Difference: MassFitting (7 vs. 8)

Revision 82010-09-21 - LarsEklund

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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.

Changed:
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Event mix: Bd -> π π, Bd -> K π

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

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

>
>

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
Changed:
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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

>
>

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
Changed:
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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
Bd->K+K- 15
12 15.03 0.14 0.21+/-0.03 0.99+/-0.03
Bd->K+π- 5.56 5 5.56 0.10 0.01+/-0.04 1.02+/-0.03
Bd->K-π+ 2.44 5 2.43 0.07 -0.11+/-0.03 0.98+/-0.03
Combinatoric 32 35 35.02


>
>

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.

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