RooMisID

A RooFit package for fitting misidentified backgrounds

###Contains the following classes

• RooMisIDGaussian
  Main class for a probability density function (PDF) for invariant mass for a decay with one particle misidentified, based on a gaussian mass resolution where the mean depedends on the kinematical variable called "momentum fraction"
• RooMomentumFractionPdf
  Class for PDF for the momentum fraction, in its core a sum of exponentials with a 3rd order spline (polynomial) at its start (low x).
• RooMisIDBkg Class for PDF for invariant mass for a decay with one particle misidentified, without resolution. Suggestion is to use it with your own resolution pdf and apply a FFT convolution (RooFFTConvPdf).
• RooInverseGaussian
  Class for an inverse Gaussian PDF
• RooPowerLawApproxVar
  Class used in RooMisIDGaussian and RooMomentumFractionPDF to approximate a power law with exponentials

###Build instructions

1. make a folder to build in (recommended):

cd <directory_where_package_lives>/RooMisID

mkdir build

cd build  

2. use cmake to set up environment and build here (ensure you have cmake!):

cmake ../src

make  

3. the library lives in:

<directory_where_package_lives>/RooMisID/build/libRooMisID.so