Date: Fri, 26 Oct 2007 14:59:21 -0400
Hi Atle, I think I understand most of the difference for the propotns at high rapidity. Attached is the proton spectra from my analysis in two cases i.e. with and w/o CC vertex (normalized properly with == 0.82 ) w/o using the 12 mb .The ratio is plotted. This follows for pt>0.8 pretty much what you showed, so the analysis seems to agree pretty well here. I do not know what happens below 0.7 in the ratio you showed today. I do not that the spectrum you have in figure 7.5 in the msc thesis is chopped off at ~ 0.8. I my analysis it goes to ~ 1.0 as I would expect when the mmentum carried away from the leading proton is small and one will get a good CC vertex. This ratio is not really the same for different particles. The low rapidity point I believe is mainly due to the different MRS eff that was used. I placed 'updated' spectra files in results/final for the MRS which now uses a 'constant' 0.9 eff for MRS, and a smaller fiducial cut in TPM1 to move away from the edges where eff does fall. Could you take a look at the the pions and prot at y=0 again ? regards 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 https://lists.bnl.gov/mailman/listinfo/brahms-dev-l
