Parton rescattering effect on particle production in ultra-relativistic p+p collisions

Abstract

The parton rescattering effect on the charged particle production in ultra-relativistic p+p collisions is studied by the parton and hadron cascade model, PACIAE, based on PYTHIA. We have calculated charged particle pseudorapidity density ($d{N}_{ch}/d\eta$) at mid-rapidity and the pseudorapidity distribution in inelastic and non-single diffractive p+p collisions at $\sqrt{s}$=200, 900, 5500, and 14000 GeV with the PYTHIA and PACIAE models. The calculated results of $\sqrt{s}$=900 GeV are well compared with the ALICE data. The calculated $d{N}_{ch}/d\eta$ as a function of center-of-mass energy well meets with the experimental data as well. Comparing the PYTHIA results (without parton rescattering) with the PACIAE results (with parton rescattering), it turned out that the parton rescattering effect plays an important role and this effect increases with increasing center-of-mass energy.

4 pages, 3 figures

References in corpus (7)

• PYTHIA 6.4 Physics and Manual
• Direct observation of dijets in central Au+Au collisions at sqrt(s_NN) = 200 GeV
• First proton-proton collisions at the LHC as observed with the ALICE detector: measurement of the charged particle pseudorapidity density at $\sqrt{s}$ = 900 GeV
• On the long-range correlations in hadron-nucleus collisions
• Full Jet Reconstruction in Heavy Ion Collisions
• Centrality bin size dependence of multiplicity correlation in central Au+Au collisions at $\sqrt{s_{N}N}$=200 GeV}
• PACIAE Model Predictions for Pb+Pb Collisions at LHC Compared to the Au+Au Collisions at RHIC