[G12] Summary of cross section status

[Dennis Weygand]

I would like to briefly summarize our state as of yesterday's meeting:
Regarding flux/gflux: there was a small correction using the new gflux method that Johann developed. This is of order 10%
This will not fix our problem, which is of order a factor of 4 or so.
No error has been found in the study of Mukesh: he looked at rho production above (in photon energy) our 2-prong trigger, where the cross section and b-slope for the rho is well known. 
So now it is back in the lap of Mike Kunkel. He again has to summarize the results of his study on the Production trigger vs Single Prong (low current) runs for p pi+ pi- exclusive events in the photon energy trigger region taking in account the revised gflux numbers from Johann.

Again I think we should take p pi+ pi- exclusive events in the high-energy rho region from the data and put those events into the monte carlo that both Mukesh and Mike K. are using to reaffirm that those events are being reconstructed with high probability.

Dennis


--
Dennis Weygand
weygand at jlab.org
(757) 269-5926 (office)
(757) 870-4844 (cell)




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