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Theoretical analysis of the doubly radiative decays η (') →π0γγ and η' →ηγγ
Escribano, Rafel (Institut de Física d'Altes Energies)
Gonzàlez-Solís, Sergi (Indiana University)
Jora, Renata (National Institute of Physics and Nuclear Engineering)
Royo, Emilio (Universitat Autònoma de Barcelona. Departament de Física)

Date: 2020
Abstract: The scalar and vector meson exchange contributions to the doubly radiative decays η(')→π0γγ and η'→ηγγ are analyzed within the linear sigma model and vector meson dominance frameworks, respectively. Predictions for the diphoton invariant mass spectra and the associated integrated branching ratios are given and compared with current available experimental data. While a satisfactory description of the shape of the η→π0γγ and η'→π0γγ decay spectra is obtained, thus supporting the validity of the approach, the corresponding branching ratios cannot be reproduced simultaneously. A first theoretical prediction for the recently measured η'→ηγγ by the BESIII Collaboration is also presented.
Grants: Agencia Estatal de Investigación SEV-2016-0588
European Commission 824093
Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1069
Agencia Estatal de Investigación FPA2017-86989-P
Rights: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Language: Anglès
Document: Article ; recerca ; Versió publicada
Published in: Physical Review D, Vol. 102 (August 2020) , art. 34026, ISSN 2470-0029

DOI: 10.1103/PhysRevD.102.034026


12 p, 497.4 KB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Institut de Física d’Altes Energies (IFAE)
Articles > Research articles
Articles > Published articles

 Record created 2025-10-09, last modified 2025-10-28



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