No phase space issue

Bug #2020357 reported by Daniel Schieber
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
MadGraph5_aMC@NLO
New
Undecided
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Bug Description

Hello,

if i launch a process in a kinematically forbidden area, it will show no phase space. If I increase the beam energy to an allowed area, it will then also return no phase space as well as no results.dat file found.

For example: e+e- -> z h
At 200 GeV it will not work.
Restarting MadGraph and launching at 400 GeV should work, but it does not.
If i just create the process and launch it directly at 400 GeV, it works as intended.

In the previous version (3.4.2), there was no such issue.

Revision history for this message
Olivier Mattelaer (olivier-mattelaer) wrote :

Thanks for the notification,

We tried to be less agressive on the systematic recompilation of the code. But this seems to be problematic in that specific case.

Here is a fix for that situation:
https://github.com/mg5amcnlo/mg5amcnlo/commit/4f2b8b623a6cd90248d6d6b1bbbc9d90abe0c797

Thanks,

Olivier

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