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Vub measurement using recoil of fully reconstructed Bs

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Subject:
From:
Chukwudi Kweku Clarke <[log in to unmask]>
Date:
14 Jun 2006 19:06:18 -0700 (PDT)Wed, 14 Jun 2006 19:06:18 -0700 (PDT)
Content-Type:
TEXT/PLAIN
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TEXT/PLAIN (269 lines)
For the point discussed below In short the fitter failed.
The mES plots for data seem to look as expected, i.e., zero contributions
in all bins from flavours 4 and 5 and peaking BG, argus and signal
components look good for flavour 3 (Charged Bs).
There is a problem (also present when the points for mm2 scans look good)
arises from the mES*Vxbn.eps (x=c or u and n=3,4 or5). Looking at the
bins for these mES fits, we have some bins with (without) peaking BG, some
with (without) argus present. Looking at thwe fit results one sees very
large errors for the data points.
Look at the vubfit.out file or see below.
------------------------------------------------------


fitWithError
 PARAMETER DEFINITIONS:
    NO.   NAME         VALUE      STEP SIZE      LIMITS
     1 vubincomp    1.00000e+00  1.00000e-03    0.00000e+00  1.00000e+01
     2 vcbothcomp   1.00000e+00  1.00000e-03    0.00000e+00  1.00000e+01
     3 vuboutcomp   1.00000e+00  1.00000e-03    0.00000e+00  1.00000e+01
     4 flag        -2.00000e+00  constant
     4 flag        -3.00000e+00  constant
 **********
 **    1 **FIX           3
 **********
 **********
 **    2 **FIX           4
 **********
 PARAMETER    4  IS CONSTANT.   IGNORED.
 **********
 **    3 **MINI       1e+04       0.001
 **********
 FIRST CALL TO USER FUNCTION AT NEW START POINT, WITH IFLAG=4.
 START MIGRAD MINIMIZATION.  STRATEGY  1.  CONVERGENCE WHEN EDM .LT.
1.00e-06
 FCN=47.4522 FROM MIGRAD    STATUS=INITIATE       48 CALLS          49
TOTAL
                     EDM= unknown      STRATEGY= 1      NO ERROR MATRIX
  EXT PARAMETER               CURRENT GUESS       STEP         FIRST
  NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE
   1  vubincomp    1.53569e-01   1.00000e-03  -3.95017e-01  -8.75693e+01
   2  vcbothcomp   1.34260e-01   1.00000e-03   0.00000e+00  -9.27163e+02
   3  vuboutcomp   1.00000e+00     fixed
   4  flag        -3.00000e+00   constant
 MIGRAD MINIMIZATION HAS CONVERGED.
 MIGRAD WILL VERIFY CONVERGENCE AND ERROR MATRIX.
 COVARIANCE MATRIX CALCULATED SUCCESSFULLY
 FCN=28.3576 FROM MIGRAD    STATUS=CONVERGED      97 CALLS          98
TOTAL
                     EDM=1.26959e-08    STRATEGY= 1      ERROR MATRIX
ACCURATE
  EXT PARAMETER                                   STEP         FIRST
  NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE
   1  vubincomp    6.55896e-02   4.30860e-02   1.02883e-04   1.33421e-03
   2  vcbothcomp   1.92242e-01   1.46093e-02   2.05107e-05  -9.57320e-03
   3  vuboutcomp   1.00000e+00     fixed
   4  flag        -3.00000e+00   constant
 EXTERNAL ERROR MATRIX.    NDIM=  25    NPAR=  2    ERR DEF=1
  1.858e-03 -4.313e-04
 -4.313e-04  2.134e-04
 PARAMETER  CORRELATION COEFFICIENTS
       NO.  GLOBAL      1      2
        1  0.68489   1.000 -0.685
        2  0.68489  -0.685  1.000
 **********
 **    4 **MINOS       1e+04       0.001
 **********
 FCN=28.3576 FROM MINOS     STATUS=SUCCESSFUL     60 CALLS         158
TOTAL
                     EDM=1.26959e-08    STRATEGY= 1      ERROR MATRIX
ACCURATE
  EXT PARAMETER                  PARABOLIC         MINOS ERRORS
  NO.   NAME      VALUE            ERROR      NEGATIVE      POSITIVE
   1  vubincomp    6.55896e-02   4.30860e-02  -4.40159e-02   4.23512e-02
   2  vcbothcomp   1.92242e-01   1.46093e-02  -1.43296e-02   1.49194e-02
   3  vuboutcomp   1.00000e+00     fixed
   4  flag        -3.00000e+00   constant
 PARAMETER DEFINITIONS:
    NO.   NAME         VALUE      STEP SIZE      LIMITS
     4 flag         2.00000e+00  constant
     4 flag         3.00000e+00  constant
 **********
 **    5 **FIX           3
 **********
 PARAMETER    3  ALREADY FIXED. IGNORED.
 **********
 **    6 **FIX           4
 **********
 PARAMETER    4  IS CONSTANT.   IGNORED.
