One thing we know is that the dang is a function of p with a strong bend at lower p in any given acceptance, therefore the mean value witl depend on the spectral shape within a setting and you should not expects this to be the same. E.g. for a lower field setting you will ten to populate more of the momentum part, an we know that at the largest p the dang approaches the correct value of 0. so the fact the 4 deg low field has the lowest value is consistent with this notion. The first point of course also means it is not a gaussian response, and with a small sigma-cut you may loose tracks at the high and low end of the spectrum. You should check the normal y used cut values runs through the 2 plot of p-dang to see how much bias is introduced. flemming ---------------------------------------------------------------- Flemming Videbaek Physics Department Brookhaven National Laboratory e-mail: videbaek@bnl.gov phone: 631-344-4106 ----- Original Message ----- From: "Djamel Ouerdane" <ouerdane@nbi.dk> To: "Brahms Devel List" <brahms-dev-l@lists.bnl.gov> Sent: Tuesday, June 08, 2004 7:32 AM Subject: [Brahms-dev-l] dAng evolution in FFS > Hi, > > While inspecting the 63 GeV data at the global tracking level, I found > this of a certain interest : > > http://www.nbi.dk/~ouerdane/dangVsRun.gif > http://www.nbi.dk/~ouerdane/dangVsRun.eps > > Djam > > > -- > Djamel Ouerdane ------------------------------------------o > | Niels Bohr Institute | Home: | > | Blegdamsvej 17, DK-2100 Ø | Jagtvej 141 2D, | > | Fax: +45 35 32 50 16 | DK-2200 Copenhagen N | > | Tel: +45 35 32 52 69 | +45 35 86 19 74 | > | http://www.nbi.dk/~ouerdane | > | ouerdane@nbi.dk | > o---------------------------------------------------------o > > > _______________________________________________ > Brahms-dev-l mailing list > Brahms-dev-l@lists.bnl.gov > http://lists.bnl.gov/mailman/listinfo/brahms-dev-l > _______________________________________________ Brahms-dev-l mailing list Brahms-dev-l@lists.bnl.gov http://lists.bnl.gov/mailman/listinfo/brahms-dev-lReceived on Tue Jun 8 07:58:51 2004
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