2018/04/24 by Jan Steinheimer, Yongjia Wang, A. Mukherjee +5 · 9 citations
Mathematics · Physics and Astronomy · #Baryon #Baryon number #Cumulant #Hadron #Heavy ion #High-Energy Particle Collisions Research #Ion #Mass number #Mathematics #Neutron #Nuclear physics #Nucleon #Particle physics #Physics #Proton #Pulsars and Gravitational Waves Research #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Rapidity #Statistics #hep-ph #nucl-th
paper · pdf · doi:10.1016/j.physletb.2018.07.068
published in Physics Letters B 785, 40-45 (Elsevier BV) · 6 pages 6 figures
arxiv created 2018/04/24 · openalex publication_date 2018/08/22 · arxiv updated 2018/09/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The effect of nuclear interactions on measurable net-proton number fluctuations in heavy ion collisions at the SIS18/GSI accelerator is investigated. The state of the art UrQMD model including interaction potentials is employed. It is found that the nuclear forces enhance the baryon number cumulants, as predicted from grand canonical thermodynamical models. The effect however is smeared out for proton number fluctuations due to iso-spin randomization and global baryon number conservation, which decreases the cumulant ratios. For a rapidity acceptance window larger than Δy>0.4 the effects of global baryon number conservation dominate and all cumulant ratios are significantly smaller than 1.