I spend some time over the weekend, looking in more details. I will come back later to the details but the following plot shows the bottom line i) there are position/angle dependent efficiencies in tpm1, tpm2 (thanks to kris this could be evaluated) ii) The charged hadrons are assumed to be pions i.e. decay/absorption/chisq/target cut is included using the standard. stuff iii) The spectrum is evaluated not requiring CC but just with a MRS track, and normalized from 12->36 mb, since the overall norm still comes from the trigger 5 distributions. iv) tracks must point to tofslat 40-110 v) pion acceptance are assumed. http://www4.rcf.bnl.gov/~videbaek/analysis/IsrComparison.png shows the cross sections, and the curves are the parametrization of the +/- h of the Z.Phys reference for ISR data. I also read several of the ISR references, and it seems to me they in general apply the absorption decay corrections, so this should be done when we compare. There could still be issues in this analysis, but overall it looks pretty good - thus I think we can figure out how to deal with the pp reference spectra for hadron analysis.. Flemming -------------------------------------------- Flemming Videbaek Physics Department Bldg 510-D Brookhaven National Laboratory Upton, NY11973 phone: 631-344-4106 cell: 631-681-1596 fax: 631-344-1334 e-mail: videbaek @ bnl gov _______________________________________________ Brahms-dev-l mailing list Brahms-dev-l_at_lists.bnl.gov http://lists.bnl.gov/mailman/listinfo/brahms-dev-lReceived on Mon Nov 13 2006 - 18:26:50 EST
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