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G-Fact Mass Fitting

Validation of signal fraction fitter (Lars)

To validate the signal fraction fitter (aka mass fitter) a series of data sets were generated with different mixes of signals and combinatoric background were generated. Each data set has approximately 1000 toy data sets with 100k events each. All data sets are located in /data/lhcb01/eklund/B2hhToyData/, in sub-directories as given below.

Event mix: Bd -> π π, Bd -> K π and combinatoric background

Directory: BdMix _561pipi_103Kpi/, 1000 data sets, 100k events each


True S.F. Initial value Mean [%]
Sigma [%]
Pull mean Pull sigma
Bd->π+π- 56.1 55 56.12 0.19 0.11+/-0.03 1.00+/-0.02
Bd->K+π- 5.665 5 5.657 0.084 -0.12+/-0.03 1.03+/-0.02
Bd->K-π+ 4.635 5 4.619 0.078 -0.21+/-0.03 0.99+/-0.02
Combinatoric 33.6 35 33.60

Event mix: Bd -> π π, Bd -> K π, Bs -> K K and combinatoric background

Directory: Mix_Bd2pipiKpiNBs2KK/ , 940 data sets, 100k events each


True S.F. Initial value Mean [%]
Sigma [%]
Pull mean Pull sigma
Bd->π+π- 24
20 23.99 0.18 -0.04+/-0.03 1.01+/-0.03
Bd->K+π- 11
10 10.98 0.11 -0.16+/-0.03 1.01+/-0.02
Bd->K-π+ 9 10 8.98 0.11 -0.21+/-0.04 1.05+/-0.03
Bs->K+K- 21
25 21.04 0.14 0.27+/-0.03 1.00+/-0.03
Combinatoric 35 35 35.02

Event mix: Bd -> π π, Bd -> K π, Bs -> K K, Bs -> K π and combinatoric background

Directory: Mix_BdNBs2pipiKpiKK/ , 860 data sets, 100k events each


True S.F. Initial value Mean [%]
Sigma [%]
Pull mean Pull sigma
Bd->π+π- 20
23 19.98 0.17 -0.12+/-0.03 0.98+/-0.03
Bd->K+π- 13.75
12 13.75 0.14 -0.01+/-0.03 0.99+/-0.02
Bd->K-π+ 11.25 12 11.24 0.13 -0.08+/-0.03 0.97+/-0.03
Bs->K+K- 15
12 15.03 0.14 0.21+/-0.03 0.99+/-0.03
Bs->K+π- 5.56 5 5.56 0.10 0.01+/-0.04 1.02+/-0.03
Bs->K-π+ 2.44 5 2.43 0.07 -0.11+/-0.03 0.98+/-0.03
Combinatoric 32 35 35.02


Event mix: Bd -> π π, Bd -> K π, Bs -> K K, Bs -> K π, Bd -> π π π and combinatoric background

Directory: fullMFMixAug2010/ , 1000 data sets, 100k events each


True S.F. Initial value Mean [%]
Sigma [%]
Pull mean Pull sigma
Bd->π+π- 8.47
10 8.45 0.13 -0.13+/-0.03 1.02+/-0.02
Bd->K+π- 17.82
15 17.84 0.14 0.12+/-0.03 0.99+/-0.03
Bd->K-π+ 14.58 15 14.58 0.13 -0.02+/-0.03 1.01+/-0.03
Bs->K+K- 8.47
10 8.47 0.10 0.01+/-0.03 1.02+/-0.03
Bs->K+π- 1.62 1 1.62 0.07 -0.03+/-0.04 0.96+/-0.03
Bs->K-π+ 0.72 1 0.71 0.05 -0.32+/-0.03 1.01+/-0.02
Bd->π+π-π0 15.0 10 14.98 0.16 -0.11+/-0.03 1.02+/-0.02
Combinatoric 33.32 38 35.02


Paul's study with the signal fraction fitting

Just start typing here paul....This is a link.

-- AlisonBates - 2010-08-06

Topic attachments
I Attachment History Action SizeSorted ascending Date Who Comment
GIFgif c1.gif r1 manage 7.7 K 2010-08-16 - 14:27 AlisonBates  
PNGpng mcEventRatios.png r1 manage 14.4 K 2010-08-10 - 08:14 LarsEklund  
PNGpng mcEventClasses.png r1 manage 20.1 K 2010-08-10 - 08:14 LarsEklund  
PNGpng Mix1_Bd2PiPi_pull.png r1 manage 20.2 K 2010-09-21 - 10:16 LarsEklund  
PNGpng Mix2_Bd2PiPi_pull.png r1 manage 20.3 K 2010-09-21 - 11:23 LarsEklund  
PNGpng Mix2_Bs2KK_pull.png r1 manage 20.9 K 2010-09-21 - 12:41 LarsEklund  
PNGpng Mix3_Bd2PiPi_pull.png r1 manage 21.1 K 2010-09-21 - 13:00 LarsEklund  
PNGpng Mix2_Bd2KminusPiplus_pull.png r1 manage 21.5 K 2010-09-21 - 11:23 LarsEklund  
PNGpng Mix3_Bd2KplusPiminus_pull.png r1 manage 21.5 K 2010-09-21 - 13:00 LarsEklund  
PNGpng Mix1_Bd2KminusPiplus_pull.png r1 manage 21.9 K 2010-09-21 - 10:16 LarsEklund  
PNGpng Mix3_Bd2KminusPiplus_pull.png r1 manage 21.9 K 2010-09-21 - 13:00 LarsEklund  
PNGpng Mix3_Bs2KplusPiminus_pull.png r1 manage 21.9 K 2010-09-21 - 13:01 LarsEklund  
PNGpng Mix2_Bd2KplusPiminus_pull.png r1 manage 22.1 K 2010-09-21 - 11:23 LarsEklund  
PNGpng Mix3_Bs2KK_pull.png r1 manage 22.2 K 2010-09-21 - 13:01 LarsEklund  
PNGpng Mix3_Bs2KminusPiplus_pull.png r1 manage 22.7 K 2010-09-21 - 13:01 LarsEklund  
PNGpng Mix4_Bd2KminusPiplus_pull.png r1 manage 22.8 K 2010-09-21 - 15:07 LarsEklund  
PNGpng Mix4_Bs2KminusPiplus_pull.png r1 manage 23.0 K 2010-09-21 - 15:07 LarsEklund  
PNGpng Mix4_Bs2KplusPiminus_pull.png r1 manage 23.0 K 2010-09-21 - 15:07 LarsEklund  
PNGpng Mix4_Bd2PiPiPi_pull.png r1 manage 23.1 K 2010-09-21 - 15:07 LarsEklund  
PNGpng Mix4_Bs2KK_pull.png r1 manage 23.3 K 2010-09-21 - 15:11 LarsEklund  
PNGpng Mix4_Bd2KplusPiminus_pull.png r1 manage 23.4 K 2010-09-21 - 15:07 LarsEklund  
PNGpng Mix1_Bd2KplusPiminus_pull.png r1 manage 23.7 K 2010-09-21 - 10:16 LarsEklund  
PNGpng Mix4_Bd2PiPi_pull.png r1 manage 23.8 K 2010-09-21 - 15:07 LarsEklund  
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Topic revision: r8 - 2010-09-21 - LarsEklund
 
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