Influence of initial fluctuations on geometry measures in relativistic U-U and Cu-Au collisions

TL;DR

This paper examines how initial fluctuations affect geometry measures in relativistic U-U and Cu-Au collisions using Glauber models, highlighting sensitivities in azimuthal eccentricity and axis correlations.

Contribution

It compares different Glauber model variants to assess their impact on initial geometry measures in relativistic ion collisions.

Findings

Certain observables are sensitive to initial fluctuations.

Azimuthal eccentricity parameters are notably affected.

Correlations of principal axes directions vary with model choice.

Abstract

In the framework of the Glauber approach we investigate the influence of the initial fluctuations on various measures of the initial-state geometry in 63Cu+197Au and 238U+238U relativistic ion collisions. Comparing variants of Glauber model (the wounded-nucleon model, the mixed model, and the hot-spot model) we indicate sensitivity of certain observables, in particular for the azimuthal eccentricity parameters as well as for the correlation of directions of the principal axes associated with the Fourier components. We apply GLISSANDO in our analysis.