WebObtain the amplitude The 1/ (2Pi)^D prefactor is implicit. amp[0] = FCFAConvert[CreateFeynAmp[diags, Truncated -> True, PreFactor -> 1], IncomingMomenta -> {p}, OutgoingMomenta -> {p}, LoopMomenta -> {q}, LorentzIndexNames -> {mu, nu}, UndoChiralSplittings -> True, ChangeDimension -> D, … Weballints = Cases2[amp[2], TFI]; Length[allints] There are 271 integrals to be done for the ghost self energy. There are several possibilities how to proceed. One possibility is to calculate the integrals one by one and save them to a file in the Database directory. This can be conveniently done using the CheckDB function.

· FeynCalc - GitHub Pages

WebFCFAConvert — converts a FeynArts amplitude to FeynCalc. FCPrepareFAAmp — auxiliary function for a partial conversion of a FeynArts amplitude to FeynCalc. FermionSpinSum — constructs Dirac traces out of squared ampliudes with external Dirac fermions. FeynRule — determines Feynman rules from Lagrangians. FieldDerivative — … WebVladyslav. Am 11.07.20 um 13:06 schrieb Endif Constant: > I had installed FeynCalc 9.3.1 and Feynarts 3.11 (offline automatic installation). But when I was learning about $\phi^4$ theory and the input the example “Phi Phi scattering at 1-loop” in mathematica notebook, I found that Feynarts may not work. > Firstly, I input the code of ... koshino classification

QCD ghost self-energy · FeynCalc - GitHub Pages

WebPure Yang-Mills 1-loop gluon self-energy in the background field formalism Load FeynCalc and the necessary add-ons or other packages WebApr 22, 2016 · FCFAConvert, a new. FeynCalc routine that handles the conv ersion according to the options submitted by the user. The resulting expression. amps. is a list with four en tries that corresp ond to ... WebThe Higgs diagram is needed to cancel the divergence that goes like m_e*Sqrt[s] in the high energy limit. If we neglect the electron mass, then this particular diagram does not contribute. koshin ms-erh50th85