Transverse momentum distribution with radial flow in relativistic diffusion model
نویسنده
چکیده
Abstract. Large transverse momentum distributions of identified particles observed at RHIC are analyzed by a relativistic stochastic model in the three dimensional (non-Euclidean) rapidity space. A distribution function obtained from the model is Gaussian-like in radial rapidity. It can well describe observed transverse momentum pT distributions. Estimation of radial flow is made from the analysis of pT distributions for p̄ in Au + Au Collisions. Temperatures are estimated from observed large pT distributions under the assumption that the distribution function approaches to the Maxwell-Boltzmann distribution in the lower momentum limit. Power-law behavior of large pT distribution is also derived from the model.
منابع مشابه
Relativistic diffusion model and analysis of large transverse momentum distributions
Abstract. In order to describe large transverse momentum (pT ) distributions observed in high energy nucleus-nucleus collisions, a stochastic model in the three dimensional rapidity space is introduced. The fundamental solution of the radial symmetric diffusion equation is Gaussianlike in radial rapidity. We can also derive a pT or radial rapidity distribution function, where a distribution of ...
متن کاملExcitation Functions of Stopping Power and Flow in Relativistic Heavy-Ion Collisions
Using a relativistic transport (ART) model, we study the stopping power, the formation of superdense hadronic matter as well as the strength of transverse and radial flow in central Au+Au collisions at beam momentum from 2 to 12 GeV/c per nucleon. We find that complete stopping is achieved in the whole beam momentum range. In particular, the proton rapidity distribution scaled by the beam rapid...
متن کاملTwo particle rapidity, transverse momentum, and azimuthal correlations in relativistic nuclear collisions and transverse radial expansion
At the very first stage of an ultra-relativistic nucleus-nucleus collision new particles are produced in individual nucleon-nucleon collisions. In the transverse plane, all particles from a single NN collision are initially located at the same position. The subsequent transverse radial expansion of the system creates strong position-momentum correlations and leads to characteristic rapidity, tr...
متن کاملdependence of transverse flow in relativistic heavy - ion collisions
The strength of transverse flow is examined as a function of transverse momentum p t using a simple, transversely moving thermal model and a more realistic, relativistic transport model (ART). It is shown that the p t dependence reveals useful information about the collective flow that is complementary to that obtained from the standard in-plane transverse momentum analysis. Interesting feature...
متن کاملth / 0 20 80 68 v 1 2 9 A ug 2 00 2 1 Collective flow and HBT radii from a full 3 D hydrodynamic model with early chemical freeze out
From the particle ratios and the transverse momentum spectra of hadrons in relativistic heavy ion collisions, one can obtain chemical freeze-out temperature T ch and thermal freeze-out temperature T th through the analyses of statistical models [1]. These temperatures are usually different from each other at the AGS, SPS and RHIC energies, i.e., T ch ∼ 160-200 MeV while T th ∼ 100-140 MeV. This...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2005