 **********
 **    7 **MINI       1e+04       0.001
 **********
 FIRST CALL TO USER FUNCTION AT NEW START POINT, WITH IFLAG=4.
 START MIGRAD MINIMIZATION.  STRATEGY  1.  CONVERGENCE WHEN EDM .LT.
1.00e-06
 FCN=0 FROM MIGRAD    STATUS=INITIATE       61 CALLS         220 TOTAL
                     EDM= unknown      STRATEGY= 1      NO ERROR MATRIX
  EXT PARAMETER               CURRENT GUESS       STEP         FIRST
  NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE
   1  vubincomp            nan   4.30860e-02   0.00000e+00   0.00000e+00
   2  vcbothcomp           nan   1.46093e-02   0.00000e+00   0.00000e+00
   3  vuboutcomp   1.00000e+00     fixed
   4  flag         3.00000e+00   constant
 MIGRAD MINIMIZATION HAS CONVERGED.
 MIGRAD WILL VERIFY CONVERGENCE AND ERROR MATRIX.
 MINUIT WARNING IN HESSE
 ============== Second derivative zero for parameter1
  MNHESS FAILS AND WILL RETURN DIAGONAL MATRIX.
 FCN=0 FROM HESSE     STATUS=FAILED         11 CALLS         231 TOTAL
                     EDM=0    STRATEGY= 1  ERROR MATRIX UNCERTAINTY 100.0
per cent
  EXT PARAMETER                APPROXIMATE        STEP         FIRST
  NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE
   1  vubincomp            nan           nan   0.00000e+00   0.00000e+00
   2  vcbothcomp           nan           nan   0.00000e+00   0.00000e+00
   3  vuboutcomp   1.00000e+00     fixed
   4  flag         3.00000e+00   constant
 MIGRAD MINIMIZATION HAS CONVERGED.
 MIGRAD WILL VERIFY CONVERGENCE AND ERROR MATRIX.
 MINUIT WARNING IN HESSE
 ============== Second derivative zero for parameter1
  MNHESS FAILS AND WILL RETURN DIAGONAL MATRIX.
 FCN=0 FROM MIGRAD    STATUS=CONVERGED      83 CALLS         242 TOTAL
                     EDM=0    STRATEGY= 1  ERROR MATRIX UNCERTAINTY 100.0
per cent
  EXT PARAMETER                APPROXIMATE        STEP         FIRST
  NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE
   1  vubincomp            nan           nan   0.00000e+00   0.00000e+00
   2  vcbothcomp           nan           nan   0.00000e+00   0.00000e+00
   3  vuboutcomp   1.00000e+00     fixed
   4  flag         3.00000e+00   constant
 EXTERNAL ERROR MATRIX.    NDIM=  25    NPAR=  2    ERR DEF=1
        nan        nan
        nan        nan
ERR MATRIX APPROXIMATE
 PARAMETER  CORRELATION COEFFICIENTS
       NO.  GLOBAL      1      2
        1  0.00000   1.000  0.000
        2  0.00000   0.000  1.000
 ERR MATRIX APPROXIMATE
 **********
 **    8 **MINOS       1e+04       0.001
 **********
 MINUIT WARNING IN HESSE
 ============== Second derivative zero for parameter1
  MNHESS FAILS AND WILL RETURN DIAGONAL MATRIX.
 MINUIT WARNING IN MNCROS
 ============== Cannot find slope of the right sign
                         POSITIVE MINOS ERROR NOT CALCULATED FOR PARAMETER
1
 MINUIT WARNING IN MNCROS
 ============== Cannot find slope of the right sign
                         NEGATIVE MINOS ERROR NOT CALCULATED FOR PARAMETER
1
 MINUIT WARNING IN MNCROS
 ============== Cannot find slope of the right sign
                         POSITIVE MINOS ERROR NOT CALCULATED FOR PARAMETER
2
 MINUIT WARNING IN MNCROS
 ============== Cannot find slope of the right sign
                         NEGATIVE MINOS ERROR NOT CALCULATED FOR PARAMETER
2
 FCN=0 FROM MINOS     STATUS=FAILURE       156 CALLS         409 TOTAL
                     EDM=0    STRATEGY= 1  ERROR MATRIX UNCERTAINTY 100.0
per cent
  EXT PARAMETER                  PARABOLIC         MINOS ERRORS
  NO.   NAME      VALUE            ERROR      NEGATIVE      POSITIVE
   1  vubincomp            nan           nan
   2  vcbothcomp           nan           nan
   3  vuboutcomp   1.00000e+00     fixed
   4  flag         3.00000e+00   constant
Make scan plots
Info in <TCanvas::Print>: eps file
/u/br/clarke1/scra/IbuppR14mm2d2ch-065/ppR14mm2d2ch-065vubin_scan.eps has
been created
Info in <TCanvas::Print>: eps file
/u/br/clarke1/scra/IbuppR14mm2d2ch-065/ppR14mm2d2ch-065vcboth_scan.eps has
been created
Info in <TCanvas::Print>: eps file
/u/br/clarke1/scra/IbuppR14mm2d2ch-065/ppR14mm2d2ch-065vubout_scan.eps has
been created

