On the peripheral-tube description of the two-particle correlations in nuclear collisions

TL;DR

This paper investigates two-particle correlations in nuclear collisions using a peripheral tube model, attributing observed patterns to initial condition fluctuations and hydrodynamic responses, and reproduces experimental data through hydrodynamical simulations.

Contribution

It introduces a peripheral tube model that explains two-particle correlations by linking initial geometric fluctuations to hydrodynamic responses, with parameters derived from physical interpretations.

Findings

Hydrodynamical simulations reproduce experimental two-particle correlation data.

Model parameters align qualitatively with observed data.

Initial condition fluctuations are key to understanding correlation structures.

Abstract

In this work, we study the two-particle correlations regarding a peripheral tube model. From our perspective, the main characteristics of the observed two-particle correlations are attributed to the multiplicity fluctuations and the locally disturbed one-particle distribution associated with hydrodynamic response to the geometric fluctuations in the initial conditions. We investigate the properties of the initial conditions and collective flow concerning the proposed model. It is shown that the experimental data can be reproduced by hydrodynamical simulations using appropriately constructed initial conditions. Besides, instead of numerical calibration, we extract the model parameters according to their respective physical interpretations and show that the obtained numerical values are indeed qualitatively in agreement with the observed data. Possible implications of the present approach are discussed.