Speaker
Description
It has been established that the Quark-Gluon Plasma (QGP), an exotic state
of deconfined matter, is created in high-energy heavy-ion collisions. Jets are a
very important probe of this hot and dense nuclear matter, since they emerge
from the fragmentation of hard-scattered partons (quarks and gluons) that are
created during the early stages of the collisions. Therefore, measurements of
modifications to jet properties in heavy-ion collisions relative to those in proton-
proton collisions can provide insight into understanding interactions between
hard-scattered partons and the QGP.
This talk aims to present recent results of jet production in Au+Au collisions
at √s NN = 200 GeV by the STAR Collaboration at the Relativistic Heavy Ion
Collider. We will focus on the measurement of inclusive jet production as a
function of transverse momentum (p T ) of jets and collision centrality. Jets
are reconstructed using charged tracks from the Time-Projection Chamber and
neutral energy from the Barrel Electromagnetic Calorimeter towers, using the
anti-k T algorithm with jet resolution parameter R = 0.2, 0.3, and 0.4. The
large combinatorial background is suppressed by requiring a high-p T leading
hadron in accepted jet candidates. Jet yield suppression is observed for central
relative to peripheral Au+Au collisions, which is attributed to medium-induced
parton energy loss. The measured distributions are compared to theoretical
calculations incorporating jet quenching, which will improve our understanding
of medium-induced energy loss of jets at RHIC energies.
