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I have used OneLoop function, the result is expressed involving B0[pp,0,0].

I know B0 is the scalar integral of Passarino-Veltman reduction, but I wonder can also B0 be reduced to some explicit form, just like terms of log, gamma(Eulers constant) such that?

Are there some useful function to deal with two-loop amplitudes?

pre-Thanks!

Tyger

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