Difference: MassFitting (5 vs. 6)

Revision 62010-09-21 - LarsEklund

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G-Fact Mass Fitting

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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

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

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
Bd->K+K-	21	25	21.04	0.14	0.27+/-0.03	1.00+/-0.03
Combinatoric	35	35	35.02

Paul's study with the signal fraction fitting

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

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Validation of signal fraction fitter (Lars)

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