Thermo-coalescence model for Light Nuclei production in Relativistic Heavy-Ion Collisions
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912532409614336 |
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| author | Yadav, Arun Kumar Sarkar, Nachiketa Rode, Sudhir Pandurang Bhaduri, Partha Pratim Bhattacharyya, Abhijit Jaiswal, Amaresh |
| author_facet | Yadav, Arun Kumar Sarkar, Nachiketa Rode, Sudhir Pandurang Bhaduri, Partha Pratim Bhattacharyya, Abhijit Jaiswal, Amaresh |
| contents | We employ a hybrid approach to describe the light nuclei production mechanism where the nucleons are assumed to be thermally produced, and are allowed to form light nuclei using a coalescence prescription. In this approach, we first fit transverse momentum ($p_{T}$) distribution of nucleons using hydro-inspired boost-invariant blast-wave model. The extracted parameters are then used to describe the deuteron $p_{T}$ spectra, along with two additional parameters that characterize the coalescence prescription employed in this study. We refer this combined approach as ``thermo-coalescence model'' and it is designed to study the deuteron production and describe the experimental measurements. In this work, we analyze the measured $p_{T}$ distribution of protons and deuterons from Pb-Pb collisions at the ALICE Collaboration at LHC. We also evaluate the $p_{T}$-integrated deuteron yields using this approach and compare with experimental measurements. A Bayesian inference framework is employed to determine the best-fit parameters of the thermo-coalescence model. Finally, we estimate the traditionally used experimental coalescence parameter ($B_{A}$) within our framework in order to establish a connection between our model and the conventional coalescence approach commonly used to relate experimental data with theoretical descriptions of light nuclei production. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_07844 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Thermo-coalescence model for Light Nuclei production in Relativistic Heavy-Ion Collisions Yadav, Arun Kumar Sarkar, Nachiketa Rode, Sudhir Pandurang Bhaduri, Partha Pratim Bhattacharyya, Abhijit Jaiswal, Amaresh Nuclear Theory High Energy Physics - Phenomenology We employ a hybrid approach to describe the light nuclei production mechanism where the nucleons are assumed to be thermally produced, and are allowed to form light nuclei using a coalescence prescription. In this approach, we first fit transverse momentum ($p_{T}$) distribution of nucleons using hydro-inspired boost-invariant blast-wave model. The extracted parameters are then used to describe the deuteron $p_{T}$ spectra, along with two additional parameters that characterize the coalescence prescription employed in this study. We refer this combined approach as ``thermo-coalescence model'' and it is designed to study the deuteron production and describe the experimental measurements. In this work, we analyze the measured $p_{T}$ distribution of protons and deuterons from Pb-Pb collisions at the ALICE Collaboration at LHC. We also evaluate the $p_{T}$-integrated deuteron yields using this approach and compare with experimental measurements. A Bayesian inference framework is employed to determine the best-fit parameters of the thermo-coalescence model. Finally, we estimate the traditionally used experimental coalescence parameter ($B_{A}$) within our framework in order to establish a connection between our model and the conventional coalescence approach commonly used to relate experimental data with theoretical descriptions of light nuclei production. |
| title | Thermo-coalescence model for Light Nuclei production in Relativistic Heavy-Ion Collisions |
| topic | Nuclear Theory High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2508.07844 |