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Long-range and short-range dihadron angular correlations in central PbPb collisions at √ s NN = 2.76 TeV
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Chatrchyan2011_Article_Long-rangeAndShort-rangeDihadr.pdf
Description
Published version
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558.98 KB
Format
Adobe PDF
Checksum (MD5)
ae1afe989efd25a468d11234c48c9f2e
Journal
Journal of High Energy Physics
Publisher
Springer Science and Business Media LLC
Citation
Chatrchyan, S., et al. "Long-Range and Short-Range Dihadron Angular Correlations in Central Pbpb Collisions at Root S(Nn)=2.76 Tev." Journal of High Energy Physics 7 (2011).
Version
Final published version
Abstract
First measurements of dihadron correlations for 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 (Δν) and the full range of relative azimuthal angle (Δø). The data were collected with the CMS detector, at the LHC. A broadening of the away-side (Δø y≈ π) azimuthal correlation is observed at all Δν, as compared to the measurements in pp collisions. Furthermore, long-range dihadron correlations in Δν are observed for particles with similar ø values. This phenomenon, also known as the \ridge", persists up to at least jΔνj = 4. For particles with transverse momenta (pT) of 2-4 GeV/c, the ridge is found to be most prominent when these particles are correlated with particles of pT = 2-6 GeV/c, and to be much reduced when paired with particles of pT = 10-12 GeV/c. Copyright CERN.
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Creative Commons Attribution NonCommercial License 2.0
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DOI of Published Version
10.1007/JHEP07(2011)076
