Heavy flavor angular correlations as probes of the glasma

¹ Department of Physics, University of Jyväskylä, P.O. Box 35, 40014 University of Jyväskylä, Finland
² Helsinki Institute of Physics, P.O. Box 64, 00014 University of Helsinki, Finland
³ Department of Physics and Astronomy, University of Catania, Via S. Sofia 64, I-95123 Catania, Italy
⁴ INFN-Laboratori Nazionali del Sud, Via S. Sofia 62, I-95123 Catania, Italy
⁵ Institute for Theoretical Physics, TU Wien, Wiedner Hauptstraße 8, A-1040 Vienna, Austria

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Published online: 17 April 2026

Abstract

We study the effect of the glasma fields, formed in the early stage of heavy-ion collisions, on the transport of QQ̅ pairs produced back-to-back. We find that for pairs with moderate initial transverse momentum p_T evolving in glasma fields with sufficiently large saturation momentum Q_s, the azimuthal correlation C(Δφ) is quickly affected. The decorrelation widths σ_Δϕ during the glasma and Quark Gluon Plasma (QGP) phases are comparable.