Abstract
Jet quenching is observed at both RHIC and LHC energies. This suggests that partons lose energy as they traverse the medium. When the trigger jet is studied relative to the event plane, the path length dependence of medium modifications can be studied. We present measurements of the angular correlations relative to the event plane between reconstructed jets and charged hadrons in Pb–Pb collisions at = 2.76 TeV in ALICE. A newly implemented, robust background subtraction method to remove the complex, flow dominated, combinatorial background is used in this analysis.
Highlights
Jets are formed from hard-scattered partons created early in the collision, prior to the formation of the Quark Gluon Plasma (QGP), making them ideal probes to study the properties of the QGP
The results show no significant path-length dependence on the medium modifications
Jets are formed from hard-scattered partons created early in the collision, prior to the formation of the QGP, making them ideal probes to study the properties of the QGP
Summary
Jets are formed from hard-scattered partons created early in the collision, prior to the formation of the QGP, making them ideal probes to study the properties of the QGP. The hard-scattered partons are modified in the presence of a medium through additional scatterings (collisional energy loss) or mediuminduced gluon radiation (radiative energy loss), both of which depend on the path-length traversed through the medium. These partonic modifications are observed at both RHIC and LHC energies via the suppression of high-momentum particles [1, 2, 3, 4, 5, 6, 7] and by the suppression of high-momentum di-hadron correlations [8, 9, 10, 11]. The goal is to answer the question: can we experimentally distinguish between the effects of path-length dependence and the enhancement of vacuum-like fluctuations [12]?
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