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Auto decay width computation with MadGraph #440

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TehMeh opened this issue Oct 9, 2020 · 0 comments
Open

Auto decay width computation with MadGraph #440

TehMeh opened this issue Oct 9, 2020 · 0 comments
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enhancement New feature or request

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@TehMeh
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TehMeh commented Oct 9, 2020

Hi,

when changing the mass or some other parameter relevant to the decay width, reweighting does not really work or might not work as intended.
Say, if I set the decay width is to be automatically computed by MG in the param card template, then this automatic computation is not performed when reweighting.
When reweighting, MadGraph simply uses param_card_default.dat which is generated by MG in the process folder - by default the decay widths are taken from UFO files and are not set to auto. So when one wants to have these adaptive decay widths, the reweighting card has to have additional entries like set decay <pdgID> auto.
Probably decay width is not really a "parameter" to be included in a morphing set up, so maybe an option to separately include this decay information would be convenient.

@johannbrehmer johannbrehmer self-assigned this Oct 9, 2020
@johannbrehmer johannbrehmer added the enhancement New feature or request label Oct 9, 2020
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