Scaling of nuclear modification factors for hadrons and light nuclei

TL;DR

This paper proposes and demonstrates scaling laws based on constituent quark and nucleon numbers for nuclear modification factors in heavy-ion collisions, providing insights into the coalescence mechanisms at different levels.

Contribution

It introduces NCQ- and NCN- scaling laws for $R_{cp}$, linking experimental data to coalescence mechanisms at quark and nucleon levels.

Findings

Scaling laws show good agreement with experimental data.

NCQ and NCN scaling serve as probes for coalescence mechanisms.

Nice scaling behavior observed in different collision systems.

Abstract

The number of constituent quarks (NCQ-) scaling of hadrons and the number of constituent nucleons (NCN-) scaling of light nuclei are proposed for nuclear modification factors ($R_{cp}$) of hadrons and light nuclei, respectively, according to the experimental investigations in relativistic heavy-ion collisions. Based on coalescence mechanism the scalings are performed for pions and protons in quark level, and light nuclei $d (\bar d)$ and $^3$He for nucleonic level, respectively, formed in Au + Au and Pb + Pb collisions and nice scaling behaviour emerges. NCQ or NCN scaling law of $R_{cp}$ can be respectively taken as a probe for quark or nucleon coalescence mechanism for the formation of hadron or light nuclei in relativistic heavy-ion collisions.