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Opened 14 years ago

Closed 8 years ago

Last modified 7 years ago

#326 closed defect (wontfix)

particle/antiparticle confusion in O'Mega restrictions

Reported by: Juergen Reuter Owned by: ohl
Priority: P2 Milestone: v2.6.0
Component: omega Version: 2.0.2
Severity: normal Keywords: diagram generator
Cc:

Description

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.

Change History (9)

comment:1 Changed 14 years ago by ohl

Status: newassigned

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.

comment:2 Changed 14 years ago by 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.

comment:3 Changed 14 years ago by ohl

Milestone: v2.0.3v2.1

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.

comment:4 Changed 13 years ago by Juergen Reuter

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

comment:5 Changed 13 years ago by ohl

Priority: P3P2

comment:6 Changed 8 years ago by Juergen Reuter

Milestone: v2.3.1v2.4.0

comment:7 Changed 8 years ago by Juergen Reuter

Resolution: wontfix
Status: assignedclosed

comment:8 Changed 8 years ago by Juergen Reuter

Milestone: v2.4.0v2.5.0

Milestone renamed

comment:9 Changed 7 years ago by Juergen Reuter

Milestone: v2.5.0v2.6.0

Milestone renamed

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