Asymmetric 1+1-dimensional hydrodynamics in collision

TL;DR

This paper explores how asymmetric 1+1-dimensional hydrodynamic flows can explain particle production in high-energy collisions, offering a new perspective on asymmetric flow dynamics and their relation to experimental data.

Contribution

It introduces a generalized in-out cascade model of asymmetric hydrodynamics and demonstrates its compatibility with symmetric particle production data.

Findings

Two-bump entropy density structure can evolve into a single maximum

Model aligns with experimental data on symmetric processes

Proposes a microscopic QCD interpretation of asymmetric hydrodynamics

Abstract

The possibility that particle production in high-energy collisions is a result of two asymmetric hydrodynamic flows is investigated, using the Khalatnikov form of the 1+1-dimensional approximation of hydrodynamic equations. The general solution is discussed and applied to the physically appealing "generalized in-out cascade" where the space-time and energy-momentum rapidities are equal at initial temperature but boost-invariance is not imposed. It is demonstrated that the two-bump structure of the entropy density, characteristic of the asymmetric input, changes easily into a single broad maximum compatible with data on particle production in symmetric processes. A possible microscopic QCD interpretation of asymmetric hydrodynamics is proposed.