A–dependence in dilepton rapidity distributions: parton model and dipole approach analysis

Some non-trivial features of the QCD-improved parton model relevant to applications on heavy particle production and semi-hard (small-x) processes of interest to collider physics are reviewed. The underlying ideas are illustrated by a simple example. Limitations of the naive parton formula as well as first order corrections and subtractions to it are dis-cussed in a quantitative way. The behavior of parton distribution functions at small x and for heavy quarks are discussed. Recent work on possible impact of unconventional small-x behavior of the parton distributions on small-x physics at SSC and Tevatron are summarized. The Drell-Yan process is found to be particularly sensitive to the small x dependence of parton distributions. Measurements of this process at the Tevatron can provide powerful constraints on the expected rates of semi-hard processes at the SSC.

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Applications of the Dual-Parton Model to High-Energy Multiparticle Processes

Physical Review D ◽

10.1103/physrevd.6.894 ◽

1972 ◽

Vol 6 (3) ◽

pp. 894-900 ◽

Cited By ~ 2

Author(s):

Leonard Susskind

Keyword(s):

Parton Model ◽

High Energy ◽

Dual Parton Model

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Hadron distributions in the reactions hadron + hadron → lepton pair + hadrons and two virtual photons → hadrons, and tests of the parton model

Physical Review D ◽

10.1103/physrevd.9.1453 ◽

1974 ◽

Vol 9 (5) ◽

pp. 1453-1458 ◽

Cited By ~ 2

Author(s):

Min-Shih Chen

Keyword(s):

Parton Model ◽

Lepton Pair ◽

Virtual Photons

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Semi-inclusive rapidity distributions from entropy maximization

Physical Review D ◽

10.1103/physrevd.38.2288 ◽

1988 ◽

Vol 38 (7) ◽

pp. 2288-2290 ◽

Cited By ~ 4

Author(s):

Fujio Takagi ◽

Tatsuo Tsukamoto

Keyword(s):

Entropy Maximization ◽

Rapidity Distributions

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THE HYDRODYNAMIC DESCRIPTION OF THE ENERGY AND CENTRALITY DEPENDENCES OF THE PSEUDORAPIDITY DISTRIBUTIONS OF THE PRODUCED CHARGED PARTICLES IN Au+Au COLLISIONS

International Journal of Modern Physics E ◽

10.1142/s0218301313500699 ◽

2013 ◽

Vol 22 (09) ◽

pp. 1350069 ◽

Cited By ~ 3

Author(s):

ZHIJIN JIANG ◽

QINGGUANG LI ◽

GUANXIANG JIANG

Keyword(s):

Hydrodynamic Model ◽

Charged Particles ◽

Heavy Ion ◽

High Energy ◽

Hydrodynamic Description ◽

Gaussian Form ◽

Ion Collisions ◽

Phobos Collaboration ◽

Rapidity Distributions ◽

Pseudorapidity Distributions

By using the revised Landau hydrodynamic model and taking into account the effect of leading particles, we discuss the pseudorapidity distributions of produced charged particles in high energy heavy-ion collisions. The charged particles resulted from the freeze-out of the matter produced in collisions possess the Gaussian-like rapidity distributions. The leading particles are assumed having the rapidity distributions of the Gaussian form with the normalization constant being equal to the number of participants, which can be figured out in theory. It is found that the results from the revised Landau hydrodynamic model together with the contributions from leading particles are well consistent with the experimental data carried out by BNL-RHIC-PHOBOS Collaboration in different centrality Au + Au collisions at energies of [Formula: see text], 130 and 62.4 GeV , respectively.

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