Collective effects in strong interaction processes: experimental highlights

TL;DR

This paper reviews experimental findings on collective effects across various high-energy collision systems, highlighting new insights into strong interactions, particle production, and implications for astrophysics and cosmology.

Contribution

It provides a comprehensive overview of recent experimental results on collective phenomena in strong interactions, including novel measurements and their interdisciplinary implications.

Findings

Observation of collectivity in small systems

Indirect estimation of hyperon-nucleon potential parameters

Potential explanation for the muon puzzle in cosmic rays

Abstract

Collective effects are reviewed for collisions of various systems - from proton-proton to heavy ion - in wide energy range. In proton-proton interactions studies of hadron jets devote to the better understanding of some basic features of strong interaction and search for the physics beyond of Standard Model. First results have been obtained for massive gauge bosons and antitop-top pair production in proton-nuclear and heavy ion collisions at multi-TeV energies. The collectivity has been observed for various particle and beam species, in particular, in collision of small systems. Experimental results obtained for discrete symmetries of strong interaction at finite temperature confirm indirectly the topologically non-trivial structure of the vacuum. The recent measurements of femtoscopic correlations provide, in particular, the indirect estimations for parameters of hyperon-nucleon potentials which are essential for study of inner structure of compact astrophysical objects. Novel mechanism for multiparticle production due to collectivity can be expected in very high energy nuclear collisions and it may be helpful for better understanding of the nature of the muon puzzle in ultra-high energy cosmic ray measurements. Thus studies of collective effects in strong interaction processes provide new important results for relativistic astrophysics, cosmology and cosmic ray physics, i.e. have interdisciplinary significance.