Measurements of two-particle correlations in e+e? collisions at 91 GeV with ALEPH archived data
Journal
Nuclear Physics A
Journal Volume
982
Pages
483-486
Date Issued
2019
Author(s)
Lee, Yen Jie
Badea, Anthony
Baty, Austin
McGinn, Christopher
Innocenti, Gian Michele
Thaler, Jesse
Peters, Michael
Sheng, Tzu An
Maggi, Marcello
Abstract
The first measurements of two-particle angular correlations for charged particles emitted in e+e− collisions at a center-of-mass energy of 91 GeV are presented. The archived data are collected with the ALEPH detector at LEP. The correlation functions are measured over a broad range of pseudorapidity and azimuthal angle of the charged particles. Those results are compared to predictions from the PYTHIA event generator. In contrast to the results from high charged particle multiplicity nucleon-nucleon, nucleon-nucleus and nucleus-nucleus collisions, where long-range correlations with a large pseudorapidity gap are observed, no significant enhancement of long-range correlations is observed with respect to PYTHIA predictions, which do not include additional final state interactions of the outgoing partons. © 2018
Subjects
ALEPH; correlation function; electron-position annihilation; LEP; QCD
SDGs
Type
journal article