Speaker
Martin Spousta
(Columbia University and Charles University)
Description
Measurements of charged particle fragmentation functions of jets
produced in ultra-relativistic nuclear collisions are expected to
provide insight on the modification of parton showers in the hot and
dense medium created in the collisions. ATLAS has measured jets at
sqrt{sNN}=2.76 TeV in Pb+Pb collisions using data collected during
2011 run and in p+p collisions using 2013 run. Jets were reconstructed
using the anti-kt algorithm with distance parameter values R=0.2, 0.3,
and 0.4. Distributions of charged particle transverse momentum and
longitudinal momentum fraction are reported for seven bins in
collision centrality. The ratios of fragmentation distributions with
respect to the p+p reference fragmentation functions are
evaluated. The jet structure is further investigated in terms of
correlations of an angular position and momenta of a particle within
jet.
| On behalf of collaboration: | ATLAS |
|---|
Primary author
Martin Spousta
(Columbia University and Charles University)
