2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/204099Correlation studies exhibit a ridge-like feature in rapidity and azimuthal angle, with and without a jet trigger. We ask whether the feature in untriggered correlations can be a consequence of transverse flow and viscous diffusion.Proc. Quark Matter 2008, Jaipur, IndiaNuclear TheoryViscosity and the Soft Ridge at RHICtext