Studies of the hydrodynamic evolution of matter produced in fluctuations in p-barp collisions and in ultrarelativistic nuclear collisions. II. Transverse-momentum distributions

Journal Article · Sat Nov 01 04:00:00 EST 1986 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.34.2755· OSTI ID:7166811

Kataja, M; Ruuskanen, P V; McLerran, L D; von Gersdorff, H

We study solutions to the hydrodynamic equations appropriate for ultrarelativistic nuclear collisions. We find that the matter produced in such collisions spends time t>30 fm/c at temperatures larger than 150 MeV. The transverse momentum of protons, kaons, and pions is computed in the central region of ultrarelativistic nuclear collisions. Assuming Bjorken's initial conditions for the hydrodynamic equations, and a bag-model equation of state, we show that the transverse-momentum distribution as a function of dN/dy does reflect properties of the equation of state. We demonstrate that such a distribution approximately scales as a function of (1/A)dN/dy. The relation between p/sub t/ and dN/dy is shown to be significantly altered under different assumptions about the equation of state. The transverse-momentum distribution of heavy hadrons is shown to be much enhanced relative to that of light pions. These distributions are little changed by differences in the assumptions about the initial transverse density and velocity profile. We are unable to fit the observed correlation between p/sub t/ and dE/dy observed in the Japanese-American Cooperative Emulsion Experiment.

• Research Organization: Physics Department, University of Jyvaeskylae, Seminaarinkatu 15, SF-40100, Jyvaeskylae, Finland
• OSTI ID: 7166811
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 34:9; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645204* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions & Properties
653003 -- Nuclear Theory-- Nuclear Reactions & Scattering
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BAG MODEL
BARYON-BARYON INTERACTIONS
CHARGED-PARTICLE REACTIONS
COMPOSITE MODELS
ENERGY RANGE
EQUATIONS
EQUATIONS OF STATE
EXTENDED PARTICLE MODEL
HADRON-HADRON INTERACTIONS
HEAVY ION REACTIONS
HYDRODYNAMIC MODEL
INTERACTIONS
LINEAR MOMENTUM
MATHEMATICAL MODELS
MATTER
MULTIPLICITY
NUCLEAR REACTIONS
NUCLEON-ANTINUCLEON INTERACTIONS
NUCLEON-NUCLEON INTERACTIONS
NUMERICAL SOLUTION
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PROTON-ANTIPROTON INTERACTIONS
QUARK MATTER
QUARK MODEL
RELATIVISTIC RANGE
STATISTICAL MODELS
THERMODYNAMIC MODEL
TRANSVERSE MOMENTUM