Speaker
Prof.
Hanzhong Zhang
(IOPP)
Description
Nuclear modification factor $R_{AA}(p_{T})$ for large transverse momentum pion spectra in $Pb+Pb$ collisions at $\sqrt{s}=2.76$ TeV is predicted within the NLO perturbative QCD parton model. Effect of jet quenching is incorporated through medium modified fragmentation functions within the higher-twist approach. The jet transport parameter that controls medium modification is proportional to the initial parton density and the coefficient is fixed by the RHIC data on suppression of large $p_{T}$ hadron spectra. Data on charged hadron multiplicity $dN_{ch}/d\eta=1584 \pm 80$ in central $Pb+Pb$ collisions from the ALICE Experiment at the LHC are used to constrain the initial parton density both for determining the jet transport parameter and the 3+1D ideal hydrodynamic evolution of the bulk matter that is employed for the calculation of $R_{PbPb}(p_{T})$ for neutral pions
Author
Dr
Xin-Nian Wang
(IOPP / LBNL)
Co-authors
Prof.
Enke Wang
(IOPP)
Prof.
Hanzhong Zhang
(IOPP)
Prof.
Tetsufumi Hirano
(Tokyo University)
Dr
Xiao-fang Chen
(IOPP)