Balance functions of (un)identified hadrons in Pb-Pb, p-Pb, and pp collisions at the LHC
Abstract
In ultrarelativistic heavy-ion collisions, correlations of particles
with opposite quantum numbers provide insight into quark production
mechanisms and time scales, collective motion, and re-scattering in the
hadronic phase. The longitudinal and azimuthal widths of balance
functions for charged kaons and charged pions are used to examine the
two-wave quark production model proposed to explain quark-antiquark
production within the QGP, which predicts a large increase in up and
down quark pairs relative to strange quark pairs around the time of
hadronization. Balance functions are also analyzed in small collision
systems such as p-Pb and pp to study fragmentation effects and possible
collective effects in high-multiplicity events. A comprehensive set of
balance functions has been measured using the ALICE detector, including
results for unidentified hadrons in Pb-Pb and p-Pb collisions at root
s(NN) = 5.02 TeV, for charged pions in Pb-Pb collisions at root s(NN) =
2.76 TeV, p-Pb collisions at root s(NN) = 5.02 TeV and pp collisions at
root s = 7 TeV, and for charged kaons in Pb-Pb collisions at root s(NN)
= 2.76 TeV. The first balance function yield results are also presented.
Collections

DSpace@Karatay by Karatay University Institutional Repository is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 Unported License..