Speaker
Mr.
Gustavo Conesa Balbastre
(LPSC-CNRS)
Description
Hard-scattered partons are produced early in heavy-ion collisions, prior to the formation of the strongly interacting nuclear medium, the quark-qluon plasma (QGP). These partons lose energy as they traverse the medium and eventually fragment into jets, which exhibit a modification when compared to jets produced in pp collisions. Large transverse momentum (pT) particles, which are proxies for jets, and inclusive jets are suppressed in heavy-ion collisions at both RHIC and the LHC. Di-hadron correlation measurements have shown that the parton fragmentation is modified by the medium. At LHC energies the parton production cross-section is much larger than at RHIC, allowing jets to be reconstructed over a much wider kinematic range. Such measurements provide the possibility for a differential investigation of the parton energy loss.
The ALICE experiment at LHC, with its powerful tracking and particle identification capabilities and calorimetric systems, performs measurements of high-pT particles, jets (composed of charged or charged plus neutral particles) as well as their correlations. The calorimeters are used as trigger detectors and extend the measurable pT range for such probes.
In this talk, a summary of the recent results of the ALICE experiment on the measurement of high-pT particles, jets and high-pT di-hadron/hadron-jet correlations in pp, p-Pb and Pb-Pb collisions at the LHC between years 2010 and 2013 will be shown. Pb-Pb and p-Pb measurements will be compared to the pp baseline measurements to determine the effect of the QGP (Pb-Pb) or the initial cold nuclear matter (p-Pb).
Primary author
Mr.
Gustavo Conesa Balbastre
(LPSC-CNRS)