Dependence of charged particle pseudorapidity distributions on centrality and energy inp(d)Acollisions at high energies

Abstract

The pseudorapidity distributions of charged particles produced in deuteron-gold (d-Au) and proton-emulsion (p-Em) collisions at high energies are studied in the framework of the two-cylinder model. The experimental results of nuclear reactions induced by protons and deuterons [p(d)A collisions] can be simply described by this model. The dependencies of parameter values on centrality for d-Au collisions and on nucleon-nucleon center-of-mass energy for p-Em collisions are obtained. The formula obtained by this model is a unified formula in the description of (pseudo)rapidity distributions of final-state particles produced in different interactions over an energy range from intermediate accelerator energy to ultrahigh cosmic-ray energy.

Multiparticle Production and Initial Quasitemperature from Proton-Induced Carbon Collisions at pLab=31 GeV/c

“…6(a) 0.280 ± 0.004 0.40 ± 0.02 1.50 ± 0.10 1.20 ± 0.10 3.10 ± 0.10 2.70 ± 0.10 1.337 ± 0.020 118/9 0≤z<18 0.200 ± 0.005 0.40 ± 0.02 1.50 ± 0.08 1.20 ± 0.10 3.45 ± 0.10 2.00 ± 0.08 2.145 ± 0.100 86/7 0.127 ± 0.003 0.40 ± 0.01 1. 55…”

Comparing Standard Distribution and Its Tsallis Form of Transverse Momenta in High Energy Collisions

“…According to the multi-source model [6][7][8][9], a few emission sources of produced particles are assumed to form in interacting system due to different reaction mechanisms and/or data examples. For each emission source, the thermal model or other similar models and distributions can be used to perform calculation on the production of particles.…”

“…Different functions and methods are used by different researchers to describe rapidity and transverse momentum distributions as well as other distributions which can be measured in experiments [1][2][3][4][5]. Based on a multi-source thermal model [6][7][8][9], the rapidity and transverse momentum distributions obtained in experiments at different collision energies are studied by us in terms of two-cylinder, Rayleigh, Boltzmann, Tsallis, and other distributions. In particular, comparing with rapidity distribution, transverse momentum distribution contains more abundant information and attracts wider attentions.…”

“…Because of the same transverse momentum distribution being described by different functions to obtain values of different parameters, possible relations existed among different parameters can be studied. In this paper, based on the multi-source thermal model [6][7][8][9], the standard distribution (Boltzmann, Fermi-Dirac, and Bose-Einstein distributions) and its Tsallis form are used to describe the transverse momentum distribution of final-state particles produced in high energy nucleus-nucleus collisions. The excitation functions of effective temperatures obtained by the two distributions are extracted and the relation between the two effective temperatures is studied.…”

Pseudorapidity distributions of charged particles inp−p̄orp−pcollisions at high energies and predictions at ultrahigh energies

“…Mostly, y x distributes equably in [y P min , y P max ] or [y T min , y T max ]. In the final state, the normalized pseudorapidity distribution can be expressed as [39] …”