Measurement of inclusive two-particle angular correlations in pp collisions with the ATLAS detector at the LHC

Abstract

We present a measurement of two-particle angular correlations in proton-proton collisions at sqrt(s) = 900 GeV and 7 TeV. The collision events were collected during 2009 and 2010 with the ATLAS detector at the Large Hadron Collider using a single-arm minimum bias trigger. Correlations are measured for charged particles produced in the kinematic range of transverse momentum pT > 100 MeV and pseudorapidity |eta| < 2.5. A complex structure in pseudorapidity and azimuth is observed at both collision energies. Results are compared to Pythia 8 and Herwig++ as well as to the AMBT2B, DW and Perugia 2011 tunes of Pythia 6. The data are not satisfactorily described by any of these models.

24 pages plus author list (47 in total), 10 figures, 2 tables, revised author list, matches published version in JHEP

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Cited by in corpus (7)

• Hydrodynamic Approaches in Relativistic Heavy Ion Reactions
• Forward-backward correlations and charged-particle azimuthal distributions in pp interactions using the ATLAS detector
• Two-particle correlations in azimuthal angle and pseudorapidity in inelastic p+p interactions at the CERN Super Proton Synchrotron
• On a Five-Dimensional Chern-Simons AdS Supergravity without gravitino
• Angular correlations measured in pp collisions by ALICE at the LHC
• Two-particle angular correlations in pp collisions recorded with the ALICE detector at the LHC
• A Large-$N$ Expansion for Minimum Bias