TY  - JOUR
AU  - Baeza-Ballesteros, J.
AU  - Bijnens, J.
AU  - Husek, T.
AU  - Romero-Lopez, F.
AU  - Sharpe, S. R.
AU  - Sjo, M.
PY  - 2023
DA  - 2023//
TI  - The isospin-3 three-particle K-matrix at NLO in ChPT
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 187
EP  - 56pp
VL  - 05
IS  - 5
PB  - Springer
KW  - Chiral Lagrangian
KW  - Hadronic Spectroscopy
KW  - Structure and Interactions
KW  - Lattice QCD
AB  - The three-particle K-matrix, K-df,K-3, is a scheme-dependent quantity that parametrizes short-range three-particle interactions in the relativistic-field-theory three particle finite-volume formalism. In this work, we compute its value for systems of three pions at maximal isospin through next-to-leading order (NLO) in Chiral Perturbation Theory (ChPT). We compare the values to existing lattice QCD results and find that the agreement between lattice QCD data and ChPT in the first two coefficients of the threshold expansion of K-df,K-3 is significantly improved with respect to leading order once NLO effects are incorporated.
SN  - 1029-8479
UR  - https://arxiv.org/abs/2303.13206
UR  - https://doi.org/10.1007/JHEP05(2023)187
DO  - 10.1007/JHEP05(2023)187
LA  - English
N1  - WOS:000994292300001
ID  - Baeza-Ballesteros_etal2023
ER  -