Mir Hashim Rasool

Multiplicities of Forward-Backward Relativistic Charged Particles Produced in ^(32)S-Emulsion Interactions at 200 AGeV/c

Experimental data on relativistic shower particles emitted in the forward (θ_(lab) ＜ 90) and backward (θ_(lab) ≥ 90) hemispheres in the interactions of a 200 AGeV/c ^(32)S beam with emulsion nuclei was obtained. The experimental multiplicity distributions (N^F_s, N^B_s ) of relativistic shower particles emitted in the forward (θ_(lab) ＜ 90) and backward (θ_(lab) ≥ 90) hemispheres produced in the interactions of a ^(32)S projectile with CNO, AgBr, and Em are presented and analyzed. The experimental results have been compared with the data generated with the computer code FRITIOF based on the Lund Monte Carlo Model. The FRITIOF model is useful in classifying the particle emission into the forward hemisphere (FHS) and backward hemisphere (BHS). The correlations between the relativistic charged particles emitted in the forward and backward hemispheres have been investigated. The average multiplicities of particles emitted in the forward and backward hemispheres have been studied as a function of the projectile mass number. Also the asymmetry factor (m = N^B_s−N^F_s) m-distribution for different grey particle intervals i.e., N_g intervals is studied, and the ratio N^F_s/N^B_s as a function of N_g has been studied to show a Gaussian behaviour. Finally the scaling of the multiplicity distributions of the relativistic shower particles produced in both the forward and backward hemispheres is observed to obey the KNO scaling law.

Study of Deconfinement Phase Transition in Heavy Ion Collisions at BNL Energies

Abstract — The Scaled factorial moments (SFMs) of multiplicity distribution are used to study the deconfinement phase transition in high energy heavy-ion collisions. In the present article we studied the Renyi dimensions and multifractal spectrum in the interaction of 28 S-emulsion collisions at 14.6A GeV to investigate non thermal phase transitions during such collisions. Index Terms — Novel state of matter, quark-gluon plasma (QGP), scaled factorial moments (SFMs). I. I NTRODUCTION During last couple of years, different nuclei have been accelerated to relativistic energies and brought to collisions with a great variety of target nuclei. An ultimate aim of studying nucleus – nucleus (A-A) collisions is to investigate for a phenomena connecting with large densities obtained in such nuclear collisions. So due to this one can obtained an opportunity to explore strongly interacting matter at energy densities unprecedented in a laboratory, which eventually gives an evidence for the existence of quark-gluon plasma (QGP). The QGP is a novel state of matter in which quarks and gluons are no longer confined to volumes of hadronic dimensions. In deep inelastic scattering experiments, it has already been revealed that quarks at very short distances move freely, which is referred to as the asymptotic freedom. Quantum Chromo-dynamics (QCD) describes the strong interactions of quarks and gluons [1]. The experimental observation of large rapidity fluctuations in relativistic heavy ion collisions by R. C. Hwa and J. C. Pan [2], [3] using the method of multifractal moments method,

Multiplicity Characteristics of Forward-Backward Emitted Particles in Heavy-Ion Interactions at SPS Energies

The experimental multiplicity distributions of relativistic shower particles emitted in forward (\(\theta _{lab} \) and \( \) on \(N_h\) has been described by a linear linear relation in which the data is found to exhibit a positive correlation.