Minijet deformation and charge-independent angular correlations on momentum subspace $(η,φ)$ in Au-Au collisions at $\sqrt{s_{NN}}$ = 130 GeV

Details Minijet deformation and charge-independent angular correlations on momentum subspace $(η,φ)$ in Au-Au collisions at $\sqrt{s_{NN}}$ = 130 GeV Minijet deformation and charge-independent angular correlations on momentum subspace $(η,φ)$ in Au-Au collisions at $\sqrt{s_{NN}}$ = 130 GeV

2004-11-04

arxiv.org/abs/nucl-ex/0411003v2

Phys.Rev.C73:064907,2006

Physics

Nuclear Physics

Nuclear Experiment

8 pages, 4 figures

Scientific paper

10.1103/PhysRevC.73.064907

First measurements of charge-independent correlations on angular difference variables $\eta_1 - \eta_2$ (pseudorapidity) and $\phi_1 - \phi_2$ (azimuth) are presented for primary charged hadrons with transverse momentum $0.15 \leq p_t \leq 2$ GeV/$c$ and $|\eta| \leq 1.3$ from Au-Au collisions at $\sqrt{s_{NN}} = 130$ GeV. Strong charge-independent angular correlations are observed associated with jet-like structures and elliptic flow. The width of the jet-like peak on $\eta_1 - \eta_2$ increases by a factor 2.3 from peripheral to central collisions, suggesting strong coupling of semi-hard scattered partons to a longitudinally-expanding medium. New methods of jet analysis introduced here provide evidence for nonperturbative QCD medium effects in heavy ion collisions.

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