Speaker
Mattias Sjö
(CPT, Aix-Marseille University)
Description
Three-hadron systems are an active topic in lattice QCD, primarily due to their relevance to the study of hadronic resonances with three-body decays. The systematics of such challenging systems -- finite-volume effects and the pion-mass dependence -- can be connected to the elastic three-to-three scattering amplitude, which can in turn be computed in chiral perturbation theory. I describe a series of works in which we calculate this six-point amplitude to next-to-leading order and then relate it to the lattice, covering all cases involving only pions and setting the stage for further developments. In the maximum-isospin channel, our results resolve most of the tension previously seen between lattice QCD and the leading-order amplitude.
Primary authors
Fernando Romero-Lopez
(Uni Bern)
Johan Bijnens
(Lund University)
Mr
Jorge Baeza-Ballesteros
(Universitat de València)
Mattias Sjö
(CPT, Aix-Marseille University)
Stephen Sharpe
(University of Washington)
Tomáš Husek
(Charles University and University of Birmingham)
