Measurement of the azimuthal ordering of charged hadrons with the ATLAS detector

Details Measurement of the azimuthal ordering of charged hadrons with the ATLAS detector Measurement of the azimuthal ordering of charged hadrons with the ATLAS detector

2012-03-02

arxiv.org/abs/1203.0419v1

Physics

High Energy Physics

High Energy Physics - Experiment

12 pages + author list (24 pages in total), 11 figures, 5 tables, submitted to Physical Review D

Scientific paper

This paper presents a measurement of the ordering of charged hadrons in the azimuthal angle relative to the beam axis in high-energy proton-proton collisions at the Large Hadron Collider (LHC). A spectral analysis of correlations between longitudinal and transverse components of the momentum of the charged hadrons, driven by the search for phenomena related to the structure of the QCD field, is performed. Data were recorded with the ATLAS detector at centre-of-mass energies of sqrt(s) = 900 GeV and sqrt(s) = 7 TeV. The correlations measured in a phase space region dominated by low-pT particles are not well described by conventional models of hadron production. The measured spectra show features consistent with the fragmentation of a QCD string represented by a helix-like ordered gluon chain.

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