@Article{Feng_etal2024, author="Feng, Y. C. and Gil, F. and D{\"o}ring, M. and Molina, R. and Mai, M. and Shastry, V. and Szczepaniak, A.", title="Unitary coupled-channel three-body amplitude with pions and kaons", journal="Physical Review D", year="2024", publisher="Amer Physical Soc", volume="110", number="9", pages="094002--21pp", abstract="Three-body dynamics above threshold is required for the reliable extraction of many amplitudes and resonances from experiment and lattice QCD. The S-matrix principle of unitarity can be used to construct dynamical coupled-channel approaches in which three particles scatter off each other, rearranging two-body subsystems by particle exchange. This paper reports the development of a three-body coupled-channel, amplitude including pions and kaons. The unequal-mass amplitude contains two-body S- and P-wave subsystems ({\textquoteleft}{\textquoteleft}isobars{\textquoteright}{\textquoteright}) of all isospins, I = 0, 1/2, 1,3/2, 2, and it also allows for transitions within a given isobar. The f 0 ( 500 )( 6 ) ,f 0 ( 980 ) , p ( 700 ) ,K * 0 ( 700 )( K ) , and K * ( 892 ) resonances are included, apart from repulsive isobars. Different methods to evaluate the amplitude for physical momenta are discussed. Production amplitudes for a 1 quantum numbers are shown as a proof of principle for the numerical implementation.", optnote="WOS:001350063800004", optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=6332), last updated on Tue, 19 Nov 2024 07:41:43 +0000", issn="2470-0010", doi="10.1103/PhysRevD.110.094002", opturl="https://arxiv.org/abs/2407.08721", opturl="https://doi.org/10.1103/PhysRevD.110.094002", language="English" }