[Rivet] JIMMY parameters in AGILe

[Holger Schulz]

Hi Jonathan,
>
> JMRAD() is the array defining the area of the particles in units of 
> GeV^-2 (inverse radius squared!)
So it can be pictured as the geometrical cross-section of the particles 
plane perpendicular to the
beam direction, right?
>
> PRRAD in Agile is a shorthand used to set these parameters such that
> JMRAD(73)=JMRAD(91)=PRRAD.
Ok, so Arthur's setting of JMRAD(73) = 2.2 should translate to PRRAD = 
2.2, right?
What keeps me worried is that there is a file in AGILe, called 
fherwig-atlas-default.params
where the setting of PRRAD is 0.71, which is also the default in Jimmy.
However, the MC08 setting is quoted by Arthur to be 1.8.
If this is all correct, do you think that a setting of 2.2 is still 
reasonable? What
would is the meaningful parameter range?


>
> The offset by one is just from c++ starting arrays at 0 when fortran 
> starts them at 1.
D'oh!

Holger