Eccentricity and elliptic flow in proton-proton collisions from parton evolution |
| |
Authors: | Emil AvsarChristoffer Flensburg Yoshitaka Hatta Jean-Yves OllitraultTakahiro Ueda |
| |
Institution: | a 104 Davey Lab, Penn State University, University Park, 16802 PA, USA b Dept. of Theoretical Physics, Sölvegatan 14 A, S223 62 Lund, Sweden c Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan d CNRS, URA2306, IPhT, Institut de physique théorique, CEA Saclay, F-91191 Gif-sur-Yvette, France |
| |
Abstract: | It has been argued that high-multiplicity proton-proton collisions at the LHC may exhibit collective phenomena usually studied in the context of heavy-ion collisions, such as elliptic flow. We study this issue using DIPSY—a Monte Carlo event generator based on the QCD dipole model. We calculate the eccentricity of the transverse area defined by the spatial distribution of produced gluons. The resulting elliptic flow is estimated to be about 6%, comparable to the value in nucleus-nucleus collisions at RHIC and the LHC. Experimentally, elliptic flow is inferred from the azimuthal correlation between hadrons, which receives contributions from collective flow, and from various other effects referred to as “nonflow”. We discuss how to identify in experiments the signal of flow in the presence of large nonflow effects. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|