test7_treeFitterFitResolution_Fit.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
 
 
 
"""
<header>
  <output>../TreeFitted_B0ToJPsiKs.root</output>
  <contact>Jo-Frederik Krohn; jkrohn@student.unimelb.edu.au</contact>
  <interval>nightly</interval>
</header>
"""
 
# Reconstruct B0 to J/PsiKs using the TreeFitter. Use the ..._Plot.py
# to plot the resolutions.
 
from basf2 import create_path, process, statistics, set_random_seed
 
from modularAnalysis import inputMdst, reconstructDecay, fillParticleList, matchMCTruth
import os
from vertex import treeFit
 
import sys
 
path = create_path()
set_random_seed('#BAADF00D')
 
if 'BELLE2_VALIDATION_DATA_DIR' not in os.environ:
    sys.exit(0)
inputFile = os.path.join(os.environ['BELLE2_VALIDATION_DATA_DIR'], 'analysis/prerel04_eph3_BGx1_b2jpsiks.root')
inputMdst('default', inputFile, path=path)
 
 
fillParticleList('pi+:all', '', path=path)
fillParticleList('mu+:all', '', path=path)
 
reconstructDecay('K_S0:pipi -> pi+:all pi-:all', 'dM<0.25', path=path)
reconstructDecay('J/psi:mumu -> mu+:all mu-:all', 'dM<0.11', path=path)
reconstructDecay('B0:jpsiks -> J/psi:mumu K_S0:pipi', 'Mbc > 5.27 and abs(deltaE)<0.2', path=path)
 
matchMCTruth('B0:jpsiks', path=path)
 
treeFit(
    list_name='B0:jpsiks',
    conf_level=-1,
    updateAllDaughters=True,
    path=path,
)
 
variables = [
    'isSignal',  # B0
    'M',
    'InvM',
    'chiProb',
 
    'p',
    'mcP',
    'pErr',
    'E',
    'mcE',
    'E_uncertainty',
 
    'x',
    'y',
    'z',
    'x_uncertainty',
    'y_uncertainty',
    'z_uncertainty',
    'mcDecayVertexX',
    'mcDecayVertexY',
    'mcDecayVertexZ',
]
 
path.add_module('VariablesToNtuple',
                treeName='B0TreeFit',
                particleList='B0:jpsiks',
                variables=variables,
                fileName='../TreeFitted_B0ToJPsiKs.root')
 
process(path)
 
print(statistics)