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- Title
Examining the influence of hadronic interactions on the directed flow of identified particles in RHIC Beam Energy Scan energies using UrQMD model.
- Authors
Sahoo, Aswini Kumar; Dixit, Prabhupada; Nasim, Md; Singha, Subhash
- Abstract
The directed flow of identified particles can serve as a sensitive tool for investigating the interactions during initial and final states in heavy ion collisions. This study examines the rapidity distribution (d N ∕ d y), rapidity-odd directed flow ( v 1 ) and its slope (d v 1 ∕ d y) for π ± , K ± , p, and p ̄ in Au+Au collisions at different collision centralities and beam energies ( s NN = 7. 7 , 11.5, 14.5, 19.6, 27, and 39 GeV) using the UrQMD model. We investigate the impact of late-stage hadronic interactions on charge-dependent v 1 (y) and its slope by modifying the duration of the hadronic cascade lifetime (τ). The energy dependence of d v 1 ∕ d y for p ( p ̄) exhibits distinct pattern compared to π ± and K ± . Notably, we observe a change in the sign reversal position of proton d v 1 ∕ d y at different beam energies with varying τ in central and mid-central collisions. Moreover, the difference in d v 1 ∕ d y between positively and negatively charged hadrons (Δ d v 1 ∕ d y) demonstrates a stark centrality dependence for different particle species. The deuteron displays a significant increase in d v 1 ∕ d y with increasing τ compared to p and n. This investigation underscores the importance of considering the temporal evolution and duration of the hadronic phase when interpreting the sign reversal, charge splitting of v 1 and light nuclei formation at lower RHIC energies.
- Subjects
PARTICLE beams; GRANULAR flow; HEAVY ion collisions; HEAVY-ion atom collisions; ENERGY consumption; PROTON-proton interactions; HADRONS
- Publication
Modern Physics Letters A, 2024, Vol 39, Issue 7, p1
- ISSN
0217-7323
- Publication type
Article
- DOI
10.1142/S0217732324500159