2015/12/31 by Magdalena Djordjevic
Physics and Astronomy · #Astronomy #Flattening #Hadron #High-Energy Particle Collisions Research #Large Hadron Collider #Meson #Momentum (technical analysis) #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Parton #Physics #Plasma #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #Quark–gluon plasma #Radiative transfer #nucl-ex #nucl-th
paper · pdf · doi:10.1016/j.physletb.2016.10.077
4 pages, 2 figures
openalex created_date 2016/06/24 · openalex publication_date 2016/11/03 · arxiv created 2017/11/07 · arxiv updated 2017/11/08 · openalex updated_date 2026/08/06
Interactions of high momentum partons with Quark–Gluon Plasma created in relativistic heavy-ion collisions provide an excellent tomography tool for this new form of matter. Recent measurements for charged hadrons and unidentified jets at the LHC show an unexpected flattening of the suppression curves at high momentum, exhibited when either momentum or the collision centrality is changed. Furthermore, a limited data available for B probes indicate a qualitatively different pattern, as nearly the same flattening is exhibited for the curves corresponding to two opposite momentum ranges. We here show that the experimentally measured suppression curves are well reproduced by our theoretical predictions, and that the complex suppression patterns are due to an interplay of collisional, radiative energy loss and the dead-cone effect. Furthermore, for B mesons, we predict that the uniform flattening of the suppression indicated by the limited dataset is in fact valid across the entire span of the momentum ranges, which will be tested by the upcoming experiments. Overall, the study presented here, provides a rare opportunity for pQCD theory to qualitatively distinguish between the major energy loss mechanisms at the same (nonintuitive) dataset.