How to set the event scale for PDFs?

[Juergen Reuter]

Right now, when I print out the values I only get a running scale. The logic should be a command like

beams p,p => lhapdf { scale = 1500 GeV }

but it does not work.

[Juergen Reuter]

OK, it works if I do the following:

scale = 1500 GeV
beams p,p => lhapdf 

so not having this as an optional argument for beams. I'm (almost) fine with this, especially if scale is not only a number, but a more complicated expression. I want to test the scales a little further, as this is one of the important new features of WHIZARD.

[kilian]

Ah, now I see the point. You can set the scale local to the integrate command:

integrate (proc) { scale = 1500 GeV }

but if you make it local to the beams command, it is forgotten once the beam command has been executed.

The rationale is that the scale expression is a property of the process (better: of the beam-process interface which is set up by the integrate command), not of the beams.

[Juergen Reuter]

Now the question is how to I set a scale like the Pt of a lepton???

[Juergen Reuter]

Wolfgang explained it to me: it is e.g.

scale = eval Pt [e1]

etc. There will be one example in the examples.

[Juergen Reuter]

Milestone v2.0.0final deleted