  $\tt DsixTools$ is a Mathematica package for the handling of the Standard
Model Effective Field Theory (SMEFT) and the Low-energy Effective Field Theory
(LEFT) with operators up to dimension six, both at the algebraic and numerical
level. $\tt DsixTools$ contains a visually accessible and operationally
convenient repository of all operators and parameters of the SMEFT and the
LEFT. This repository also provides information concerning symmetry categories
and number of degrees of freedom, and routines that allow to implement this
information on global expressions (such as decay amplitudes and
cross-sections). $\tt DsixTools$ also performs weak basis transformations, and
implements the full one-loop Renormalization Group Evolution in both EFTs (with
SM beta functions up to five loops in QCD), and the full one-loop SMEFT-LEFT
matching at the electroweak scale.
