A search for the quark-hadron phase transition in simulated pp collisions at $$\sqrt{{\varvec{s}}}$$ = 13 TeV using UrQMD model by the scaled factorial moment method

Abstract

Charged particle multiplicity fluctuations in pp collisions at √ 𝑠 = 13 TeV have been studied by the method of scaled factorial moment for the minimum bias events generated by Ultra Relativistic Quantum Molecular Dynamics (UrQMD) model in the pseudo-rapidity (η), azimuthal angle (ϕ) and two dimensional anisotropic (η − ϕ) phase space. Strong intermittent type of fluctuations have been observed for the UrQMD simulated data. Systematic studies of intermittent fluctuations in terms of scaled factorial moments was utilized to extract the anomalous fractal dimension in the pseudo-rapidity (η), azimuthal angle (ϕ) and two dimensional anisotropic (η − ϕ) phase space. Search for the quark-hadron phase transition in the framework of Ginzburg-Landau theory of second-order phase transition by the analysis with the factorial moment method has also been performed.