Speaker
Javier Orjuela Koop
(University of Colorado Boulder)
Description
Small collision systems have long been considered a mere testing ground to understand how the partonic structure of the nucleus affects the formation of QGP in larger A+A collisions. However, recent measurements challenge this picture, suggesting the existence of collective behavior in small systems at RHIC and LHC energies. It is not currently clear whether these observations can be understood in terms of the hydrodynamic evolution of a thermalized medium, or if they originate instead from initial state effects. A key test to elucidate the matter is to carefully control the initial geometry of the collision and correlate it with the final-state particle emission. This talk will present the latest set of PHENIX measurements of flow observables in systems with one, two, and three initial hotspots---(p,d,3He)+Au at 200 GeV, comprising azimuthal two-particle correlations and anisotropy coefficients v_n. We will present comparisons with a variety of available theory calculations, and we will discuss opportunities for the further study of small system collectivity within the context of the RHIC d+Au beam energy scan program.
| Collaboration | PHENIX |
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Author
Javier Orjuela Koop
(University of Colorado Boulder)
