FeynHelpers manual (development version)

PSDLoopRegions

PSDLoopRegions[name, loopIntegral, order, smallnessParameter] is an auxiliary function that creates input for pySecDec’s loop_regions routine. The results is returned as a string.

PSDLoopPackage is used by PSDCreatePythonScripts when assembling the generation script for an asymptotic expansion.

See also

Overview, PSDCreatePythonScripts, PSDIntegrate, PSDLoopIntegralFromPropagators, PSDLoopPackage.

Examples

PSDLoopRegions["loopint", "li", 2, z]

loop_regions(\nname = ’loopint’,\nloop_integral = li,\nsmallness_parameter = ’z’,\nexpansion_by_regions_order = 2,\ndecomposition_method = ’geometric’\n)\text{loop$\_$regions($\backslash $nname = 'loopint',$\backslash $nloop$\_$integral = li,$\backslash $nsmallness$\_$parameter = 'z',$\backslash $nexpansion$\_$by$\_$regions$\_$order = 2,$\backslash $ndecomposition$\_$method = 'geometric'$\backslash $n)}