Name: Vladyslav Shtabovenko (email_not_shown)
Date: 07/19/15-01:44:05 AM Z


Hi,

please try the latest development snapshot. The issue
should be now fixed.

Cheers,
Vladyslav

Am 13.07.2015 um 11:38 schrieb Vladyslav Shtabovenko:
> Hi,
>
> thanks for reporting this. The underlying issue is the same as in,
>
> http://www.feyncalc.org/forum/0935.html
>
> namely SPC not simplifying everything it should. I'm working on a fix.
>
> As a workaround you can use
>
> TID[Pair[Momentum[k1, d], Momentum[q1, d]]^2 FeynAmpDenominator[
> PropagatorDenominator[Momentum[q1, d], mt],
> PropagatorDenominator[Momentum[p2, d] + Momentum[q1, d], mt],
> PropagatorDenominator[-Momentum[k1, d] + Momentum[p2, d] +
> Momentum[q1, d], mt],
> PropagatorDenominator[-Momentum[k1, d] - Momentum[k2, d] +
> Momentum[p2, d] + Momentum[q1, d], 0]], q1,
> UsePaVeBasis -> True] // ToPaVe[#, q1] &
>
> This simplifies the integral to PaVe coefficient functions, not PaVe
> scalar integrals as TID does by default.
>
> Cheers,
> Vladyslav
>
>
> Am 12.07.2015 um 06:49 schrieb Xing Wang:
>> Hi. I got an error when I try to use OneLoopSimplify to do tensor reduction for a box integral.
>>
>> OneLoopSimplify[
>> Pair[Momentum[k1, d], Momentum[q1, d]]^2 FeynAmpDenominator[
>> PropagatorDenominator[Momentum[q1, d], mt],
>> PropagatorDenominator[Momentum[p2, d] + Momentum[q1, d], mt],
>> PropagatorDenominator[-Momentum[k1, d] + Momentum[p2, d] +
>> Momentum[q1, d], mt],
>> PropagatorDenominator[-Momentum[k1, d] - Momentum[k2, d] +
>> Momentum[p2, d] + Momentum[q1, d], 0]], q1]
>>
>> It says:
>> TID::failmsg: Error! TID has encountered a fatal problem and must abort the computation. The problem
>> reads: tidSingleIntegral failed to achieve full tensor reduction in {-FeynAmpDenominator[PropagatorDenominator[Momentum[q1, d], 0], Propagat\[Ellipsis] ID`Private`tidIsolate[203]]^3*Pair[Momentum[-k1 - k2 + p2, d], Momentum[q1, d]])/(8*HoldForm[FeynCalc`TID`Private`tidIsolate[204]]^3)}
>>
>> Thanks in advance,
>> Xing
>>
>



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