Song, Taesoo and Aichelin, Joerg (2025) In-medium effects in ϕ-meson production in heavy ion collisions from subthreshold to relativistic energies. Il nuovo cimento C, 48 (1). pp. 1-8. ISSN 1826-9885
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Abstract
We investigate the hidden strange φ meson production in heavy-ion collisions from subthreshold (Ekin ∼ 1AGeV) to relativistic (Ekin ∼ 21ATeV) energies as well as its coupling to the open strange mesons (kaons, antikaons) and their productions. Our study is based on the off-shell microscopic Parton-Hadron-String Dynamics (PHSD) transport approach. Implementing novel meson-baryon and meson-hyperon production channels for φ mesons, calculated within a T-matrix coupled channel approach based on the extended SU(6) chiral effective Lagrangian model, along with the collisional broadening of the φ-meson in-medium spectral function, we find a substantial enhancement of φ meson production in heavy-ion collisions, especially at sub- and near-thresholds. This allows to describe the experimentally observed strong enhancement of the φ/K− ratio at low energies without including hypothetical decays of heavy baryonic resonances to φ as in alternative approaches.
| Item Type: | Article |
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| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 24 Mar 2025 15:21 |
| Last Modified: | 24 Mar 2025 15:21 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/23502 |
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