MC FF Re-weighting                                                                        Kenji Hamano

Last modified : Jun 18, 2007                                              Back to Home Back to privious page
Document from EvtGen
guide.ps
Code from EvtGenModels
EvtGenModels/EvtGoityRoberts.cc
EvtGenModels/EvtHQET2FF.cc
EvtGenModels/EvtISGW2FF.cc


R16b skims Run2 was used.

Tihghter Kaon Selection is applied.
D prob > 0.001 and B prob > 0.01 applied
|cosTheta_{Dl-nonDl}| < 0.92 applied


Weights

Form Factor and weight distribution plots for D and D*
B->Dlnu (rho_D^2 = 1.17 (HFAG))B->D*lnu
ISGW2 FFHQET, old R1, R2, rho^2
HQET FFHQET, new R1, R2, rho^2
RN = 1.36301RN = 1.04412
weightweight


Comparison of dfferential decay rates as functions of w.
differential decay rateDlnu dGdwdifferential decay rateD*lnu dGdw
Branching Fraction ISGW20.0311973Branching Fraction ISGW2n/a
BF HQET old slope = 0.80.0239236BF HQET SP5/SP60.0570195
BF HQET new alope = 1.17 (HFAG)0.0228877BF HQET slope=1.179, R1=1.417, R2=0.8360.0546053


Comparison of J(w) part.
differential decay rateDlnu FFD*lnu FF




Form Factor and weight distribution plots for D**
B->D0*lnuB->D1'lnuB->D1lnuB->D2*lnu
ISGW2 FFISGW2 FFISGW2 FFISGW2 FF
HQET FFHQET FFHQET FFHQET FF
RN = 0.162471RN = 0.548861RN = 0.733062RN = 0.749073
weightweightweightweight


Comparison of dfferential decay rates as functions of w.
differential decay rateD0star dGdwD1' dGdwD1 dGdwD2star dGdw
Branching Fraction ISGW20.0007033870.0008954480.004416570.00234673
BF LLSW Approximation A0.002868090.001678450.005974380.00237221
BF LLSW Approximation B10.004331180.001635220.006047220.00314166
BF LLSW Approximation B20.003736530.002208230.005904350.00397941


Comparison of J(w) part
B->D0*lnuB->D1'lnuB->D1lnuB->D2*lnu
D0star FFD1' FFD1 FFD2star FF



Effect of FF re-weighting

Befoer correction 1.D** newFF (LLSW B1) 1. + 2.D* newFF 1. + 2. + 3.D new FF (slope = 1.4)
L momentum L momentum L momentum L momentum
D momentum D momentum D momentum D momentum
cosBY cosBY cosBY cosBY
D momentum (bin by bin, D0) D momentum (bin by bin, D0) D momentum (bin by bin, D0) D momentum (bin by bin, D0)
D momentum (bin by bin, D+) D momentum (bin by bin, D+) D momentum (bin by bin, D+) D momentum (bin by bin, D+)


D plots
D new FF (HQET) slope=1.4 D ISGW2(black) vs HQET(colored histograms)
L momentum L momentum
D momentum D momentum
cosBY cosBY



D* plots
D* new FF parameters D* old parameters(black) vs new parameters(colored histograms)
L momentum L momentum
D momentum D momentum
cosBY cosBY

Note that D momentum is not D* momentum.


D** New plots without bug
D** theta dependent D** 4 components 1 D** 4 components 2 D** ISGW2(black) vs LLSW(colored histograms)
L momentum L momentum L momentum L momentum
D momentum D momentum D momentum D momentum
cosBY cosBY cosBY cosBY

Note that D momentum is not D** momentum.

D** Old plots with bug
D** theta dependent D** 4 components 1 D** 4 components 2
L momentum L momentum L momentum
D momentum D momentum D momentum
cosBY cosBY cosBY