Hadronic scattering effects on $ψ(2S)$ suppression in relativistic heavy-ion collisions
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| Format: | Preprint |
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2024
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| _version_ | 1866914952757903360 |
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| author | Abreu, L. M. Navarra, F. S. Vieira, H. P. L. |
| author_facet | Abreu, L. M. Navarra, F. S. Vieira, H. P. L. |
| contents | In this work we estimate the $N_{ψ(2S)} / N_{J/ψ}$ yield ratio in heavy-ion collisions, considering the interactions of the $ψ(2S) $ and $J/ψ$ states with light mesons in the hadron gas formed at the late stages of these collisions. Starting from the appropriate effective Lagrangians, we first compute the thermally-averaged cross sections for the production and absorption of the mentioned states, and then use them as input in the rate equations to determine the time evolution of $N_{ψ(2S)}$, $N_{J/ψ}$ and $N_{ψ(2S)} / N_{J/ψ}$. The main conclusion of our study is that the $ψ(2S) $ and $J/ψ$ multiplicities do not change much in the hadron gas phase and that the $ψ(2S)$ is more absorbed than the $J/ψ$. The obtained final ratio is in qualitative agreement with experimental data. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2409_12755 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Hadronic scattering effects on $ψ(2S)$ suppression in relativistic heavy-ion collisions Abreu, L. M. Navarra, F. S. Vieira, H. P. L. High Energy Physics - Phenomenology In this work we estimate the $N_{ψ(2S)} / N_{J/ψ}$ yield ratio in heavy-ion collisions, considering the interactions of the $ψ(2S) $ and $J/ψ$ states with light mesons in the hadron gas formed at the late stages of these collisions. Starting from the appropriate effective Lagrangians, we first compute the thermally-averaged cross sections for the production and absorption of the mentioned states, and then use them as input in the rate equations to determine the time evolution of $N_{ψ(2S)}$, $N_{J/ψ}$ and $N_{ψ(2S)} / N_{J/ψ}$. The main conclusion of our study is that the $ψ(2S) $ and $J/ψ$ multiplicities do not change much in the hadron gas phase and that the $ψ(2S)$ is more absorbed than the $J/ψ$. The obtained final ratio is in qualitative agreement with experimental data. |
| title | Hadronic scattering effects on $ψ(2S)$ suppression in relativistic heavy-ion collisions |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2409.12755 |