Title
Observation of long-range, near-side angular correlations in proton-proton collisions at the LHC Observation of long-range, near-side angular correlations in proton-proton collisions at the LHC
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Bristol ,
Subject
Physics
Source (journal)
Journal of high energy physics. - Bristol
Volume/pages
(2010) :9 , p. 1-38
ISSN
1126-6708
1029-8479
ISI
000282371300025
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Results on two-particle angular correlations for charged particles emitted in proton-proton collisions at center-of-mass energies of 0.9, 2.36, and 7 TeV are presented, using data collected with the CMS detector over a broad range of pseudorapidity (η) and azimuthal angle (&#981;). Short-range correlations in Δη, which are studied in minimum bias events, are characterized using a simple independent cluster parametrization in order to quantify their strength (cluster size) and their extent in η (cluster decay width). Long-range azimuthal correlations are studied differentially as a function of charged particle multiplicity and particle transverse momentum using a 980 nb−1 data set at 7 TeV. In high multiplicity events, a pronounced structure emerges in the two-dimensional correlation function for particle pairs with intermediate p T of 13 GeV/c, 2.0 < |Δη| < 4.8 and Δ&#981; ≈ 0. This is the first observation of such a long-range, near-side feature in two-particle correlation functions in pp or $$ p\overline p $$ collisions.
E-info
https://repository.uantwerpen.be/docman/iruaauth/93981f/fc70b381c11.pdf
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