Q/sup 2/.

• Research Organization: Institute of Theoretical Science, University of Oregon, Eugene, Oregon 97403
• OSTI ID: 7047830
• Journal Information: Phys. Rev., D; (United States), Vol. 18:5
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ELECTRON-PROTON INTERACTIONS
DEEP INELASTIC SCATTERING
MUON-PROTON INTERACTIONS
PARTON MODEL
SCALING LAWS
CROSS SECTIONS
INCLUSIVE INTERACTIONS
PARTICLE RAPIDITY
QUARK MODEL
TRANSVERSE MOMENTUM
COMPOSITE MODELS
ELECTRON-NUCLEON INTERACTIONS
INELASTIC SCATTERING
INTERACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
LINEAR MOMENTUM
MATHEMATICAL MODELS
MUON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
SCATTERING
645203* - High Energy Physics- Particle Interactions & Properties-Theoretical- Weak Interactions & Properties
645202 - High Energy Physics- Particle Interactions & Properties-Theoretical- Electromagnetic Interactions & Properties