Difference: AsymmetryFitting (7 vs. 8)

Revision 82010-08-23 - AlisonBates

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META TOPICPARENT	name="WebHome"

B2hh GFact Asymmetry Fitting page

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Toy data was generated with a mix of 56.1% Bd → π π, 10.3% Bd → K π and 33.6% combinatoric background with ssb of 0.664 (ssb is S/S+B) generated in a mass region of 5-5.8 GeV. The mistag rates in generation and fitting was ωBs = 0.361and ωBd = 0.355 and ACPBd→Kπ = 0.1. 100 data sets with 100,000 events per data set was used here but Lars ran with 1000 data sets with 100k events per set and found no bias on the pulls and much improved uncertainties. I just show the plots below (100 data sets) for completion.

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Adir Bd - input was 0.38 and fitted was 0. ± 0. ( A^dir_Bd)
Amix Bd - input was 0.61 and fitted was 0. ± 0. ( A^mix_Bd)

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Adir Bd - input was 0.38 and fitted was 0.3814 ± 0.0043 ( A^dir_Bd)
Amix Bd - input was 0.61 and fitted was 0.6089 ± 0.0026 ( A^mix_Bd)

Next I generated a data sample with the following composition (calculating for our mass range...) and simultaneously fitted for the Bd2pipi asymmetries and the Bs2KK asymmetries (for now there is still no proper time description in the fitting pdf but there is Gaussian smear on the data generation). Note the mistag rates will change for simultaneous fitting to ωBs = 0.347and ωBd = 0.370.

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META FILEATTACHMENT	attachment="AdirBs2KKCBwithsmearing.gif" attr="" comment="" date="1281353541" name="AdirBs2KKCBwithsmearing.gif" path="AdirBs2KKCBwithsmearing.gif" size="14349" stream="AdirBs2KKCBwithsmearing.gif" tmpFilename="/usr/tmp/CGItemp24470" user="AlisonBates" version="1"
META FILEATTACHMENT	attachment="justbdandcbnarrowmassAdir.gif" attr="" comment="" date="1282042955" name="justbdandcbnarrowmassAdir.gif" path="justbdandcbnarrowmassAdir.gif" size="16256" stream="justbdandcbnarrowmassAdir.gif" tmpFilename="/usr/tmp/CGItemp24363" user="AlisonBates" version="3"
META FILEATTACHMENT	attachment="justbdandcbnarrowmassAmix.gif" attr="" comment="" date="1282042963" name="justbdandcbnarrowmassAmix.gif" path="justbdandcbnarrowmassAmix.gif" size="15927" stream="justbdandcbnarrowmassAmix.gif" tmpFilename="/usr/tmp/CGItemp24188" user="AlisonBates" version="3"

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META FILEATTACHMENT	attachment="B2pipiB2KpiCBAdirnew.gif" attr="" comment="" date="1282552940" name="B2pipiB2KpiCBAdirnew.gif" path="B2pipiB2KpiCBAdirnew.gif" size="15497" stream="B2pipiB2KpiCBAdirnew.gif" tmpFilename="/usr/tmp/CGItemp26948" user="AlisonBates" version="1"
META FILEATTACHMENT	attachment="B2pipiB2KpiCBAmixnew.gif" attr="" comment="" date="1282552948" name="B2pipiB2KpiCBAmixnew.gif" path="B2pipiB2KpiCBAmixnew.gif" size="15308" stream="B2pipiB2KpiCBAmixnew.gif" tmpFilename="/usr/tmp/CGItemp26845" user="AlisonBates" version="1"

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