Pion-pion scattering in χPT with virtual photons

Infrared divergent parts

Configuration:  "ChPTVirtualPhotons2"
Lagrangians:  ChPTVirtualPhotons2[2], ChPTVirtualPhotons2[4]

Isospin indices. Run the whole notebook for each set of values.

(* k1 = 1 ; k2 = 2 ; k3 = 2 ; k4 = 1 ; *) (* ok *)

(* k1 = 1 ; k2 = 2 ; k3 = 1 ; k4 = 2 ; *) (* ok *)

(* k1 = 1 ; k2 = 1 ; k3 = 1 ; k4 = 1 ; *) (* ok *)

(* k1 = 1 ; k2 = 1 ; k3 = 2 ; k4 = 2 ; *) (* ok *)

(* k1 = 2 ; k2 = 2 ; k3 = 1 ; k4 = 1 ; *) (* ok *)

(* k1 = 2 ; k2 = 2 ; k3 = 2 ; k4 = 2 ; *) (* ok *)

(* k1 = 2 ; k2 = 1 ; k3 = 2 ; k4 = 1 ; *) (* ok *)

(* k1 = 2 ; k2 = 1 ; k3 = 1 ; k4 = 2 ; *) (* ok *)

SetOptions[CheckF, ForceSave -> True]

{Directory -> D:\\Program Files\\Wolfram Research\\Mathematica\\4.1\\AddOns\\Applications\\HighEnergyPhysics\\Phi\\Storage, ForceSave -> True, NoSave -> False}

•The soft photon fourth order tree amplitude

•Generation of topologies and insertion of fields

•Calculation of the amplitude

Converted by Mathematica  (July 10, 2003)