Orbital momentum effects due to a liquid nature of transient state

TL;DR

This paper proposes that the directed flow observable in nucleus and hadron collisions can indicate whether the transient matter is in a liquid state, based on its rotational effects.

Contribution

It introduces the idea that directed flow can serve as a signal for the liquid nature of transient matter in high-energy collisions.

Findings

Directed flow may originate from rotation of transient matter.

Presence of directed flow suggests a liquid state of transient matter.

Analogy between hadronic and nucleus collisions supports the hypothesis.

Abstract

It is argued that directed flow $v_1$, the observable introduced for description of nucleus collisions, can be used for the detection of the nature of state of the matter in the transient state of hadron and nuclei collisions. We consider a possible origin of the directed flow in hadronic reactions as a result of rotation of the transient matter and trace analogy with nucleus collisions. Our proposal it that the presence of directed flow can serve as a signal that transient matter is in a liquid state.