Fractional Momentum Loss to Discriminate Between Quark and Gluon Energy Loss in the QGP

Quark Gluon Plasma (QGP), a state of matter that consists of deconfined quarks and gluons, is created in heavy ion collisions.  Studying the QGP is vital for a full understanding the strong interactions between subatomic particles. An important probe of the QGP is a jet which is a collimated spray of particles resulting from an energetic quark or gluon produced at the initial stage of the heavy-ion collision. Jets are modified by the QGP due to the interactions and energy loss experienced by their parent partons as they traverse the medium.  The fractional momentum loss (S_loss ≡ δp_T /p_T) can be measured to quantify the energy loss in the QGP by comparing spectra measured in heavy-ion collisions to spectra from p+p collisions. The PHENIX collaboration previously measured S_loss of high-transverse momentum hadrons measured in various collisions systems and energies. In this talk, we will present the fractional momentum loss for reconstructed jets in Pb+Pb collisions at 2.76 TeV in various rapidity ranges using data published by the ATLAS experiment at the Large Hadron Collider. Measuring S_loss for jets from different rapidity ranges may be sensitive to the differences in energy loss expected for quark and gluon jets which would further our understanding of energy loss in the QGP.