Monte Carlo Studies of Identified Two-particle Correlations in p-p and Pb-Pb Collisions

Bencédi, Gyula and Barnaföldi, Gergely Gábor and Molnár, Levente (2015) Monte Carlo Studies of Identified Two-particle Correlations in p-p and Pb-Pb Collisions. JOURNAL OF PHYSICS-CONFERENCE SERIES, 589 (1). ISSN 1742-6588

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Abstract

Azimuthal particle correlations have been extensively studied in the past at various collider energies in p-p, p-A, and A-A collisions. Hadron-correlation mea- surements in heavy-ion collisions have mainly focused on studies of collective (flow) effects at low-pT and parton energy loss via jet quenching in the high-pT regime. This was usually done without event-by-event particle identification. In this paper, we present two-particle correlations with identified trigger hadrons and identified associated hadrons at mid-rapidity in Monte Carlo generated events. The primary purpose of this study was to investigate the effect of quantum number con- servation and the flavour balance during parton fragmentation and hadronization. The simulated p-p events were generated with PYTHIA 6.4 with the Perugia-0 tune at √s = 7 TeV. HIJING was used to generate 0 − 10% central Pb-Pb events at √sNN = 2.76 TeV. We found that the extracted identified associated hadron spectra for charged pion, kaon, and proton show identified trigger-hadron dependent split- ting. Moreover, the identified trigger-hadron dependent correlation functions vary in different pT bins, which may show the presence of collective/nuclear effects.

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