p-p minimum-bias dijets and nonjet quadrupole in relation to conjectured collectivity (flows) in high-energy nuclear collisions

p-p minimum-bias dijets and nonjet quadrupole in relation to conjectured collectivity (flows) in high-energy nuclear collisions

Blog Article

Recent observations of ridge-like structure in p-p and p-A angular correlations at the RHIC and LHC have been interpreted to imply collective motion in smaller collision systems.It is argued that if correlation structures accepted as manifestations of flow in A-A collisions appear in smaller systems collectivity (flow) must extend to the smaller systems.But the argument could be reversed to conclude that such structures appearing in A-A collisions may not imply hydrodynamic flow.I present Seeds spectrum, correlation and fluctuation data from RHIC p-p and Au-Au Cartridges collisions and p-p, p-Pb and Pb-Pb results from the LHC described accurately by a two-component (soft+dijet) model of hadron production.I also present evidence for a significant p-p nonjet (NJ) quadrupole (v2) component with nch systematics directly related to A-A NJ quadrupole systematics.

The combination suggests that soft, dijet and NJ quadrupole com- ponents are distinct phenomena in all cases, inconsistent with hadron production from a common bulk medium exhibiting collective motion (flow).