Europhys. Lett.
Volume 63, Number 6, September 2003
Page(s) 805 - 811
Section Nuclear physics
Published online 01 November 2003
DOI: 10.1209/epl/i2003-00497-y
Europhys. Lett., 63 (6) , pp. 805-811 (2003)

Self-affinity and phase transition study in target fragmentation of $\chem{{}^{28}Si}$- $\chem{AgBr}$ interactions at 14.5 $\un{\acro{\textit{A}}GeV}$

D. Ghosh, A. Deb, S. Bhattacharyya and J. Ghosh

Nuclear and Particle Physics Research Centre, Department of Physics Jadavpur University - Kolkata 700 032, India

(Received 3 February 2003; accepted in final form 11 July 2003)

This paper reports the first evidence of non-thermal phase transition in the target fragmentation of $\chem{{}^{28}Si}$- $\chem{AgBr}$ interactions at 14.5 $\un{\textit{A}GeV}$. Factorial moment analysis has been performed in two dimensions taking into consideration the anisotropicity of the phase space. A signal of non-thermal phase transition is obtained by carrying out the investigation at that partitioning of phase space where the anisotropic scaling (self-affinity) behavior of dynamical fluctuation is best revealed. A signal of multifractality is also observed from the knowledge of anomalous fractal dimension dq extracted from the intermittency exponent $\alpha_q$ at the anisotropic phase space scenario.

25.75.-q - Relativistic heavy-ion collisions.
25.70.Mn - Projectile and target fragmentation.
24.60.Ky - Fluctuation phenomena.

© EDP Sciences 2003