feyncalc
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FeynCalc
Mathematica package for algebraic calculations in elementary particle physics.
This code is not really compatible with fermion fields: https://github.com/FeynCalc/feyncalc/blob/ca803c11325273e39ee1fecb951c6bd9866e74c2/FeynCalc/Feynman/ExpandPartialD.m#L266-L270 Ideas: Check for Dirac indices, introduce dedicated `DataType`s
Here is an example of a factorizing 3-loop integral that cannot be properly graphed ``` FCLoopIntegralToGraph[ SFAD[{{I*p1, 0}, {-m1^2, -1}, 1}]* SFAD[{{I*(p2 - p3), 0}, {-m1^5, -1}, 1}]* SFAD[{{I*(p3 +...
FCLoopApplyTopologyMappings alone is not sufficient to write the given amplitude as a linear combination of GLIs (or products thereof).
* Your Mathematica version ```12.3.1 for Linux x86 (64-bit) (June 24, 2021)`` * Your FeynCalc version ```9.3.1``` * Did you try to reinstall FeynCalc (stable version) using the automatic installer...
This is to fix the issue #151 . A concern is that this will cause `FCUseCache[]` to actually cache the dependency indefinitely until `FCClearCache[]` is called manually. This might cause...
FCFeynmanParametrize currently supports only Feynman parametrization. It would be good to have Schwinger, Lee-Pomeransky and Baikov working as well. At least for pure denominator integrals.
This doesn't work ``` PauliTrace[SI[a, b]] // PauliSimplify ``` This sort of works ``` PauliTrace[SI[a, b]] // LorentzToCartesian // PauliSimplify ```
SUNSimplify and SUNTrace require a serious refactoring, since many expressions cannot be simplified straightforwardly, yet after some fiddling with the Explicit and SUNTrace options one can still get the desired...
Tensor decompositions of high rank integrals or integrals with many legs tend to become very large. It is not efficient to load them from text files, as this may significantly...
The idea is to have a useful visualization of calculations that go like ``` res = Map[evalFun[#]&, aLotOfAmps] ``` Currently there is no nice way to see - How many...