Effects of Geometric configuration in relativistic isobaric collisions at √s_NN=200 GeV

2025/08/24 by Das, Akash, Nayak, Satya Ranjan, Singh, B. K.
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.2508.17227

Abstract

In this work, we present a study on the effects of nuclear deformation (β₂,β₃) and surface diffuseness (a) on the charged hadron multiplicity (N_ch) and elliptic flow (v₂), obtained in symmetric isobaric collisions of ⁹⁶₄₄Ru + ⁹⁶₄₄Ru and ⁹⁶₄₀Zr + ⁹⁶₄₀Zr. The two extreme configurations (tip-tip and body-body) were used to determine the correlation between the final state observables and initial geometry using the HYDJET++ model. The octupole deformation parameter (β₃) enhances N_ch in central tip-tip Zr+Zr collisions and suppresses it in peripheral ones. In mid-central to peripheral body-body Zr+Zr collisions, β₃ leads to a reduction in charged hadron production. Surface-diffuseness (a), along with quadrapole deformation (β₂), also shows a significant impact on multiplicity and elliptic flow. The octupole deformation enhances elliptic flow in Zr's body-body collisions. Results are compared with the STAR blind-analysis data where available.

Citations

• ArXiv

Related

• Probing nuclear structure using elliptic flow of strange and multi-strange hadrons in isobar collisions
• Measurements of strange and multi-strange hadrons elliptic flow in isobar collisions at RHIC by STAR
• Nuclear Physics Confronts Relativistic Collisions Of Isobars
• Imaging the structure of atomic nuclei in high-energy nuclear collisions from STAR experiment
• Energy dependence of heavy-ion initial condition in isobar collisions