Hi Antonio,
maybe this is not too surprising after all since the first bin
contains the largest fraction of the signal.
Now, that I'm thinking of it: there is a fit function which
would avoid the problem of becoming negative, but which would
nevertheless give probably a reasonable fit to the correction
factors: a Gaussian.
Cheers,
Heiko
On Wed, 13 Sep 2006, Antonio Petrella wrote:
> Hi all,
>
> here are the results of the jobs with new correction factors strategy
> (i.e. fit with a first order polynomial starting from the second bin):
>
> PBRBR= (109 +- 10 +- 4) e^-4
> chi^2 of the mx fit = 25.12/7
>
> I also run the systematics and the value I get is
> sigma=22.5%
>
> These are the values that I should add to the talk, but are not
> encouraging...
>
> Antonio
>
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