tdcpv_variables.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
 
"""
a test of the TDCPV variables using the small test file for running quickly
"""
 
import b2test_utils
from basf2 import set_random_seed, create_path, process
 
# make logging more reproducible by replacing some strings
b2test_utils.configure_logging_for_tests()
set_random_seed("1337")
testinput = [b2test_utils.require_file('analysis/tests/mdst.root')]
 
fsps = ['mu-', 'pi-', 'gamma']
 
testpath = create_path()
testpath.add_module('RootInput', inputFileNames=testinput)
for fsp in fsps:
    # There is an annoying warning in ParticleLoader about zero charged tracks
    # If it will be removed in the future releases, the test log should be
    # updated respectively.
    testpath.add_module('ParticleLoader', decayStringsWithCuts=[(fsp, '')])
 
 
signal_list = 'J/psi'
# Find J/psi
testpath.add_module('ParticleCombiner', decayString=f'{signal_list} -> mu+ mu-',
                    cut='daughter(0, isSignal) > 0 and daughter(1, isSignal) > 0 '
                    ' and daughter(0, genMotherID) == daughter(1, genMotherID)')
# Signal vertex fit using kFit
testpath.add_module('ParticleVertexFitter', listName=signal_list,
                    confidenceLevel=0., vertexFitter='KFit')
 
testpath.add_module('ParticlePrinter', listName=signal_list, fullPrint=False)
# Build ROE
testpath.add_module('RestOfEventBuilder', particleList=signal_list,
                    particleListsInput=['pi+', 'gamma'])
# Tag vertex fit
testpath.add_module('TagVertex', listName=signal_list)
# Define ROE variables for testing
tdcpv_vars = ['DeltaT', 'DeltaTErr', 'DeltaTBelle', 'TagVz', 'TagVzErr']
# Print the variables to log
testpath.add_module('ParticlePrinter', listName=signal_list, fullPrint=False,
                    variables=tdcpv_vars)
process(testpath, 10)