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Title: Inclusive hadronic production cross sections measured in proton-nucleus collisions at. sqrt. s = 27. 4 GeV

Inclusive hadronic production cross sections measured in proton-nucleus collisions at. sqrt. s = 27. 4 GeV We present results on the production of hadrons in collisions of 400-GeV/c protons with beryllium, copper, and tungsten nuclei. The data cover the region from 5.6 to 8.0 GeV/c in the transverse momentum of the final-state hadron and from 73/sup 0/ to 102/sup 0/ in the proton-nucleon center-of-momentum frame production angle theta/sup */. The restriction of the data to values of x/sub T/ (x/sub T/ = 2p/sub T// ..sqrt..s ) greater than 0.4 enriches the sample with hard collisions of valence quarks. Asymmetries about theta/sup */ = 90/sup 0/ reflect the presence of neutrons in the target nuclei. The variation of the atomic-weight dependence parameter ..cap alpha.. with production angle is discussed in the context of the phenomenology of nucleonic structure within nuclei. We also extrapolate our measurements to a ''deuteron'' target to minimize nuclear effects and compare the result to QCD calculations.
Authors: ; ; ; ; ; ; ; ; ; ;
Publication Date:
OSTI Identifier:7244218
Resource Type:Journal Article
Resource Relation:Journal Name: Phys. Rev. D; (United States); Journal Volume: 34:9
Research Org:Columbia University, New York, New York 10027
Country of Publication:United States
Language:English
Subject: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BERYLLIUM 9 TARGET; PROTON-NUCLEON INTERACTIONS; COPPER; HADRONS; PARTICLE PRODUCTION; INCLUSIVE INTERACTIONS; TUNGSTEN; ANGULAR DISTRIBUTION; CROSS SECTIONS; FRAGMENTATION; GEV RANGE 100-1000; PARTICLE STRUCTURE; PROTON REACTIONS; QUANTUM CHROMODYNAMICS; TRANSVERSE MOMENTUM; BARYON REACTIONS; BARYON-BARYON INTERACTIONS; CHARGED-PARTICLE REACTIONS; DISTRIBUTION; ELEMENTARY PARTICLES; ELEMENTS; ENERGY RANGE; FIELD THEORIES; GEV RANGE; HADRON REACTIONS; HADRON-HADRON INTERACTIONS; INTERACTIONS; LINEAR MOMENTUM; METALS; NUCLEAR REACTIONS; NUCLEON REACTIONS; NUCLEON-NUCLEON INTERACTIONS; PARTICLE INTERACTIONS; QUANTUM FIELD THEORY; TARGETS; TRANSITION ELEMENTS 645103* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties