Update on J/ψ regeneration in a hadron gas
| Autor: | F. S. Navarra, K. P. Khemchandani, Luciano M. Abreu, Marina Nielsen, A. Martínez Torres |
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| Přispěvatelé: | Institut de Physique Théorique - UMR CNRS 3681 (IPHT), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Théorique - UMR CNRS 3681 ( IPHT ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay-Centre National de la Recherche Scientifique ( CNRS ) |
| Rok vydání: | 2018 |
| Předmět: |
Particle physics
charmed meson heavy ion: scattering Meson Nuclear Theory Hadron strange meson 01 natural sciences 7. Clean energy 0103 physical sciences multiplicity hadron: gas Multiplicity (chemistry) numerical calculations Nuclear Experiment 010306 general physics quark gluon: plasma Physics Large Hadron Collider 010308 nuclear & particles physics effective Lagrangian High Energy Physics::Phenomenology Absorption cross section charmonium: suppression Rate equation cross section: absorption regeneration [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] Quark–gluon plasma [ PHYS.HPHE ] Physics [physics]/High Energy Physics - Phenomenology [hep-ph] meson: heavy High Energy Physics::Experiment Relativistic Heavy Ion Collider charmonium: production meson: coupling constant |
| Zdroj: | Phys.Rev.C Phys.Rev.C, 2018, 97 (4), pp.044902. ⟨10.1103/PhysRevC.97.044902⟩ Repositório Institucional da UNIFESP Universidade Federal de São Paulo (UNIFESP) instacron:UNIFESP Physical Review Physical Review C Physical Review C, American Physical Society, 2018, 97 (4), pp.044902. ⟨10.1103/PhysRevC.97.044902⟩ Phys.Rev.C, 2018, 97 (4), pp.044902. 〈10.1103/PhysRevC.97.044902〉 |
| ISSN: | 2469-9993 2469-9985 |
| DOI: | 10.1103/physrevc.97.044902 |
| Popis: | In heavy-ion collisions, after the quark-gluon plasma there is a hadronic gas phase. Using effective Lagrangians, we study the interactions of charmed mesons which lead to J/ψ production and absorption in this gas. We update and extend previous calculations introducing strange meson interactions and also including the interactions mediated by the recently measured exotic charmonium resonances Z(3900) and Z(4025). These resonances open new reaction channels for the J/ψ, which could potentially lead to changes in its multiplicity. We compute the J/ψ production cross section in processes such as D(s)(*)+D¯(*)→J/ψ+(π,ρ,K,K*) and also the J/ψ absorption cross section in the corresponding inverse processes. Using the obtained cross sections as input to solve the appropriate rate equation, we conclude that the interactions in the hadron gas phase lead to a 20–24% reduction of the J/ψ abundance. Within the uncertainties of the calculation, this reduction is the same at the Relativistic Heavy Ion Collider and the large Hadron Collider. |
| Databáze: | OpenAIRE |
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