Hi,
FCN=0.734914 FROM HESSE STATUS=OK 16 CALLS 390 TOTAL
EDM=3.30701e-10 STRATEGY= 1 ERROR MATRIX
ACCURATE
EXT PARAMETER INTERNAL INTERNAL
NO. NAME VALUE ERROR STEP SIZE VALUE
1 Constant 9.88148e+00 1.31716e+02 2.62898e-05 9.88148e+00
2 Mean -2.20089e+00 4.22920e+01 4.45609e-06 -2.20089e+00
3 Sigma 2.69156e+00 6.38356e+00 6.24446e-07 -4.67726e-01
No surprise: the mean value is negative.
Probably, one needs to restrict this parameter to the range [1,3].
If you loose too much time with this fit and the evaluation of the
systematic error on BRBR please concentrate on the rest of the talk
first and let's see if it can be included later on.
Cheers,
Heiko
On Wed, 13 Sep 2006, Antonio Petrella wrote:
> Hi,
> here is the output...
>
> Antonio
>
>
> Heiko Lacker ha scritto:
> > Hi Antionio,
> >
> > the errors are definitely too huge. Something must be wrong.
> >
> > Could you please post also the fit parameters and their errors?
> >
> > Heiko
> >
> > On Wed, 13 Sep 2006, Antonio Petrella wrote:
> >
> >> Ok, let's try this gaussian
> >>
> >> I get the following table...(errors are so huge: is it normal?)
> >>
> >>
> >> #mx_l mx_h corr err_corr
> >> 0.00 1.55 1.821 +- 0.577
> >> 1.55 1.90 3.411 +- 95.487
> >> 1.90 2.20 2.839 +- 96.872
> >> 2.20 2.50 2.366 +- 100.470
> >> 2.50 2.80 1.948 +- 106.299
> >> 2.80 3.10 1.583 +- 114.362
> >> 3.10 3.40 1.271 +- 124.660
> >> 3.40 3.70 1.008 +- 137.194
> >> 3.70 4.20 0.726 +- 157.384
> >> 4.20 5.00 0.406 +- 198.663
> >>
> >> Antonio
> >>
> >> Heiko Lacker ha scritto:
> >>> 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
> >>>>
>
