Package-X: A Mathematica package for the analytic calculation of one-loop integrals

Abstract Package-X, a Mathematica package for the analytic computation of one-loop integrals dimensionally regulated near 4 spacetime dimensions is described. Package-X computes arbitrarily high rank tensor integrals with up to three propagators, and gives compact expressions of UV divergent, IR divergent, and finite parts for any kinematic configuration involving real-valued external invariants and internal masses. Output expressions can be readily evaluated numerically and manipulated symbolically w... Title of program: Package-X Catalogue Id: AEXT_v1_0 Nature of problem Analytic calculation of one-loop integrals in relativistic quantum field theory for arbitrarily high-rank tensor integrals and any kinematic configuration of real-valued external invariants and internal masses. Versions of this program held in the CPC repository in Mendeley Data AEXT_v1_0; Package-X; 10.1016/j.cpc.2015.08.017 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)