Belle II Software  release-05-01-25
treeFit_referenced_single_vertex.py
1 #!/usr/bin/env python3
2 # -*- coding: utf-8 -*-
3 import unittest
4 import os
5 import tempfile
6 import basf2
7 import b2test_utils
8 import modularAnalysis as ma
9 from ROOT import Belle2
10 from ROOT import TFile
11 from ROOT import TNtuple
12 
13 
14 class TestTreeFits(unittest.TestCase):
15  """The unit test case for TreeFitter"""
16 
17  def testFit(self):
18  """Run the test fit"""
19 
20  testFile = tempfile.NamedTemporaryFile()
21 
22  main = basf2.create_path()
23 
24  inputfile = b2test_utils.require_file(
25  'analysis/1000_B_Jpsi_ks_pipi.root', 'validation', py_case=self)
26  ma.inputMdst('default', inputfile, path=main)
27 
28  ma.fillParticleList('mu+', 'pidProbabilityExpert(13, ALL) > 0.5', path=main)
29 
30  ma.reconstructDecay('J/psi:all -> mu+ mu-', '', 0, path=main)
31  ma.matchMCTruth('J/psi:all', path=main)
32 
33  conf = 0
34  main.add_module('TreeFitter',
35  particleList='J/psi:all',
36  confidenceLevel=conf,
37  massConstraintList=[],
38  massConstraintListParticlename=[],
39  expertUseReferencing=True,
40  ipConstraint=False,
41  updateAllDaughters=False)
42 
43  ntupler = basf2.register_module('VariablesToNtuple')
44  ntupler.param('fileName', testFile.name)
45  ntupler.param('variables', ['chiProb', 'M', 'isSignal'])
46  ntupler.param('particleList', 'J/psi:all')
47  main.add_module(ntupler)
48 
49  basf2.process(main)
50 
51  ntuplefile = TFile(testFile.name)
52  ntuple = ntuplefile.Get('ntuple')
53 
54  self.assertFalse(ntuple.GetEntries() == 0, "Ntuple is empty.")
55 
56  allBkg = ntuple.GetEntries("isSignal == 0")
57  allSig = ntuple.GetEntries("isSignal > 0")
58 
59  truePositives = ntuple.GetEntries("(chiProb > 0) && (isSignal > 0)")
60  falsePositives = ntuple.GetEntries("(chiProb > 0) && (isSignal == 0)")
61 
62  mustBeZero = ntuple.GetEntries("(chiProb < {})".format(conf))
63 
64  print("True fit survivors: {0} out of {1} true candidates".format(truePositives, allSig))
65  print("False fit survivors: {0} out of {1} false candidates".format(falsePositives, allBkg))
66 
67  self.assertFalse(truePositives == 0, "No signal survived the fit.")
68 
69  self.assertTrue(falsePositives < 1521, f"Too many false positives: {falsePositives} out of {allBkg} total bkg events.")
70 
71  self.assertTrue(truePositives > 741, "Signal rejection too high")
72 
73  self.assertFalse(mustBeZero, "We should have dropped all candidates with confidence level less than {}.".format(conf))
74 
75  print("Test passed, cleaning up.")
76 
77 
78 if __name__ == '__main__':
79  unittest.main()
treeFit_referenced_single_vertex.TestTreeFits.testFit
def testFit(self)
Definition: treeFit_referenced_single_vertex.py:17
basf2.process
def process(path, max_event=0)
Definition: __init__.py:25
treeFit_referenced_single_vertex.TestTreeFits
Definition: treeFit_referenced_single_vertex.py:14
b2test_utils.require_file
def require_file(filename, data_type="", py_case=None)
Definition: __init__.py:47