Long-range and short-range dihadron angular correlations in central PbPb collisions at √ s NN = 2.76 TeV
Name
Chatrchyan2011_Article_Long-rangeAndShort-rangeDihadr.pdf
Description
Published version
Size
558.98 KB
Format
Unknown
Checksum (MD5)
ae1afe989efd25a468d11234c48c9f2e
Author(s)
The CMS Collaboration
Alver, Burak Han
Bauer, Gerry P
Bendavid, Joshua L.
Busza, Wit
Cali, Ivan Amos
Chan, M.
Dutta, Valentina
Everaerts, Pieter Bruno Bart
Gomez-Ceballos, Guillelmo
Date Issued
2011
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Creative Commons Attribution NonCommercial License 2.0
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1007/JHEP07(2011)076
