2014/09/15 by A. Morreale, Morreale, Astrid
Physics and Astronomy · #FOS: Physical sciences #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.1409.4456
openalex publication_date 2014/09/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
One of the key signatures of the Quark Gluon Plasma (QGP) is the modification\nof hadron and direct photon spectra in heavy-ion collisions as compared to\nproton-proton (pp) collisions. Suppression of hadron production at high\ntransverse momenta in heavy-ion collisions can be explained by the energy loss\nof the partons produced in the hard scattering processes which traverse the hot\nand dense QCD matter. The dependence of the observed suppression on the\ntransverse momentum (pT) of the measured hadron towards higher pT is an\nimportant input for the theoretical understanding of jet quenching effects in\nthe QGP and the nature of energy loss. Another key observable which has helped\nestablish the energy loss picture, is high pT direct photon production for\nwhich no suppression is expected. For low pT photon production, it is expected\nthat thermal sources will lead to enhancement of direct photons. We report an\noverview of photon and neutral meson production measurements by the ALICE\nexperiment at the LHC in heavy-ion and pp collisions.\n