New properties of z-scaling: flavor independence and saturation at low z

Abstract

Experimental data on inclusive cross sections of particles produced in high energy proton-(anti)proton collisions at ISR, RHIC, and Tevatron are analyzed in the framework of $z$-scaling. New features of the scaling function $\psi (z)$ are established. These are flavor independence of $\psi (z)$ including particles with heavy flavor content and saturation at low $z$. The flavor independence means that the shape of the scaling function $\psi (z)$ is the same for different hadron species. The saturation corresponds to flattening of $\psi (z)$ for $z<0.1$. Relations of model parameters used in data $z$-presentation with some thermodynamical quantities (entropy, specific heat, temperature) are discussed. It is shown that behavior of the particle spectra at low $z$ is controlled by a parameter $c$ interpreted as a specific heat of the created medium associated with production of the inclusive particle. The saturation regime of $\psi (z)$ observed at low $z$ is assumed to be preferable in searching for phase transitions of hadron matter and for study of non-perturbative QCD in high energy proton-(anti)proton collisions at U70, RHIC, Tevatron, and LHC.

20 pages, 17 figures

References in corpus (3)

• Measurements of Strange Particle Production in $p+p$ Collisions at $\sqrt{s}$= 200 GeV
• Identified hadron spectra at large transverse momentum in p+p and d+Au collisions at \sqrts_NN = 200 GeV
• Generalized z-scaling in proton-proton collisions at high energies

Cited by in corpus (5)

• Self-similarity of negative particle production from the Beam Energy Scan Program at STAR
• Self-similarity of strangeness production in pp collisions at RHIC
• The Tsallis entropy and the BKT-like phase transition in the impact parameter space for $pp$ and $\bar{p}p$ collisions
• On saturation of charged hadron production in pp collisions at LHC
• Self-similarity of proton spin and z-scaling