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Title: Long-Range Near-Side Angular Correlations in Proton-Proton Interactions in CMS

Abstract

The CMS Collaboration 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 7TeV over a broad range of pseudorapidity (η) and azimuthal angle (φ) are presented using data collected with the CMS detector at the LHC. Short-range correlations in ∆η, which are studied in minimum bias events, are characterized using a simple independent cluster parameterization in order to quantify their strength (cluster size) and their extent in η (cluster decay width). Long-range azimuthal correlations are studied more differentially as a function of charged particle multiplicity and particle transverse momentum using a 980nb−1 data set at 7TeV. In high multiplicity events, a pronounced structure emerges in the two-dimensional correlation function for particles in intermediate pT’s of 1-3GeV/c, 2.0< |∆η|<4.8 and ∆φ≈0. This is the first observation of such a ridge-like feature in two-particle correlation functions in pp or p$$\bar{p}$$ collisions.

Authors:
;
Publication Date:
OSTI Identifier:
1026003
Resource Type:
Multimedia
Country of Publication:
CERN
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; PROTON-PROTON; LHC; COLLISIONS; MINIMUM BIAS

Citation Formats

Tonelli, Guido, and Roland, Gunther. Long-Range Near-Side Angular Correlations in Proton-Proton Interactions in CMS. CERN: N. p., 2010. Web.
Tonelli, Guido, & Roland, Gunther. Long-Range Near-Side Angular Correlations in Proton-Proton Interactions in CMS. CERN.
Tonelli, Guido, and Roland, Gunther. Tue . "Long-Range Near-Side Angular Correlations in Proton-Proton Interactions in CMS". CERN. https://www.osti.gov/servlets/purl/1026003.
@article{osti_1026003,
title = {Long-Range Near-Side Angular Correlations in Proton-Proton Interactions in CMS},
author = {Tonelli, Guido and Roland, Gunther},
abstractNote = {The CMS Collaboration 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 7TeV over a broad range of pseudorapidity (η) and azimuthal angle (φ) are presented using data collected with the CMS detector at the LHC. Short-range correlations in ∆η, which are studied in minimum bias events, are characterized using a simple independent cluster parameterization in order to quantify their strength (cluster size) and their extent in η (cluster decay width). Long-range azimuthal correlations are studied more differentially as a function of charged particle multiplicity and particle transverse momentum using a 980nb−1 data set at 7TeV. In high multiplicity events, a pronounced structure emerges in the two-dimensional correlation function for particles in intermediate pT’s of 1-3GeV/c, 2.0< |∆η|<4.8 and ∆φ≈0. This is the first observation of such a ridge-like feature in two-particle correlation functions in pp or p$\bar{p}$ collisions.},
doi = {},
journal = {},
number = ,
volume = ,
place = {CERN},
year = {2010},
month = {9}
}

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