Speaker
Dr
Yaxian MAO
(Vanderbilt University)
Description
We present measurements of the jet fragmentation functions and transverse momentum profiles (shapes) in PbPb collisions at 2.76 TeV per nucleon-pair center of mass energy with the CMS detector. Jets are reconstructed by the anti-kT sequential clustering algorithm with a resolution parameter of 0.3, using particle-flow objects that combine tracking and calorimetric information. In this talk the jet properties of inclusive jets with transverse momentum pT > 100 GeV/c in PbPb collisions are measured for reconstructed charged particles with pT > 1 GeV/c in a cone of radius sqrt((Δ φ)^2 + ( Δ η)^2)=0.3 around the jet axis. A data sample of PbPb collisions collected in 2011 at a center-of-mass energy of sqrt{sNN}= 2.76 TeV corresponding to an integrated luminosity of 150 µb^-1 is used. The results for PbPb collisions as a function of collision centrality are compared to reference distributions based on the full 2013 pp statistics collected at the same collision energy. Centrality-dependent modifications of the fragmentation functions and shapes are revealed.
Primary author
Dr
Yaxian MAO
(Vanderbilt University)
