1. gp g K+L Cross section measurement
-0.55 < qK+ < -0.45
Example Cross section for cos(qK+) = -0.5
Black = our data
Red = SAPHIR data (2004)
Blue = JLab data (2006)
T C Jude, The University of Edinburgh, Strangeness Photoproduction A2 Analysis meeting, Mainz, September 2008

2. Adopt JLab convention:
~ 0.6
Target pressure ~ kgm-3
Corresponds to E(28) protons m-3
Target length = m
Target density per unit area, r = E(27) protons m-2
So W = 0.1
Adopt JLab convention:
T C Jude, The University of Edinburgh, Strangeness Photoproduction A2 Analysis meeting, Mainz, September 2008

3. =
T C Jude, The University of Edinburgh, Strangeness Photoproduction A2 Analysis meeting, Mainz, September 2008

4. = = 5 million simulated events: gp g K+ L K+ Out K+ In
T C Jude, The University of Edinburgh, Strangeness Photoproduction A2 Analysis meeting, Mainz, September 2008

5. T C Jude, The University of Edinburgh, Strangeness Photoproduction A2 Analysis meeting, Mainz, September 2008

6. Total energy deposited in the Crystal Ball:
Large energy sum on the trigger:
(July 07 data)
Reduced data?
Simulation
Expt
K+ detection (simulation)
330 MeV energy sum in CB
100 MeV energy sum in CB
Cut imposed on data for efficiency measurements
q (lab frame) [deg]
T C Jude, The University of Edinburgh, Strangeness Photoproduction A2 Analysis meeting, Mainz, September 2008