Modifications of high-pT di-hadron correlations for identified triggers

9th International Workshop on High-pT Physics at LHC

Evdokimov, Olga^1

University of Illinois at Chicago, 845 W. Taylor St., Chicago

IL

60607, United States^1

关键词: Angular correlations;    Comparative analysis;    Hadron correlations;    Hydrodynamic expansion;    Long range correlations;    Relative azimuth;    Transverse momenta;    Ultrarelativistic heavy ion collision;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/589/1/012006/pdf
DOI  :  10.1088/1742-6596/589/1/012006

来源: IOP

【 摘 要 】

Angular correlations with high transverse momentum hadrons have become an established tool for studying properties of the medium created in ultra-relativistic heavy ion collisions. When investigated in two dimensions, relative azimuth and relative pseudorapidity, the small-angle part of such correlations is commonly attributed to QCD jets, while long-range correlations, specifically ridge observed at low- and intermediate momentum, are often described as manifestations of hydrodynamic expansion of the system, e.g. flow. Comparative analysis of both features, presented in this work for correlations with identified leading hadrons, explores the particle type dependence of the jet structures, and challenges the flow-only hypotheses behind the ridge.