Monday 9am-12   B084 R140

Jeff Gronberg - Pandora
Discussion :   How can we contribute to the Pandora effort?
               beam file inputs
               SPYTHIA is best
               plan of action

general discussion:   March 8-11 workshop
                      summer Snowmass

       ....................................................

Important:
 - avoid MC wars - they waste time and energy
 - use the *same* programs to begin with.  Once we are sure
     of ourselves, then examine the dependence on MC assumptions
 - Need a standard, maintained, documented setup for each
     component in the chain.
 - Do we need to share files?
 
 

The MC chain:
  1. beam phase space files
  2. event generation (SPYTHIA)
  3. detector simulation (SHW?)
 
 

       .....................................
PYTHIA
  process 58 is 2photons -> ffbar     Bar90
          69             -> W+W-      Kat83
          85             -> FFbar     Bar90
         108             -> J/psi gamma   Jun97
         103             -> H0        Dre89
         119             -> gg        not implemented (1998)
         153             -> H'0       Dre89
         158             -> A0        Dre89

8.3.2 p122 ISUB=58,85
Photons have point-like and hadronic structure.  MSTP(14)
  see section 7.7.2
To simulate photons beams, use 'gamma' as argument to PYINIT.
Use CKIN to impose min-PT requirements.

8.3.5 p.127 ISUB=69
narrow width approximation

8.4.1 p.128 ISUB=103

7.7.2 p.109
Physical photon is linear superposition of bare photon, vector mesons,
qqbar pairs ("anomalous" or "QCD"), and lepton pairs.
We are probably interested in the bare photon interactions (high pt),
but we have to check backgrounds and event rates from hadronic photon
structure.