particle/antiparticle confusion in O'Mega restrictions

[Juergen Reuter]

For processes with restrictions on the s-channel the particles seem to be switched into their antiparticles. Example:

omega_SM.opt -cascade '1+2~e-' -scatter "e- A -> e- A"

gives no valid diagram, while

omega_SM.opt -cascade '1+2~e+' -scatter "e- A -> e- A"

gives the diagram as expected. Should be a trivial thing.

[ohl]

Well,

omega_SM.opt -scatter "e+ A -> e+ A " -cascade  "3 + 4 ~ e+"

works. But I agree that this behaviour might be seen as counter intuitive. I'll probably change it.

[Juergen Reuter]

According to our bug fixing policy this should be handled quickly, if there is no easy, working solution for it we should document this behavior, but I find it strange.

[ohl]

I could use a hack to fix this trivially, but this hack wouldn't break decays only by accident and could cause problems down the road. I'd rather implement a correct solution that takes care of all differences between scatterings and decays.

[Juergen Reuter]

Isn't the solution just to cross all incoming particles in the restrictions??

[Juergen Reuter]

Milestone renamed

[Juergen Reuter]

Milestone renamed