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Title: Gluon correlations from a glasma flux-tube model compared to measured hadron correlations on transverse momentum (p t,p t) and angular differences (η ΔΔ)

A glasma flux-tube model has been proposed to explain strong elongation on pseudorapidity η of the same-side two-dimensional (2D) peak in minimum-bias angular correlations from √( sNN)=200 GeV Au-Au collisions. The same-side peak or “soft ridge” is said to arise from coupling of flux tubes to radial flow whereby gluons radiated transversely from flux tubes are boosted by radial flow to form a narrow structure or ridge on azimuth. In this study we test the theory conjecture by comparing measurements to predictions for particle production, spectra, and correlations from the glasma model and from conventional fragmentation processes. We conclude that the glasma model is contradicted by measured hadron yields, spectra, and correlations, whereas a two-component model of hadron production, including minimum-bias parton fragmentation, provides a quantitative description of most features of the data, although η elongation of the same-side 2D peak remains undescribed.
Publication Date:
Publisher's Accepted Manuscript
Journal Name:
Physical Review. C, Nuclear physics
Additional Journal Information:
Journal Volume: 84; Journal Issue: 3; Related Information: CHORUS Timestamp: 2017-04-06 12:38:54; Journal ID: ISSN 0556-2813
American Physical Society
Sponsoring Org:
Country of Publication:
United States
OSTI Identifier: