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FeynCalc / feyncalc

Mathematica package for algebraic calculations in elementary particle physics.
https://feyncalc.github.io
GNU General Public License v3.0
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Whats going wrong with DiracTrick ? #18

Closed kirtimaan closed 7 years ago

kirtimaan commented 7 years ago

Dear feyncalc authors, The following code works with Mathematica v9 and Feyncalc v 9.1.0 :

(1/2 - DiracGamma[5]/2) . (-((mQf + DiracGamma[Momentum[p + q]])/(-mQf^2 + Pair[Momentum[p + q], Momentum[p + q]]))) . (1/2 + DiracGamma[5]/2)// DiracSimplify

However with Feyncalc v9.2.0 it throws up the following error and Aborts:

"DiracTrick::failmsg: Error! DiracTrick has encountered a fatal problem and must abort the computation. The problem reads: Incorrect combination of dimensions and g^5 scheme! >>"

vsht commented 7 years ago

Thanks for the bug report, this should be now fixed. Please reinstall FeynCalc and try again.