Speaker
Dr
Marián Kolesár
(Institute of Particle and Nuclear Physics, Faculty of Mathematics and Physics, Charles University, Prague)
Description
Using the most recent experimental data and lattice calculations of scattering lengths of $\pi\pi$ scattering and employing dispersive representation of the amplitude based on Roy equations, we compute the subthreshold parameters of this process. We use Monte Carlo sampling to numerically model the probability distribution of the results based on all uncertainties in the inputs. In the second part of the analysis, we use the new results for the subthreshold parameters to obtain constraints on the leading order low energy constant $B_0$ in the context of three-flavour chiral perturbation theory.
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)
