Title
Long-range and short-range dihadron angular correlations in central PbPb collisions at <tex>$\sqrt{s_{NN}}$</tex> = 2.76 TeVLong-range and short-range dihadron angular correlations in central PbPb collisions at <tex>$\sqrt{s_{NN}}$</tex> = 2.76 TeV
Author
Faculty/Department
Faculty of Sciences. Physics
Research group
Elementary Particle Physics
Publication type
article
Publication
Bristol,
Subject
Physics
Source (journal)
Journal of high energy physics. - Bristol
Volume/pages
(2011):7, p. 1-32
ISSN
1126-6708
1029-8479
ISI
000293741500012
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
First measurements of dihadron correlationsfor charged particles are presented for central PbPb collisions at a nucleon-nucleon center-of-mass energy of 2.76TeV over a broad range in relative pseudorapidity (&#8710;η) and the full range of relative azimuthal angle (&#8710;&#981;). The data were collected with the CMS detector, at the LHC. A broadening of the away-side (&#8710;&#981; ≈ π) azimuthal correlation is observed at all &#8710;η, as compared to the measurements in pp collisions. Furthermore, long-range dihadron correlations in &#8710;η are observed for particles with similar &#981; values. This phenomenon, also known as the ridge, persists up to at least |&#8710;η| = 4. For particles with transverse momenta (p T) of2-4 GeV/c, the ridge is found to be most prominent when these particles are correlated with particles of p T = 2-6 GeV/c, and to be much reduced when paired with particles of p T = 10-12 GeV/c.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/3741ae/ae1afe98.pdf
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