Neutral-meson production in pp collisions at RHIC and QCD test of z scaling

Journal Article · Sun Mar 15 00:00:00 EDT 2009 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S106377880903020X· OSTI ID:21405975

Tokarev, M. V., E-mail: [e-mail].r ^[1]

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1. Joint Institute for Nuclear Research (Russian Federation)

New experimental data on inclusive cross section of neutral-vector-meson ({omega}{sup 0}, {phi}, K{sub S}{sup 0}) production in proton-proton collisions at {radical}s = 200 GeV obtained at RHIC are analyzed in the framework of z scaling. Properties of z-presentation are used to predict hadron yields over a wide range of transverse momentum p{sub T} and collisions energy {radical}s. The next-to-leading-order perturbative QCD calculations of inclusive cross sections of {pi}{sup 0} mesons produced in pp and p-bar collisions over a wide range of {radical}s and p{sub T} are compared with ISR, Sp-barpS, RHIC data and predictions of z scaling. The dependence of the spectra in p{sub T} and z presentations for different parton distribution and fragmentation functions is studied. The sensitivity of the obtained results to the choice of the renormalization ({mu}{sub R}), initial-state factorization ({mu}{sub F}), and final-state factorization (fragmentation) ({mu}{sub H}) scales is verified. It is shown that self-similar features of particle production dictated by the z scaling give strong restriction on the asymptotic behavior of the inclusive spectra in high-p{sub T} region.

• OSTI ID: 21405975
• Journal Information: Physics of Atomic Nuclei, Vol. 72, Issue 3; Other Information: DOI: 10.1134/S106377880903020X; Copyright (c) 2009 Pleiades Publishing, Ltd.; ISSN 1063-7788
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMPTOTIC SOLUTIONS
BROOKHAVEN RHIC
CROSS SECTIONS
DISTRIBUTION FUNCTIONS
EXPERIMENTAL DATA
FACTORIZATION
FRAGMENTATION
GEV RANGE
KAONS NEUTRAL SHORT-LIVED
PARTICLE PRODUCTION
PIONS NEUTRAL
PROTON-ANTIPROTON INTERACTIONS
PROTON-PROTON INTERACTIONS
QUANTUM CHROMODYNAMICS
RENORMALIZATION
SCALE DIMENSION
SENSITIVITY
TRANSVERSE MOMENTUM
VECTOR MESONS
ACCELERATORS
BARYON-BARYON INTERACTIONS
BOSONS
DATA
ELEMENTARY PARTICLES
ENERGY RANGE
FIELD THEORIES
FUNCTIONS
HADRON-HADRON INTERACTIONS
HADRONS
HEAVY ION ACCELERATORS
INFORMATION
INTERACTIONS
KAONS
KAONS NEUTRAL
LINEAR MOMENTUM
MATHEMATICAL SOLUTIONS
MESONS
NUCLEON-ANTINUCLEON INTERACTIONS
NUCLEON-NUCLEON INTERACTIONS
NUMERICAL DATA
PARTICLE INTERACTIONS
PIONS
PROTON-NUCLEON INTERACTIONS
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
STORAGE RINGS
STRANGE MESONS
STRANGE PARTICLES