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Hi all, I've finished running against cocktail and generic producing fit to the mes distributions for both cases. All the information is avaiable at: http://www.slac.stanford.edu/~asarti/recoil/sys/Newtheor_sys1202.html (very top of the page) Plots on generic have been obtained with a cut on int pur (asking intpur > .2). In both cases the mes fits make sense (for sure the generic ones are worse ..) and I don't think that we can have big effects from there. The weights calculated on generic and cocktail are linked just above the table containing mes plots. You can see that while the Bch ones are in very good agreement the B0 ones seems to have a tiny sys shift toward lower values (generic vs cocktail). This can be easily explained by the fact that we are calculating an overall scaling factor on b0+b+ and not making a breakdown in b0 and b+ separately. So the shift toward lower values will vanish as soon as we apply different scaling factor for B0 and B+. I think that B+ is were we're testing the true behavior of different ways of calculations and here you see that the effect is only statistical (weights are going up and down...) I've launched a test fit with weights calculated on generic without corrections for B0/B+ :: All B 0.0191972 +- 0.00247088(stat) +- 0.00101902(MC stat) B+ 0.0166294 +- 0.00300812(stat) +- 0.00141978(MC stat) B0 0.0232981 +- 0.00399662(stat) +- 0.00150782(MC stat) The variation is ALL on B0 side (B+ moves < 1.5%) the variation with respect to default value is:: 2.5% .. I think that the test on B+ is enough to ensure us that we're doing the rights thing. The effect switching from cocktail to generic is really statistics, but maybe we can think about having a calculation on B) and B+ separately for that given scaling factor. Let me know any othe comment-question- test you'd like to see. alessio ______________________________________________________ Alessio Sarti Universita' & I.N.F.N. Ferrara tel +39-0532-974328 Ferrara roma +39-06-49914338 SLAC +001-650-926-2972 "... e a un Dio 'fatti il culo' non credere mai..." (F. De Andre') "He was turning over in his mind an intresting new concept in Thau-dimensional physics which unified time, space, magnetism, gravity and, for some reason, broccoli". (T. Pratchett: "Pyramids")