Experimental evidence of quantum quenching of fluctuations in heavy ion collisions

TL;DR

This paper presents experimental evidence that quantum effects significantly influence fluctuations in heavy ion collisions, affecting temperature and multiplicity distributions, and highlighting the necessity of quantum approaches in nuclear fragmentation analysis.

Contribution

It introduces a novel quantum method for analyzing nuclear temperature and density, demonstrating quantum quenching effects in heavy ion collision fluctuations.

Findings

Quantum method yields lower temperature estimates than classical methods.

Pauli blocking causes quenching of multiplicity distributions.

Quantum effects are essential for accurate statistical descriptions of fragmenting heavy ions.

Abstract

The first experimental results of a new quantum method for calculating nuclear temperature and density of fragmenting heavy ions is presented. This method is based on fluctuations in the event quadrupole momentum and fragment multiplicity distributions of light Fermions. The cal- culated temperatures are lower than those obtained with a similar classical method. Quenching of the normalized multiplicity distributions of light fermions due to Pauli blocking is also observed. These results indicate a need for a quantum treatment when dealing with statistical properties of fragmenting heavy-ions.