Opened 15 years ago
Last modified 15 years ago
#7 closed defect
mismatch for incoming particles defined als chiral due to wrong beam setup — at Version 3
| Reported by: | Juergen Reuter | Owned by: | Juergen Reuter |
|---|---|---|---|
| Priority: | P4 | Milestone: | |
| Component: | models | Version: | 1.93 |
| Severity: | normal | Keywords: | beam setup, incoming Weyl fermions |
| Cc: |
Description (last modified by )
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 (3)
comment:1 Changed 15 years ago by
| Status: | new → assigned |
|---|
comment:2 Changed 15 years ago by
| Keywords: | incoming Weyl fermions added |
|---|---|
| Priority: | major → minor |
comment:3 Changed 15 years ago by
| Component: | core → models |
|---|---|
| Description: | modified (diff) |
| Priority: | minor → P4 |
| Severity: | → normal |
| Version: | 2.0.0 → 1.93 |
Note: See
TracTickets for help on using
tickets.
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.