Calibrating the medium effects of light clusters in heavy-ion collisions
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866916591362375680 |
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| author | Custódio, Tiago Rebillard-Soulié, Alex Bougault, Rémi Gruyer, Diego Gulminelli, Francesca Malik, Tuhin Pais, Helena Providência, Constança |
| author_facet | Custódio, Tiago Rebillard-Soulié, Alex Bougault, Rémi Gruyer, Diego Gulminelli, Francesca Malik, Tuhin Pais, Helena Providência, Constança |
| contents | We propose a Bayesian inference estimation of in-medium modification of the cluster self-energies from light nuclei multiplicities measured in selected samples of central $^{136,124}$Xe$+^{124,112}$Sn collisions with the INDRA apparatus. The data are interpreted with a relativistic quasi-particle cluster approach in the mean-field approximation without any prior assumption on the thermal parameters of the model. An excellent reproduction is obtained for H and He isotope multiplicities, and compatible posterior distributions are found for the unknown thermal parameters.
We conclude that the cluster-$σ$-meson coupling is temperature dependent, becoming weaker when the temperature increases, in agreement with microscopic quantum statistical calculations. This implies a faster decrease of the light cluster abundances with temperature than previously estimated. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_02307 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Calibrating the medium effects of light clusters in heavy-ion collisions Custódio, Tiago Rebillard-Soulié, Alex Bougault, Rémi Gruyer, Diego Gulminelli, Francesca Malik, Tuhin Pais, Helena Providência, Constança Nuclear Theory We propose a Bayesian inference estimation of in-medium modification of the cluster self-energies from light nuclei multiplicities measured in selected samples of central $^{136,124}$Xe$+^{124,112}$Sn collisions with the INDRA apparatus. The data are interpreted with a relativistic quasi-particle cluster approach in the mean-field approximation without any prior assumption on the thermal parameters of the model. An excellent reproduction is obtained for H and He isotope multiplicities, and compatible posterior distributions are found for the unknown thermal parameters. We conclude that the cluster-$σ$-meson coupling is temperature dependent, becoming weaker when the temperature increases, in agreement with microscopic quantum statistical calculations. This implies a faster decrease of the light cluster abundances with temperature than previously estimated. |
| title | Calibrating the medium effects of light clusters in heavy-ion collisions |
| topic | Nuclear Theory |
| url | https://arxiv.org/abs/2407.02307 |