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Hi Urs, just (again) a few thoughts and remarks concerning this topic: The maple code from Seven does not take into account the correlation between Lambda_bar and lambda_1 which could be large. In oder to obtain the correlation you just can take the famous Lambda_bar vs. lambda_1 plot from CLEO (don't take the one from DELPHI for obvious reasons :-) and estimate the correlation from there. Once you have the correlation you can use the code from Seven as starting base - I did this already for the exclusive B->sg measurement when they needed Lambda_bar striped down by one order for the BSG Neubert model. It worked. Concerning the numbers of the QCD parameters Lambda_bar and lambda_1 (or Lambda_bar and a in your case) I strongly suggest to use the measurement from CLEO as input. If I am not mistaken this numbers where used for the inclusive Vcb value for ICHEP02. I do not see any good reason not to use this procedure also for the Vub measurement. Any other choice of numbers will have to be justified and might face quite a bit of criticism from the outside (non-BABAR) physics community. Oliver On Fri, 14 Feb 2003, Urs Langenegger wrote: > > Hoi, > > in general, the reference of choice is El Kahdra and Luke: > hep-ph/0208114 > > And now I remember that we discussed this already once before. > > http://babar-hn.slac.stanford.edu:5090/HyperNews/get/ISLDecays/222.html > > The only caveat here is that I am not sure whether the correlation > between lambda1 and lbar is taken into account. We should check it, of > course. > > You can also get the writeup of the CKM workshop either in hardcopy in > my office or from your (Italian) friends (PaoloG, AchilleS, MarcoB). I > am not sure whether it is out already. > > Cheers, > --U. > >