[Rivet] How to configure generators with Agile?

[Andy Buckley]

On 01/07/13 22:49, Ulla Blumenschein wrote:
> Dear all,
> 
> I can't find any Agile documentation that explains anything beyond how
> to setup the center of mass energy or the nature of the colliding particles.
> Where can I find documentation/examples of how to setup the various
> paratemeters for a specific generator?
> Lets take a super-easy example: I want to run Pythia Z->ee.  How do I do it?

Try agile-runmc --help : it tells you everything. There are also
instructions in the Rivet tutorial slides and PDF manual.

Generally the answer is that to set parameters away from their defaults
you use -p "PARAM=VALUE" arguments to agile-runmc, or -P paramfile to
read a collection of such settings from a file. Both -p and -P can be
specified multiple times. After that it's up to you to read the
generator manual to choose which params to set, but for PYTHIA6 Z->ee
you'll want to set something like MSEL=11 (check that, I forget the code
since I run Pythia8 more these days) and add -P fpythia-Zee.params to
restrict the Z/gamma* decays to ee only.

Andy

-- 
Dr Andy Buckley, Royal Society University Research Fellow
Particle Physics Expt Group, University of Edinburgh / PH Dept, CERN