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

9th International Workshop on High-pT Physics at LHC

Bencédi, Gyula^1 ; Barnaföldi, Gergely Gábor^1 ; Molnár, Levente^2

Wigner Research Centre for Physics, Hungarian Academy of Sciences, Budapest, Hungary^1

Institut Pluridisciplinaire Hubert Curien, Strasbourg, France^2

关键词: Collider energies;    Correlation function;    Hadron correlations;    Heavy ion collision;    Particle correlations;    Particle identifications;    Parton energy loss;    Two particle correlation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/589/1/012001/pdf
DOI  :  10.1088/1742-6596/589/1/012001

来源: IOP

【 摘 要 】

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 measurements in heavy- ion collisions have mainly focused on studies of collective (flow) effects at low-pTand parton energy loss via jet quenching in the high-pTregime. This was usually done without event-byevent 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 conservation 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 7 TeV. HIJING was used to generate 0 - 10% central Pb-Pb events at 2.76 TeV. We found that the extracted identified associated hadron spectra for charged pion, kaon, and proton show identified trigger-hadron dependent splitting. Moreover, the identified trigger-hadron dependent correlation functions vary in different pTbins, which may show the presence of collective/nuclear effects.