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Production of direct photons and neutral mesons at large transverse momenta by [pi][sup [minus]] and [ital p] beams at 500 GeV/[ital c]

Journal Article · · Physical Review, D (Particles Fields); (United States)
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  1. University of California (enDavis, Davis, California 95616 (United States)); University of Delhi, Delhi 11 00 07 (India); Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (Uni
+ Show Author Affiliations
We present results from the initial run of Fermilab experiment E706. The data include incident [pi][sup [minus]] and [ital p] beams at 500 GeV/[ital c] on Be and Cu targets, and span the kinematic ranges of transverse momentum and rapidity of 3.5[le][ital p][sub [ital T]][le]10 GeV/[ital c] and [minus]0.7[le][ital y][sub c.m.][le]0.7, respectively. We have measured cross sections for [pi][sup 0] and direct-photon production, as well as the [eta]/[pi][sup 0] production ratio. From the data on Be and Cu, we have extracted the nuclear dependence of [pi][sup 0] production, parametrized as [ital A][sup [alpha]]. The cross sections are compared with next-to-leading-log QCD predictions for different choices of the QCD momentum scales and several sets of parton distribution functions.
OSTI ID:
6523107
Journal Information:
Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 48:1; ISSN 0556-2821; ISSN PRVDAQ
Country of Publication:
United States
Language:
English

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Related Subjects

662230 -- Quantum Chromodynamics-- (1992-)
662300* -- Specific Interactions
Decays & Processes-- (1992-)
663430 -- Nucleon-Induced Reactions & Scattering-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BEAMS
BERYLLIUM 9 TARGET
BOSONS
COPPER 64 TARGET
CROSS SECTIONS
DISTRIBUTION FUNCTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
ETA MESONS
FIELD THEORIES
FUNCTIONS
GEV RANGE
GEV RANGE 100-1000
HADRONS
INCLUSIVE INTERACTIONS
INTERACTIONS
LINEAR MOMENTUM
MASSLESS PARTICLES
MESON BEAMS
MESONS
NUCLEON BEAMS
PARTICLE BEAMS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PARTICLE RAPIDITY
PARTONS
PHOTONS
PION BEAMS
PIONS
PIONS NEUTRAL
POSTULATED PARTICLES
PROTON BEAMS
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
TARGETS
TRANSVERSE MOMENTUM