engIsken, TobiasGuo, Xiao-YuHeo, YonggooKorpa, Csaba L.Lutz, MatthiasTriangle and box diagrams in coupled-channel systems from the chiral Lagrangianinfo:eu-repo/classification/ddc/530We perform an analysis of triangle- and box-loop contributions to the generalized potential in the scattering of Goldstone bosons off the 𝐽𝑃 =0− and 1− charmed mesons. Particular emphasis is put on the use of on-shell mass parameters in such contributions in terms of a renormalization scheme that ensures the absence of power-counting violating terms. This is achieved with a systematically extended set of Passarino-Veltman basis functions that leads to manifest power-counting conserving one-loop expressions and avoids the occurrence of superficial kinematical singularities. Compact expressions to chiral order three and four are presented that are particularly useful in coding such coupled-channel systems. Our formal results are generic and prepare analogous computations for other systems, like meson-baryon scattering from the chiral Lagrangian.Physical review / D 109(3), 034032 (2024). doi:10.1103/PhysRevD.109.034032info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAmerican Physical Society2024info:eu-repo/semantics/openAccessDEhttps://repository.gsi.de/record/354668https://repository.gsi.de/search?p=id:%22GSI-2024-01147%22Researchersinfo:eu-repo/semantics/altIdentifier/wos/WOS:001183211100009info:eu-repo/semantics/altIdentifier/issn/2470-0010info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.109.034032info:eu-repo/semantics/altIdentifier/issn/2470-0029info:eu-repo/semantics/altIdentifier/issn/2470-0037info:eu-repo/semantics/altIdentifier/doi/10.15120/GSI-2024-01147