| Issue |
EPJ Web Conf.
Volume 333, 2025
XLVI Symposium on Nuclear Physics 2025
|
|
|---|---|---|
| Article Number | 02003 | |
| Number of page(s) | 7 | |
| Section | Fundamental Symmetries and Hadronic Physics | |
| DOI | https://doi.org/10.1051/epjconf/202533302003 | |
| Published online | 01 August 2025 | |
https://doi.org/10.1051/epjconf/202533302003
Updating the predictions for X(3872) and ψ(2S) production in heavy ion collisions to be measured by ALICE
1 Instituto de Física, Universidade Federal da Bahia, Campus de Ondina, 40170-115, Bahia, Brazil
2 Instituto de Física, Universidade de São Paulo, Rua do Matão, 1371, CEP 05508-090, São Paulo, Brazil
* e-mail: luciano.abreu@ufba.br
** e-mail: navarra@if.usp.br
*** e-mail: hildeson.paulo@ufba.br
Published online: 1 August 2025
We update previous predictions for the yield ratio R = NX(3872)=N ψ(2S) of particles produced at the LHC. We focus on the effects of the hadron gas phase on the abundance of these particles. We use a transport model to compute the multiplicities and how they evolve in time within the hadron gas. We find that the hadronic interactions yield a very weak suppression. Consequently, the ratio R for the tetraquark and meson molecule yields remains the same as the one at the hadronization time. In the present work we have improved the theoretical description of the ψ(2S) interactions and used it to recalculate the ratio R in PbPb collisions at √SNN = 5:02 TeV to be measured by the ALICE Collaboration in the Run 3. We find that the ratio obtained for the tetraquark configuration is 50 times smaller than for the molecular configuration. Within the uncertainties, this result is still consistent with our previous work.
© The Authors, published by EDP Sciences, 2025
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.