Predictions for Identified Hadron (π^±, K^± and p(p)) Production and Collective Dynamics in Oxygen-Oxygen Collisions at √s_NN= 7 TeV with EPOS4, AMPT-SM, and Angantyr in Pythia 8

2025/05/12 by Rabia Bashir, Bashir, Rabia, R. Shehzadi +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle Detector Development and Performance #Particle physics theoretical and experimental studies

paper · pdf · doi:10.48550/arxiv.2505.07435

openalex publication_date 2025/05/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31

Abstract

We study the dynamics of identified hadrons (π^±, K^± and p(p)) production in O+O collisions at √s_NN = 7TeV using recently updated version of EPOS4, string melting version of A Multi-Phase Transport Model (AMPT-SM) and Angantyr model, incorporated within Pythia 8. We examine the interplay between different mechanisms implemented in these models. Predictions for charged particle multiplicity (dN_ch/dη), transverse momentum (p_T) spectra of identified hadrons, particle yield (dN/dy) and mean transverse mass (⟨ m_T ⟩) are presented. To probe the collective behavior of the produced particles, the p_T-differential kaons-to-pion and proton-to-pion ratios are studied. While AMPT incorporates some flow effects, EPOS4's implementation of full hydrodynamic flow proves significantly more effective. In contrast, the flow effects in Pythia 8 are substantially weaker compared to the other models. The upcoming O+O data from the LHC will help constrain the parameters of these models.

Citations

• Perturbative QCD concerning light and heavy flavor in the EPOS4 framework
• Revealing a deep connection between factorization and saturation: New insight into modeling high-energy proton-proton and nucleus-nucleus scattering in the EPOS4 framework
• Opportunities of OO and pO collisions at the LHC
• Influence of modified light-flavor hadron spectra on particle yields in the statistical hadronization model
• Producing Hard Processes Regarding the Complete Event: The EPOS Event Generator
• Highly relativistic nucleus-nucleus collisions: The central rapidity region

Related

• Multiplicity dependence of (multi)strange hadrons in oxygen-oxygen collisions at √s_NN~=~7 TeV using EPOS4 and AMPT
• Strangeness production in O+O collisions at √s_NN=7 TeV using various model approaches
• Testing of Pythia modes to study identified particle production in high-multiplicity pp collisions at √(s) = 7 TeV
• Anisotropic flow coefficients for charged hadrons in O+O collisions at √s_NN=7 TeV using AMPT
• Anisotropic flow predictions for identified and strange hadrons in O+O collisions at √s_NN = 7 TeV using model approaches