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

preprint2015arXivOpen access

Abstract

Recent observations of ridge-like structure in pp-pp and pp-AA 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 AA-AA 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 AA-AA collisions may not imply hydrodynamic flow. I present spectrum, correlation and fluctuation data from RHIC pp-pp and Au-Au collisions and pp-pp, pp-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 pp-pp nonjet (NJ) quadrupole (v2v_2) component with nchn_{ch} systematics directly related to AA-AA NJ quadrupole systematics. The combination suggests that soft, dijet and NJ quadrupole components are distinct phenomena in all cases, inconsistent with hadron production from a common bulk medium exhibiting collective motion (flow).

Explore this paper’s authors, topics and related work.

Building this map preview

BZPEER is loading the nearby papers, people, topics and institutions for this page.

Reviews 0

Write a reviewWrite

No reviews yet.

Discussion 0

Add a commentWrite

No comments yet.