Decay chain generation syntax
I'm looking into the decay chains whose Feynman diagrams I attached bellow. I would like to know if my generation syntax is correct (I'm a bit confused with the use of parenthesis). Where can I find the documentation about the generation syntax and MG?
generate e+ e- > ta+ ta- zp, zp > mu+ mu-, ta+ > mu+ vm vt~, ta- > mu- vt vm~ for https:/
and
generate e+ e- > mu+ mu- zp, (zp > ta+ ta-, ta+ > mu+ vm vt~, ta- > mu- vt vm~) for
https:/
In both cases the code works, but I get the same WARNING: Particle 15 will use a fake width ( 1.777e-06 instead of 2.265e-12 ).
Cross-section will be rescaled according to NWA if needed.To force exact treatment reduce the value of 'small_
Thank you!
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