mismatch for incoming particles defined als chiral due to wrong beam setup
For particles defined in the model setup as chiral there is mismatch of a factor 2 per incoming chiral particle. The beam set-up seems to be wrong in that case.
Finally, it turned out that this is treated correctly in WHIZARD 2 (confirmed by analytic calculation and comparison with CalcHEP. Whizard 1, Sherpa and Madgraph are wrong for processes with Weyl spinors in the initial state).
I change this into a task for an update of WHIZARD 1.93.
Change History (6)
| Keywords: |
incoming Weyl fermions added
|
| Priority: |
major →
minor
|
| Component: |
core →
models
|
| Description: |
modified (diff)
|
| Priority: |
minor →
P4
|
| Severity: |
→ normal
|
| Version: |
2.0.0 →
1.93
|
| Milestone: |
v2-compiles-gfortran →
v1.9x
|
| Resolution: |
→ wontfix
|
| Status: |
assigned →
closed
|
This seems to be correct in WHIZARD 2.0 and wrong in WHIZARD 1 (thereby then also in MadEvent? and Sherpa). W1 seems to has been forgotten the fact that neutrinos are automatically polarized. Awaiting confirmation from one of the other WHIZARD authors.