segfault while compiling g g > g g g g g --answered
Bug #870394 reported by
Wojciech Kotlarski
This bug report was converted into a question: question #173616: segfault while compiling g g > g g g g g.
This bug affects 1 person
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| MadGraph5_aMC@NLO |
Invalid
|
Wishlist
|
Unassigned | ||
Bug Description
While trying to compile a code for process g g > g g g g g gfortran quits with segmentation fault. This is always reproducible and was checked on two different computers with different versions of Linux (Fedora and Arch) and on a cluster. This concerns only 7-point gluon amplitude. Processes of a type g g > g g g q q compile without a problem. This problem persist from version 1.3.13 but I haven't checked earlier versions.
Revision history for this message
| Olivier Mattelaer (olivier-mattelaer) wrote | #1 |
| Changed in madgraph5: | |
| status: | New → Invalid |
| summary: |
- segfault while compiling g g > g g g g g + segfault while compiling g g > g g g g g --answered |
| Changed in madgraph5: | |
| importance: | Undecided → Wishlist |
To post a comment you must log in.
I don't think that they are any `real` problem whith the output, simply the 7 gluon amplitude output file
are just too large that it's not possible to compile it.
One of the main problem is the size of the color matrix which is much smaller for g g > g g g q q.
Concerning your process, I would advice you to look at the following talk:
https:/
The author modifies the output of MG5 in order to be able to compile the output and to compute it.
I suggest you to contact him directly.
They are also work in order to be able to treat efficiently this type of process inside MG5 but that's work under progress.
Cheers,
Olivier
PS: I consider this more as a question than a real bug. So I'll convert it to a question.