A study of fluctuations of voids in relativistic ion–ion collisions

Abstract

Event-by-event (ebe) fluctuations of hadronic patterns are investigated in terms of voids by analyzing the experimental data on 4.5, 14.5 and 60 A GeV/c 16 O-AgBr collisions. The findings are compared with the predictions of a multi-phase transport AMPT model. Dependence of voids on phase space bin width is examined in terms of two lowest moments of ebe fluctuations of voids, Gq and Sq. The findings reveal that scaling exponent estimated from the observed power-law behavior of the voids may be used to characterize the various properties of hadronic phase transition. The results also rule out occurrence of second-order quark-hadron phase transition at the projectile energies considered.

Entropy and Multifractality in Relativistic Ion-Ion Collisions

“…These events are taken from the emulsion experiments performed by EMU01 Collaboration [22,23,24,25]. The other relevant details of the data, like criteria of selection of events, classification of tracks, extraction of AgBr group of interactions, method of measuring the emission angle, θ of relativistic charged particles, etc., may be found elsewhere [1,6,22,26,27,28].…”

“…Six sets of events produced in collisions of 16 O, 28 Si, 32 S and 197 Au beams wih AgBr group of nuclei in emulsion at AGS and SPS energies, available in the laboratory are used in the present study. Details of these samples are presented in Table 1.…”