Doing now the chi2 fit

CHISQ CALCULATION:: 1.35159e+243 1.36621e+161 8.70623e+252
Break of chi2 chop contrib:: 0.291722 0 797.442
Break of chi2 chop contrib:: -1.22235 1 1921.97
Break of chi2 chop contrib:: 1.13429 2 423.731
Break of chi2 chop contrib:: 1.49038 3 94.7063
Break of chi2 chop contrib:: 29.4633 4 0.00161483
Break of chi2 chop contrib:: -1.10929 5 8.17576
Break of chi2 chop contrib:: -1.29868 6 2.98222
 Chi Square / NDoF of the Fit :175.218


------------------------------------------------------
C.C.

---------- Forwarded message ----------
Date: Wed, 14 Jun 2006 14:59:32 -0700 (PDT)
From: Chukwudi Kweku Clarke <[log in to unmask]>
To: Heiko Lacker <[log in to unmask]>
Cc: [log in to unmask]
Subject: Re: mm2 scans

Hi Heiko. I look at the point (your 2nd question) you were talking about
and looking at the corresponding results.dat file
(ppR14mm2d2ch-065results.dat) I saw that there is no error for Vub in
fitted 1' bin. This (I think) results in the partial BRBR having on error
also. I will look at the mES fits for this and for your first question.
Cheers, C.C.

On Wed, 14 Jun 2006, Heiko Lacker wrote:

> Hi Chukwudi,
>
> 1. The charged B's for mX look strange.
>    Here, it would be worthwhile to understand in more detail if the large
>    point-to-point instabilities for larger mm^2 cuts are pointing to mES
>    fit problems. Could you have please a closer look?
>
> 2. I have also doubts about the size of the error bars in the diff plots.
>    If you compare for example for charged B's in the Pplus analysis for
>    selection D the difference between the point at 1 GeV^2 with 0.5 GeV^2
>    I would expect an error bar of +-0.0018.
>    The error bar plotted is much smaller than that. This looks a bit odd.
>
> Cheers,
> Heiko
>
> On Tue, 13 Jun 2006, Chukwudi Kweku Clarke wrote:
>
> > Hi gang, you may find links to all the mm2 scans on my mm2 webpage;
> > http://www.slac.stanford.edu/~clarke1/protected/clarke1/web/mm2web.html
> > . The names and addresses of the webpages below have changed so please
> > use the above link.
> > Cheers, C.C.
> >
> > On Sun, 11 Jun 2006, CHUKWUDI KWEKU CLARKE wrote:
> >
> > > Hi all, you may find the mm2 scans using binned mES fits below.
> > >
> > > http://www.slac.stanford.edu/~clarke1/protected/clarke1/mywebpage1.html
> > > (mixed Bs 1D analysis).
> > > http://www.slac.stanford.edu/~clarke1/protected/clarke1/mywebpageCh1.html
> > > (Charged Bs 1D analysis).
> > > http://www.slac.stanford.edu/~clarke1/protected/clarke1/mywebpageNu1.html
> > > (Neutral Bs 1D analysis).
> > >
> > > http://www.slac.stanford.edu/~clarke1/protected/clarke1/mywebpage2.html
> > > (mixed Bs 2D analysis).
> > > http://www.slac.stanford.edu/~clarke1/protected/clarke1/mywebpageCh2.html
> > > (Charged Bs 2D analysis).
> > > http://www.slac.stanford.edu/~clarke1/protected/clarke1/mywebpageNu2.html
> > > (Neutral Bs 2D analysis).
> > >
> > > http://www.slac.stanford.edu/~clarke1/protected/clarke1/mywebpage3.html
> > > (mixed Bs Pplus analysis).
> > > http://www.slac.stanford.edu/~clarke1/protected/clarke1/mywebpageCh3.html
> > > (Charged Bs Pplus analysis).
> > > http://www.slac.stanford.edu/~clarke1/protected/clarke1/mywebpageNu3.html
> > > (Neutral Bs Pplus analysis).
> > >
> > > C.C.
> > >
> >
>



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