Jets in pp collisions at RHIC and Monte Carlo study of z-scaling

TL;DR

This paper investigates how different cone algorithm parameters affect jet reconstruction in proton-proton collisions at RHIC energy, using Monte Carlo simulations and comparing results with z-scaling predictions and experimental data.

Contribution

It provides a detailed analysis of the impact of cone algorithm parameters on jet reconstruction efficiency and compares Monte Carlo results with z-scaling and experimental data.

Findings

The slope parameter beta is independent of algorithm parameters over ETJet=25-60 GeV.

Reconstruction efficiency varies with Ecut, Eseed, R, especially below 25 GeV.

Invariant cross section shows strong dependence on algorithm parameters at lower energies.

Abstract

Impact of the cone algorithm parameters Ecut, Eseed, R on the efficiency and characteristics of the reconstructed jets in p-p collisions at the energy sqrt s = 200 GeV is studied. The PYTHIA Monte Carlo generator is used for event generation. The dependence of dijet production fraction on the parton transverse momentum at different algorithm parameters is analyzed. The dependence of reconstruction efficiency of parton energy in dijet events and two leading jets in N-jet events on Ecut, Eseed, R is studied. Monte Carlo results are compared with predictions made in the framework of z-scaling and experimental data obtained at RHIC. The independence of the slope parameter beta of the scaling function, on the algorithm parameters over the energy range ETJet=25-60 GeV is found. The strong dependence of the invariant cross section and the slope parameter on the algorithm parameters with decreasing of ETJet for ETJet<25 GeV is observed.