LONG RANGE HADRON DENSITY FLUCTUATIONS AT SOFT P_T IN AU + AU COLLISIONS AT RHIC

Abstract

Dynamic fluctuations in the local density of non-identified hadron tracks reconstructed in the STAR TPC are studied using the discrete wavelet transform power spectrum technique which involves mixed event reference sample comparison. The two-dimensional event-by-event analysis is performed in pseudo-rapidity η and azimuthal angle φ in bins of transverse momentum p T . HIJING simulations indicate that jets and mini-jets result in characteristic signals, visible already at soft p T , when the dynamic texture analysis is applied. In this analysis, the discrepancy between the experiment and the HIJING expectations for Au+Au at √ S NN = 200 GeV is most prominent in the central collisions where we observe the long range fluctuations to be enhanced at low p T , and suppressed above p T = 0.6 GeV

Wavelet analysis of angular distributions of secondary particles in high-energy nucleus-nucleus interactions: Irregularity of particle pseudorapidity distributions

“…Structures were found in the angular distributions of secondary particles that can be interpreted as irradiation of Cherenkov gluons. The last publications in this research are devoted to experimental search for the disoriented chiral condensate in nucleus-nucleus interactions [11].…”