2016/06/30 by ATLAS Collaboration, M. Aaboud, G. Aad +98 · 1 citation
Mathematics · Physics and Astronomy · #Charged particle #Geometry #High-Energy Particle Collisions Research #Ion #Large Hadron Collider #Materials science #Mathematics #Multiplicity (mathematics) #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Proton #Pseudorapidity #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Range (aeronautics) #Rapidity #hep-ex #nucl-ex
paper · pdf · doi:10.1103/physrevc.95.064914
published as Phys. Rev. C 95, 064914 (2017) · 28 pages plus author list + cover pages (45 pages total), 14 figures, submitted to Phys. Rev. C. All figures including auxiliary figures can be found at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2015-13/. Matches published version
openalex created_date 2016/06/24 · openalex publication_date 2017/06/28 · arxiv created 2017/08/14 · arxiv updated 2017/08/15 · openalex updated_date 2026/08/06
Two-particle pseudorapidity correlations are measured in √sNN=2.76\phantom\rule0.16em0exTeV\phantom\rule0.28em0exPb+Pb, √sNN=5.02\phantom\rule4pt0exTeV\phantom\rule0.28em0exp+Pb, and √(s)=13\phantom\rule4pt0exTeV\phantom\rule4pt0expp collisions at the Large Hadron Collider (LHC), with total integrated luminosities of approximately 7\phantom\rule0.16em0ex\ensuremathμb^\ensuremath-1, 28 nb^\ensuremath-1, and 65 nb^\ensuremath-1, respectively. The correlation function CN(\ensuremathη1,\ensuremathη2) is measured as a function of event multiplicity using charged particles in the pseudorapidity range |\ensuremathη|<2.4. The correlation function contains a significant short-range component, which is estimated and subtracted. After removal of the short-range component, the shape of the correlation function is described approximately by 1+\ensuremath⟨a12\ensuremath⟩1/2\ensuremathη1\ensuremathη2 in all collision systems over the full multiplicity range. The values of \ensuremath⟨a12\ensuremath⟩1/2 are consistent for the opposite-charge pairs and same-charge pairs, and for the three collision systems at similar multiplicity. The values of \ensuremath⟨a12\ensuremath⟩1/2 and the magnitude of the short-range component both follow a power-law dependence on the event multiplicity. The short-range component in p + Pb collisions, after symmetrizing the proton and lead directions, is found to be smaller at a given \ensuremathη than in pp collisions with comparable multiplicity.