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

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

2012-03-15

arxiv.org/abs/1203.3549v1

Physics

High Energy Physics

High Energy Physics - Experiment

24 pages plus author list (47 in total), 10 figures, 2 tables, submitted to JHEP

Scientific paper

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.

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