Speaker
Jan Rusnak
(Nuclear Physics Institute Prague)
Description
Jet interaction in the medium provides sensitive observables to study
properties of the hot and dense nuclear matter created in heavy-ion
collisions. However, due to the large and fluctuating background, full jet
reconstruction in heavy-ion collisions is an extremely challenging
task.
In this poster, we present a new measurement of the inclusive spectra
of reconstructed jets in central Au+Au collisions at
$\sqrt{s_{NN}}$=200 GeV by the STAR collaboration at RHIC. Jets are
reconstructed using charged tracks from the time projection chamber.
We utilize an experimental technique in which jet reconstruction
is stable against the emission of an additional soft hadron, even in
the high-multiplicity environment. In this technique the large combinatorial
background is suppressed by a threshold cut on the leading hadron of each
jet candidate. This cut, however, is not safe against collinear splitting
of hard partons and thus is systematically explored.
The jet spectra are fully corrected for background fluctuations and
detector effects
utilizing two different unfolding techniques. We compare this measurement to the
jet spectrum in p+p collisions and to model predictions, as well as to
the results
from LHC experiments.
| On behalf of collaboration: | STAR |
|---|
Author
Jan Rusnak
(Nuclear Physics Institute Prague)
