Rapidity and Pseudorapidity Distributions of theVarious Hadron-Species Produced in High EnergyNuclear Collisions: A Systematic Approach

Abstract

With the help of a phenomenological approach outlined in the text in some detail, we have dealt here with the description of the plots on rapidity and pseudorapidity spectra of some hadron-secondaries produced in various nucleus-nucleus interactions at high energies. The agreement between the measured data and the attempted fits are, on the whole, modestly satisfactory excepting a very narrow central region in the vicinity of y = η = 0. At last, hints to how the steps suggested in the main body of the text to proceed with the description of the measured data given in the plots could lead finally to a somewhat systematic methodology have also been made.

Rapidity Distribution within Landau hydrodynamical model and EPOS event-generator at RHIC Energies

“…Landau model results from Equation 12shows the same behavior. Finally, the EPOS 1.99 eventgenerato [45,46] results seem to coincide with experimental data [7,[48][49][50][51][52][53][54][55][56][57][58][59] and to the fitted results from Landau hydrodynamical model.…”

“…The current study is based on a replication of the rapidity distribution experiment results of dN/dy of π − , π + , k − , k + , p, and p at RHIC energies for Au + Au collisions at 62.4 GeV and 200 GeV [7,[48][49][50][51][52][53][54][55][56][57][58][59][60][61]. We also compare our results to those estimated from the EPOS 1.99 event-generator [45,46].…”

“…Fig. 1 shows the rapidity distribution dN/dy vs rapidity y for the well-identified hadrons π − , π + , k − , k + , p, and p measured in Au+Au central collisions from BRAHMS experiment data, at 200 GeV [51][52][53][54][55][56] at rapidity range 0 < y < 5 while the right points at range −5 < y < 0 are the reflection with respect to the mid-rapidity. Experimental data are represented as symbols, while the Landau results are represented as dashed lines and the result from large statistical ensemble of 100000 events of the EPOS 1.99 event-generator [45,46] are depicted as solid lines.…”

“…As a result, we argue that the Landau hydrodynamical approach's statistical assumptions alone may be applied to a wide range of rapidity. The experimental results [7,[48][49][50][51][52][53][54][55][55][56][57][58][59] (symbols) from Au+Au central collisions, at 200 GeV, are compared to the Cosmic Ray Monte-carlo (CRMC EPOS 1.99) event-generator (solid lines), section 2 2.2, and also fitted to the Landau hydrodynamical approach (dashed lines), Eq. ( 12).…”