https://doi.org/10.1051/epjconf/201713705002
A data-driven approach to η and η′ Dalitz decays
1 Grup de Física Teòrica, Departament de Física, Universitat Autònoma de Barcelona, E-08193 Bellaterra (Barcelona), Spain
2 Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology (BIST), Campus UAB, E-08193 Bellaterra (Barcelona), Spain
a e-mail: rescriba@ifae.es
Published online: 22 March 2017
Data-driven model-independent predictions for the dilepton invariant mass spectra and branching ratios of the single and double Dalitz decays η(′)→ℓ+ℓ−γ and η(′)→ℓ+ℓ−ℓ+ℓ− (ℓ = e or μ) are provided by means of an approach based on the use of rational approximants applied to the available experimental data in the space-like region of the η and η′ transition form factors.
© The Authors, published by EDP Sciences, 2017
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.
