Intro

This is a collection of tools and classes for the Bs⁰ → DsK/Dsπ analysis.

Studies:

1. Bs⁰ time acceptance
2. Bs⁰ and bachelor particle opening angle as PID
3. Develop a multi-variate selection for Bs⁰ using TMVA.

Classes

Tree reader:

• Inherits from purely virtual readTree
• readDataTree reads data ntuples
• readMCTree reads Monte Carlo ntuples
• lifetime reads Monte Carlo ntuples for lifetime acceptance studies
• There are several overloaded readTree::Loop() methods for different types of output.

Opening angle:

• oangle implements a DLL like PID variable using the D-meson and bachelor opening angle.

Utilities

• accept.cc: an utility to select events using the lifetime tree reader for lifetime acceptance studies
• resolution.cc: make residual and pull plots from Monte Carlo
• ltFit.py: fit for the trigger lifetime acceptance function

TMVA

The tmva/ directory has a whole sleuth of scripts to train and apply MVA classifiers, and to make corresponding plots. For some of the plotting, it uses the rplot library. It also uses numpy here and there.