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We present new results on FeynOnium, an ongoing project to develop a generalpurpose software toolkit for semi-automatic symbolic calculations innonrelativistic Effective Field Theories (EFTs). Building upon FeynCalc, anexisting Mathematica package for symbolic evaluation of Feynman diagrams, wehave created a powerful framework for automatizing calculations innonrelativistic EFTs (NREFTs) at tree- and 1-loop level. This is achieved byexploiting the novel features of FeynCalc that support manipulations ofCartesian tensors, Pauli matrices and nonstandard loop integrals. Additionaloperations that are common in nonrelativistic EFT calculations are implementedin a dedicated add-on called FeynOnium. While our current focus is on EFTs forstrong interactions of heavy quarks, extensions to other systems that admit anonrelativistic EFT description are planned for the future. All our codes areopen-source and publicly available. Furthermore, we provide several examplecalculations that demonstrate how FeynOnium can be employed to reproduce knownresults from the literature.

FeynOnium: Using FeynCalc for automatic calculations in Nonrelativistic Effective Field Theories