ROOT::Math::PtEtaPhiMVector> usage problem

Dear experts,

I am using ROOT::Math::PtEtaPhiMVector and are running into some problems. here is the code snippts:

ROOT::Math::PtEtaPhiMVector jets(a, b, c, d); 
ROOT::Math::PtEtaPhiMVector muons(e, f, g, h);
auto MHTsum = (jets+muons).Vect();
auto sum = MHTsum* MHTsum;

The compliler is complaining in the last line saying something about the operand “*” not working. As you can see I just want to multiply the TVector3 .


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ROOT Version: 6.22
Platform: Not Provided
Compiler: gcc9

Maybe you want: MHTsum.Mag2()