Di-hadron correlations with identified leading hadrons in 200 GeV Au + Au and d plus Au collisions at STAR

Adamczyk, L. and Adkins, J. K. and Agakishiev, G. and Aggarwal, M. M. and Ahammed, Z. and Vértesi, Róbert (2015) Di-hadron correlations with identified leading hadrons in 200 GeV Au + Au and d plus Au collisions at STAR. PHYSICS LETTERS B, 751. pp. 233-240. ISSN 0370-2693

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Abstract

The STAR collaboration presents for the first time two-dimensional di-hadron correlations with identified leading hadrons in 200 GeV central Au+Au and minimum-bias d+Au collisions to explore hadronization mechanisms in the quark gluon plasma. The enhancement of the jet-like yield for leading pions in Au+Au data with respect to the d+Au reference and the absence of such an enhancement for leading non-pions (protons and kaons) are discussed within the context of a quark recombination scenario. The correlated yield at large angles, specifically in the ridge region, is found to be significantly higher for leading non-pions than pions. The consistencies of the constituent quark scaling, azimuthal harmonic model and a mini-jet modification model description of the data are tested, providing further constraints on hadronization.

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