Jet fragmentation function moments in heavy ion collisions

Modified Fragmentation Function in Heavy Ion Collisions at RHIC via Direct γ-Jet Measurements

The presented results are the first measurements at RHIC for direct γ-charged hadron azimuthal correlations in heavy ion collisions. We use these correlations to study the color charge density of the medium through the medium-induced modification of high-pT parton fragmentation. Azimuthal correlations of direct photons at high transverse energy (8 < pT < 16 GeV) with away-side charged hadrons o...

Measurements of jet structure and fragmentation from full jet reconstruction in heavy ion collisions at RHIC

Measurements of inclusive hadron suppression and di-hadron azimuthal correlations have provided important insights into jet quenching in hot QCD matter. However, they do not provide access to the energy of the hard scattering and are limited in their sensitivity since they can be affected by biases toward hard fragmentation and small energy loss. Full jet reconstruction in heavy-ion collisions ...

Jet Tomography in Heavy Ion Collisions

Experiments at the Relativistic Heavy Ion Collider RHIC in Brookhaven show for the first time a significant quenching of high-p⊥ leading hadron spectra. In particular, transverse momentum spectra for neutral pion 1,2 and charged hadron 1,3 are suppressed if compared to spectra in p+p collisions rescaled by the number of binary collisions. This suppression is most pronounced (up to a factor ∼ 5)...

Jet reshaping in heavy-ion collisions

We propose a new implementation of medium effects in jet structures in which a modification of the splitting function is included at every step in the typical final state parton shower. Although the main application of this new formalism will be at the LHC, it is interesting that, in the presence of a trigger bias to small number of splittings, non-trivial angular dependences could appear with ...

Jet Quenching in Heavy Ion Collisions