Conveners
Parallel: Collectivity in small systems 2
- James Nagle (University of Colorado)
The second- and third-order azimuthal anisotropy Fourier harmonics are studied in pPb collisions at $\sqrt{s_{_\text{NN}}}=8.16~\mathrm{TeV}$ over a wide range of event multiplicities. Multiparticle correlations are used to isolate global properties stemming from the collision overlap geometry. The second-order, ``elliptic'' harmonic moment is obtained with high precision through four-, six-,...
In order to investigate the origin of collectivity in small systems, the PHENIX experiment has collected data of p+Au, d+Au and $^3$He+Au collisions at 200 GeV, giving a unique set of initial geometries. In this talk we present a complete set of elliptic and triangular flow measurements, which taken together provide unprecedented model discrimination between initial-state momentum correlation...
Measurements of ``small,'' p+A or d+A, systems at the LHC and RHIC have suggested possible collective flow and, for high event activity collisions, jet modification that may scale with Bjorken x. They also provide input to related questions of the initial state of the proton prior to and throughout its collision with the opposing heavy ion nucleus. This talk presents preliminary measurements...
Simulations of relativistic heavy-ion collisions based on viscous hydrodynamics provide an accurate description of the bulk observables measured at RHIC and LHC beam energies, including identified particle yields, mean $p_T$ and multiparticle correlations. The success of the hydrodynamic framework, however, is naturally expected to break down in the dilute limit where discrete particle degrees...
Initial state geometry has proved to be decisively important for quantitative descriptions of collective behavior in large collision systems, such as PbPb and AuAu. One of the most remarkable lessons from LHC has been the discovery of collective behavior in small collision systems, but here the notion of spatial structure is not as obvious as in nuclear collisions. In Monte Carlo event...
