problems with UFO in madgraph
I generated a UFO for madgraph using Feynrules. The UFO is related to a new simple Lagrangian containing a scalar interaction with electrons and muons. No error at the Feynrules stage, all is working fine. However when I import the corresponding UFO in Madgraph using the command import UFOnamedirectory,
an error appears only when I am running a process that contains particles and interactions different from the ones defined in the UFO. For the interactions and particles appearing in the UFO, all is OK in madgraph.
Although, in madgraph the SM particle seems to be recognized, if I try for example to generate a simple SM process it gives me the following error (while it works fine for processes generated by the imported UFO lagrangian), notice that tau is not appearing in the new lagrangian
generate e+ e- > tau+ tau -
the output in ""
"Command "generate e+ e- > ta+ ta-" interrupted with error:
NoDiagramException : No amplitudes generated from process Process: e+ e- > ta+ ta- WEIGHTED=4 @1. Please enter a valid process"
Any idea where the error could be ?
I run madgraph using python2.7 in ubuntu.
Thanks in advance for your help.
Best regards, Emidio Gabrielli
Question information
- Language:
- English Edit question
- Status:
- Answered
- Assignee:
- No assignee Edit question
- Last query:
- Last reply:
Can you help with this problem?
Provide an answer of your own, or ask Emidio Gabrielli for more information if necessary.