[Halld-physics] [Halld-offline] pilot run for pwa: event generation

[Curtis A. Meyer]

Hi Craig -

  sorry for being out of this loop until now. The ruby fitter code does 
exist and is
being used at CMU. It is based on the qft++ amplitude code which has some
limitations, but if you can write the amplitudes as tree-level 
amplitudes will
work.

   There are many philosophies on how to do PWA. Much depends on the 
underlying
computers. Matt has bee focusing on getting (what we hope is) more 
realistic amplitudes
and having them calculated dynamically in the fit. The ruby code was 
based on a more
static model where you could compute the amplitudes once and then read 
them into
memory. There are pros and cons of each, but for what you want to do on 
a 6-month
time scale, the difference is probably moot.

    The ruby stuff is at the following URLs:

qft++     http://www-meg.phys.cmu.edu/williams/qft++/index.php/main_page

ruby-pwa    
http://www-meg.phys.cmu.edu/~williams/wiki-ruby-pwa/index.php/Main_Page

curtis

On 3/17/10 6:00 PM, Matthew Shepherd wrote:

-- 
Prof. Curtis A. Meyer		Department of Physics
Phone:	(412) 268-2745		Carnegie Mellon University
Fax:	(412) 681-0648		Pittsburgh PA 15213-3890
cmeyer at ernest.phys.cmu.edu	http://www.curtismeyer.com/