The Milne spacetime and the hadronic Rindler horizon

TL;DR

This paper establishes a connection between Milne and Rindler spacetimes, revealing that Milne's metric relates to the region beyond Rindler's horizon, and finds similarities in shear tensors from RHIC fireballs and black hole interiors.

Contribution

It demonstrates a direct relation between Milne and Rindler geometries and compares shear tensor structures in high-energy physics and black hole models.

Findings

Milne spacetime corresponds to the region beyond Rindler's horizon.

Shear tensor structure in RHIC fireball matches that of black hole interior.

Identifies geometric and physical parallels between expanding fireballs and black hole regions.

Abstract

A direct relation between the time dependent Milne geometry and the Rindler spacetime is shown. Milne's metric corresponds to that one beyond Rindler's event horizon (in the region $t \succ |x|)$). It was found that the shear tensor from the dissipative term of the RHIC expanding fireball has the same structure as that corresponding to the anisotropic fluid from the black hole interior, even though the latter geometry is curved.