Probing the structure of the initial state of heavy-ion collisions with pT -dependent flow fluctuations

The ExTrEMe Collaboration

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Abstract

The connection between initial-state geometry and anisotropic flow can be quantified through a well-established mapping between pT-integrated flow harmonics and cumulants of the initial transverse energy distribution. In this paper we successfully extend this mapping to also include pT-differential flow. In doing so, we find that subleading principal components of anisotropic flow can reveal previously unobserved details of the hydrodynamic response, in both the linear and the nonlinear regimes. Most importantly, we show that they provide novel information on the small-scale structures present in the initial stage of relativistic heavy-ion collisions.

Original languageEnglish (US)
Article number064909
JournalPhysical Review C
Volume102
Issue number6
DOIs
StatePublished - Dec 22 2020

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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