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Renata Kopecná 2022-02-04 16:04:19 +01:00
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Home.md

@ -11,6 +11,83 @@ The Tables of Content were created by [gh-md-toc](https://github.com/ekalinin/gi
## Q2 binning
### In the selection
The range of the Q2 is defined in Utils.hpp for the [Jpsi region](https://git.physi.uni-heidelberg.de/kopecna/EWP-BplusToKstMuMu-AngAna/wiki/MassFit.cpp#tmefficiencyclass) and the [rare regions](https://git.physi.uni-heidelberg.de/kopecna/EWP-BplusToKstMuMu-AngAna/wiki/Utils.hpp#string-getmumucut).
**The Jpsi Q2 region is 8.68-10.09 GeV\^2**
**The rare Q2 region is 0-0.98, 1.1-8.0, 11.0 - 12.5, 15.0-20 Gev\^2**
The rare region is dived so to remove the contribution of the phi, Jpsi and psi2s resonances.
The binning in Q2 is defined in [TMefficiency class](https://git.physi.uni-heidelberg.de/kopecna/EWP-BplusToKstMuMu-AngAna/wiki/MassFit.cpp#tmefficiencyclass) for the selection part, the name tag is `q2_binned_fit`. The name of the class was chosen when testing how different variables behave under truth matching. Since the class was generally useful, it became the default.
They are set to be divided into five rare bins:
* 0.1 - 4.0 GeV\^2 with the exclusion of 0.98-1.1 GeV\^2 (phi resonance)
* 4.0 - 8.0 GeV\^2
* 11.0 - 12.5 GeV\^2
* 15.0 - 20.0 GeV\^2
### In the fit
The ranges are defined in [[constant.cc|FCNC-fitter-constants]]. Different binning options are defined there in the functions `get_TheQ2binsmin(int nBins, bool Reference)` and `get_TheQ2binsmax(int nBins, bool Reference)`. The typically used bins are
* Jpsi
* 8.68-10.09 GeV\^2
* Rare
* 0.25 - 4.0 GeV\^2 with the exclusion of 0.98-1.1 GeV\^2 (phi resonance)
* 4.0 - 8.0 GeV\^2
* 11.0 - 12.5 GeV\^2
* 15.0 - 18.0 GeV\^2
* 1.1 - 6.0 GeV\^2 (extra wide bin very much below J/psi, useful for theorists)
When running the fit, the default number of bins is -1, hence the number of desired bins has to be set by using the parameter `-nBins <int>`!
## Available Monte Carlo samples
### Signal Monte Carlo
### Reference Monte Carlo
Decay number: [](http://lhcbdoc.web.cern.ch/lhcbdoc/decfiles/releases/v30r70/options/.py)
Available years: 2011, 2012, 2015, 2016
The Reference MC was generated with the K*+ phase-space decay (ie the K+ and pi0 were generated flat in the angles)! Therefore, the MC cannot be used
### Phase-space Monte Carlo
Decay number: [](http://lhcbdoc.web.cern.ch/lhcbdoc/decfiles/releases/v30r70/options/.py)
Available years: 2011, 2012, 2015, 2016
### Bacgrkound Monte Carlo
**B0->K\*mumu**
Decay number: [11114001](http://lhcbdoc.web.cern.ch/lhcbdoc/decfiles/releases/v30r70/options/11114001.py)
Available years: 2011, 2012, 2015, 2016
**B0->K\*Jpsi**
Decay number: [11144001](http://lhcbdoc.web.cern.ch/lhcbdoc/decfiles/releases/v30r70/options/11144001.py)
Available years: 2011, 2012, 2015, 2016
**B+->K1Jpsi**
Decay number: [12145101](http://lhcbdoc.web.cern.ch/lhcbdoc/decfiles/releases/v30r70/options/12435001.py)
Available years: 2011, 2012, 2015, 2016
**B+->XJpsi**
Decay number: [12442001](http://lhcbdoc.web.cern.ch/lhcbdoc/decfiles/releases/v30r70/options/12442001.py)
Available years: 2011, 2012, 2016
### Test subsection
[Selection code](https://git.physi.uni-heidelberg.de/kopecna/EWP-BplusToKstMuMu-AngAna/wiki/Selection-code)