Speaker
Jaroslav Říha
(Institute of Particle and Nuclear Physics, Faculty of Mathematics and Physics, Charles University, Prague)
Description
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.
Primary authors
Jaroslav Říha
(Institute of Particle and Nuclear Physics, Faculty of Mathematics and Physics, Charles University, Prague)
Dr
Marián Kolesár
(Institute of Particle and Nuclear Physics, Faculty of Mathematics and Physics, Charles University, Prague)
