Application of Bayesian statistics to the sector of decay constants in three-flavour ChPT
| Autor: | Kolesár, Marián, Říha, Jaroslav |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Eur.Phys.J.Plus 139 (2024) 1, 31 |
| Druh dokumentu: | Working Paper |
| Popis: | The sector of decay constants of the octet of light pseudoscalar mesons in the framework of 'resummed' $SU(3)$ chiral perturbation theory is investigated. A theoretical prediction for the decay constant of $\eta$-meson is compared to a range of available determinations. Compatibility of these determinations with the latest fits of the $SU(3)$ low energy coupling constants is discussed. Using a Bayesian statistical approach, constraints on the low energy coupling constants $L_4^r$ and $L_5^r$, as well as higher order remainders to the decay constants $F_K$ and $F_\eta$, are extracted from the most recent experimental and lattice QCD inputs for the values of the decay constants. Comment: 13 pages, 11 figures, published version, significantly updated |
| Databáze: | arXiv |
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