SubProcesses doesn't have available phase-space.
Dear MadGraph experts,
I am trying to generate RPV SUSY events with MG version 2.6.7. The process string is:
process = '''
import model RPVMSSM_UFO
define susylq = ul ur dl dr cl cr sl sr
define susylq~ = ul~ ur~ dl~ dr~ cl~ cr~ sl~ sr~
generate p p > t1 t1~ j j $ go susylq susylq~ b1 b2 t2 b1~ b2~ t2~
'''
This fails with the error: "P1_gg_t1t1xgg SubProcesses doesn't have available phase-space. Please check mass spectrum."
Interestingly, the generation of the problematic subprocesses alone (g g > t1 t1~ g g ) works just fine.
I've found that setting QED=0 also solves the issue, however I do not understand why QED couplings are causing an issue here.
Does anyone have an idea why this is happening?
Thank you,
Emily
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