A Study of Erraticity of Rapidity-Gaps in 28Si-AgBr Collisions at 14.6A GeV M. Ayaz Ahmad, Mir Hashim Rasool and Shafiq Ahmad Physics Department, Aligarh Muslim University, Aligarh, 202002, INDIA email:-
[email protected]
Abstract: A systematic study of event-to-event fluctuations proposed for low multiplicity events has been investigated using the rapidity-gap method by analyzing the data of relativistic shower particles produced in
28
Si-AgBr interactions at 14.6A GeV. It may be observed that
the two new quantities, Sq and q are better parameters, which are used to describe erraticity, will be examined quantitatively for the present data. It is found that S q and q deviate significantly from 1 in pseudorapidity and azimuthal spaces. There is clear evidence that signifies the presence of event-to-event fluctuations in the multiparticle production for our data. The experimental results on the erraticity exhibit a remarkable closeness to analogous data obtained from UrQMD model. Finally, the investigation gives evidence in favour of erratic fluctuations of rapidity-gaps of produced pions in relativistic nuclear collisions. The main objective of relativistic heavy ion experiments at AGS, CERN SPS and relativistic heavy ion collider, RHIC, at Brookhaven National Laboratory is to provide an opportunity to investigate strongly interacting matter at energy densities unprecedented in a laboratory, which ultimately gives an evidence for the quark-gluon plasma (QGP) formation. The QGP is a 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 Chromodynamics (QCD) describes the strong interactions of quarks and gluons. A variety of possible signatures for the transient existence of a deconfined state of matter in nucleusnucleus (A-A) collision has been proposed theoretically and studied experimentally by various workers [2].
