Abstract
A better understanding of initial conditions of nuclear interactions is one of the most important heavy ion physics problems. The paper considers these problems in the centrality selected interactions of light (C, O, Ne) – (beam) and heavy (Au, Pb) – (beam) ions with light (C/N/O) – (target) and heavy (Ag/Br) – (target) nuclei using the data of JINR-AGS-SPS target emulsion experiments with limited statistics. To reveal a possible system structure dependence, the analyses of E-by-E fluctuations on the longitudinal event shape and multiplicity have been performed, vertically and horizontally.
Highlights
A better understanding of initial conditions of nuclear interactions is one of the most important heavy ion physics problems
These approaches complement the previous results of our research group which have shown that there is a clear trend to the E-by-E fluctuation increasing with system size decreasing for central interactions of light-light, medium-light and heavy-heavy nuclei
The strong enhancement E-by-E fluctuations in the longitudinal event shape and multiplicity for the central collisions of (C, O, Ne) - + (C/N/O) - has been interpreted as the sign of intrinsic alpha-clustering in light nuclei
Summary
A better understanding of initial conditions of nuclear interactions is one of the most important heavy ion physics problems. Interesting results of these studies have been obtained in the new collider and target experiments and considered at recent conferences. The SPS NA61/SHINE fixed-target experiment has performed the comparative analyses of the scaled variance of charged hadron multiplicity in proton-proton, Be-Be, and Ar-Sc collisions [5]. A wide range of experiments on the interactions of both light and heavy nuclei in the fixed-target and collider modes is being prepared at NICA collaborations [6]. New LHCb experiments with gas targets [7] have a large potential athonadsprsAoubcuec-Aeasnusdfauctllhy√arcsaac=rtrei4er.id5zeoGuthet Vea minineittithaholedsftoralatoemgoeicfwaholeraaknvaoylfyistohinseiofinftxieenrdtae-crttaaiorcgtniesot.ncBsoNAnfiLl-gASuuTraAattiRo√ncsool=flad4be.ot9eracGttioeoVrns [8]
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