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| Format: | Preprint |
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2024
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| Online Access: | https://arxiv.org/abs/2412.05178 |
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| _version_ | 1866908677919735808 |
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| author | Sumberia, Vikash Mallick, Dukhishyam Sambyal, Sanjeev Singh Malik, Nasir Mehdi |
| author_facet | Sumberia, Vikash Mallick, Dukhishyam Sambyal, Sanjeev Singh Malik, Nasir Mehdi |
| contents | Hadronic resonances, with lifetimes of a few fm/\textit{c}, are key tools for studying the hadronic phase in high-energy collisions. This work investigates resonance production in pp collisions at $\sqrt{s} = 13.6$ TeV and in Pb$-$Pb collisions at $\sqrt{s_{\rm{NN}}} = 5.36$ TeV using the EPOS4 model, which can switch the Ultra-relativistic Quantum Molecular Dynamics (UrQMD) ON and OFF, enabling the study of final-state hadronic interactions. We focus on hadronic resonances and the production of non-strange and strange hadrons, addressing effects like rescattering, regeneration, baryon-to-meson production, and strangeness enhancement, using transverse momentum ($p_\textrm{T}$) spectra and particle ratios. Rescattering and strangeness effects are important at low $p_\rm{T}$, while baryon-to-meson ratios dominate at intermediate $p_\rm{T}$. A strong mass-dependent radial flow is observed in the most central Pb$-$Pb collisions. The average $p_\rm{T}$, scaled with reduced hadron mass (mass divided by valence quarks), shows a deviation from linearity for short-lived resonances. By analyzing the yield ratios of short-lived resonances to stable hadrons in pp and Pb$-$Pb collisions, we estimate the time duration ($τ$) of the hadronic phase as a function of average charged multiplicity. The results show that $τ$ increases with multiplicity and system size, with a nonzero value in high-multiplicity pp collisions. Proton (p), strange ($\rmΛ$), and multi-strange ($\rmΞ$, $\rmΩ$) baryon production in central Pb$-$Pb collisions is influenced by strangeness enhancement and baryon-antibaryon annihilation. Comparing with LHC measurements offers insights into the dynamics of the hadronic phase. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_05178 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Unveiling hadronic resonance dynamics at LHC energies: insights from EPOS4 Sumberia, Vikash Mallick, Dukhishyam Sambyal, Sanjeev Singh Malik, Nasir Mehdi High Energy Physics - Phenomenology Hadronic resonances, with lifetimes of a few fm/\textit{c}, are key tools for studying the hadronic phase in high-energy collisions. This work investigates resonance production in pp collisions at $\sqrt{s} = 13.6$ TeV and in Pb$-$Pb collisions at $\sqrt{s_{\rm{NN}}} = 5.36$ TeV using the EPOS4 model, which can switch the Ultra-relativistic Quantum Molecular Dynamics (UrQMD) ON and OFF, enabling the study of final-state hadronic interactions. We focus on hadronic resonances and the production of non-strange and strange hadrons, addressing effects like rescattering, regeneration, baryon-to-meson production, and strangeness enhancement, using transverse momentum ($p_\textrm{T}$) spectra and particle ratios. Rescattering and strangeness effects are important at low $p_\rm{T}$, while baryon-to-meson ratios dominate at intermediate $p_\rm{T}$. A strong mass-dependent radial flow is observed in the most central Pb$-$Pb collisions. The average $p_\rm{T}$, scaled with reduced hadron mass (mass divided by valence quarks), shows a deviation from linearity for short-lived resonances. By analyzing the yield ratios of short-lived resonances to stable hadrons in pp and Pb$-$Pb collisions, we estimate the time duration ($τ$) of the hadronic phase as a function of average charged multiplicity. The results show that $τ$ increases with multiplicity and system size, with a nonzero value in high-multiplicity pp collisions. Proton (p), strange ($\rmΛ$), and multi-strange ($\rmΞ$, $\rmΩ$) baryon production in central Pb$-$Pb collisions is influenced by strangeness enhancement and baryon-antibaryon annihilation. Comparing with LHC measurements offers insights into the dynamics of the hadronic phase. |
| title | Unveiling hadronic resonance dynamics at LHC energies: insights from EPOS4 |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2412.05178 |