Hi all,
these are the numbers for the new calculation of the pstar factor.
I used:
- all the available MC (cocktail+vubcocktail+generic+vubgeneric)
- a loose cut on the purity (intpur>.2, quite similar to the analysis
one)
- exactly the same cuts of the selection of the semileptonic events (to
get Nsl) and mixing correction
I did it both for electrons and muons, since the efficiency vs pstar
convoluted with different spectra can produce different
ratios of efficiencies.
Here the numbers
e+mu
----
pcms > 1.0 PSTAR FACTOR = 1.1271 +- 0.0106366
pcms > 1.1 PSTAR FACTOR = 1.1591 +- 0.0115223
pcms > 1.2 PSTAR FACTOR = 1.21073 +- 0.0126872
pcms > 1.3 PSTAR FACTOR = 1.27754 +- 0.0142094
pcms > 1.4 PSTAR FACTOR = 1.37362 +- 0.0162895
pcms > 1.5 PSTAR FACTOR = 1.50655 +- 0.0191914
pcms > 1.6 PSTAR FACTOR = 1.68092 +- 0.023273
pcms > 1.7 PSTAR FACTOR = 1.93272 +- 0.0294956
pcms > 1.8 PSTAR FACTOR = 2.3702 +- 0.0401761
pcms > 1.9 PSTAR FACTOR = 3.13499 +- 0.0599656
pcms > 2.0 PSTAR FACTOR = 4.69766 +- 0.104218
ele
---
pcms > 1.0 PSTAR FACTOR = 1.11579 +- 0.0163298
pcms > 1.1 PSTAR FACTOR = 1.14532 +- 0.0175532
pcms > 1.2 PSTAR FACTOR = 1.20296 +- 0.0192487
pcms > 1.3 PSTAR FACTOR = 1.27156 +- 0.0214447
pcms > 1.4 PSTAR FACTOR = 1.3718 +- 0.0244644
pcms > 1.5 PSTAR FACTOR = 1.50515 +- 0.0286845
pcms > 1.6 PSTAR FACTOR = 1.68578 +- 0.0345991
pcms > 1.7 PSTAR FACTOR = 1.94961 +- 0.0436818
pcms > 1.8 PSTAR FACTOR = 2.39972 +- 0.0593268
pcms > 1.9 PSTAR FACTOR = 3.2157 +- 0.0890321
pcms > 2.0 PSTAR FACTOR = 4.8212 +- 0.153699
mu
--
pcms > 1.0 PSTAR FACTOR = 1.14345 +- 0.0207069
pcms > 1.1 PSTAR FACTOR = 1.17861 +- 0.0218576
pcms > 1.2 PSTAR FACTOR = 1.22121 +- 0.0233736
pcms > 1.3 PSTAR FACTOR = 1.28554 +- 0.0254447
pcms > 1.4 PSTAR FACTOR = 1.37616 +- 0.0283582
pcms > 1.5 PSTAR FACTOR = 1.50935 +- 0.0324935
pcms > 1.6 PSTAR FACTOR = 1.67632 +- 0.038304
pcms > 1.7 PSTAR FACTOR = 1.91484 +- 0.0471119
pcms > 1.8 PSTAR FACTOR = 2.33777 +- 0.0624082
pcms > 1.9 PSTAR FACTOR = 3.05161 +- 0.0900003
pcms > 2.0 PSTAR FACTOR = 4.57164 +- 0.153355
These are the slopes:
ele+mu:
http://www.slac.stanford.edu/~daniele/vub/psf_2.ps
ele:
http://www.slac.stanford.edu/~daniele/vub/psf_0.eps
mu:
http://www.slac.stanford.edu/~daniele/vub/psf_1.eps
I checked also which is the result using generic MC only with the same
purity cut:
pcms > 1 PSTAR FACTOR = 1.15463 +- 0.0184315
pcms > 1.1 PSTAR FACTOR = 1.18811 +- 0.0199061
pcms > 1.2 PSTAR FACTOR = 1.24495 +- 0.0218892
pcms > 1.3 PSTAR FACTOR = 1.30573 +- 0.0243927
pcms > 1.4 PSTAR FACTOR = 1.40049 +- 0.0277886
pcms > 1.5 PSTAR FACTOR = 1.5291 +- 0.0327194
pcms > 1.6 PSTAR FACTOR = 1.70505 +- 0.0395539
pcms > 1.7 PSTAR FACTOR = 1.94847 +- 0.0497028
pcms > 1.8 PSTAR FACTOR = 2.40148 +- 0.0677054
pcms > 1.9 PSTAR FACTOR = 3.15595 +- 0.100252
pcms > 2 PSTAR FACTOR = 4.62101 +- 0.169268
The results are compatible within the stat error. In principle the number
on the genric can be affected by sist effects due to low purity fits.
Our new pstarfactors will be:
tot:
pcms > 1.0 PSTAR FACTOR = 1.1271 +- 0.0106366
ele:
pcms > 1.0 PSTAR FACTOR = 1.11579 +- 0.0163298
mu:
pcms > 1.0 PSTAR FACTOR = 1.14345 +- 0.0207069
I updated the code to use these factors dependent on the lepton type.
Daniele
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