**Next message:**Vladyslav Shtabovenko: "Re: Polarization sums with dummy indices"**Previous message:**Vladyslav Shtabovenko: "Re: Can Feynman rules be generated automatically?"**Maybe in reply to:**Ben: "Polarization sums with dummy indices"**Next in thread:**Vladyslav Shtabovenko: "Re: Polarization sums with dummy indices"**Reply:**Vladyslav Shtabovenko: "Re: Polarization sums with dummy indices"**Messages sorted by:**[ date ] [ thread ] [ subject ] [ author ]**Mail actions:**[ respond to this message ] [ mail a new topic ]

I found some strange behavior for DoPolarizationSums. Let

tmp = Conjugate[PolarizationVector[p, mu]] PolarizationVector[p, nu]

1) DoPolarizationSums[tmp+1,p] gives

3+e_{mu} e_{nu}

which is ok for number, but this command did nothing with polarizations.

2) DoPolarizationSums[tmp+1,p,0] gives

4-g_{mu,nu}

which is ok for tensor structure, but I expected 2 as a number.

3) DoPolarizationSums[tmp+1,p,p] gives

2 + (-g_{mu,nu} + p_{mu}p_{nu}/p^2)

which is ok for gluons, but it is not applicable for massive patricles because of 2, then 3.

**Next message:**Vladyslav Shtabovenko: "Re: Polarization sums with dummy indices"**Previous message:**Vladyslav Shtabovenko: "Re: Can Feynman rules be generated automatically?"**Maybe in reply to:**Ben: "Polarization sums with dummy indices"**Next in thread:**Vladyslav Shtabovenko: "Re: Polarization sums with dummy indices"**Reply:**Vladyslav Shtabovenko: "Re: Polarization sums with dummy indices"**Messages sorted by:**[ date ] [ thread ] [ subject ] [ author ]**Mail actions:**[ respond to this message ] [ mail a new topic ]

*
This archive was generated by hypermail 2b29
: 08/21/18-02:00:01 AM Z CEST
*