Belle II Software  release-05-01-25
treeFit_referenced_charged_tree.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_DstD0Kpi_skimmed.root', 'validation', py_case=self)
26  ma.inputMdst('default', inputfile, path=main)
27 
28  ma.fillParticleList('pi+:a', 'pidProbabilityExpert(211, ALL) > 0.5', path=main)
29  ma.fillParticleList('K+:a', 'pidProbabilityExpert(321, ALL) > 0.5', path=main)
30 
31  ma.reconstructDecay('D0:rec -> K-:a pi+:a', '', 0, path=main)
32  ma.reconstructDecay('D*+:rec -> D0:rec pi+:a', '', 0, path=main)
33  ma.reconstructDecay('B0:rec -> D*+:rec pi-:a', ' InvM > 5', 0, path=main)
34  ma.matchMCTruth('B0:rec', path=main)
35 
36  conf = 0
37  main.add_module('TreeFitter',
38  particleList='B0:rec',
39  confidenceLevel=conf,
40  massConstraintList=[],
41  massConstraintListParticlename=[],
42  expertUseReferencing=True,
43  ipConstraint=False,
44  updateAllDaughters=False)
45 
46  ntupler = basf2.register_module('VariablesToNtuple')
47  ntupler.param('fileName', testFile.name)
48  ntupler.param('variables', ['chiProb', 'M', 'isSignal'])
49  ntupler.param('particleList', 'B0:rec')
50  main.add_module(ntupler)
51 
52  basf2.process(main)
53 
54  ntuplefile = TFile(testFile.name)
55  ntuple = ntuplefile.Get('ntuple')
56 
57  self.assertFalse(ntuple.GetEntries() == 0, "Ntuple is empty.")
58 
59  allBkg = ntuple.GetEntries("isSignal == 0")
60  allSig = ntuple.GetEntries("isSignal > 0")
61 
62  truePositives = ntuple.GetEntries("(chiProb > 0) && (isSignal > 0)")
63  falsePositives = ntuple.GetEntries("(chiProb > 0) && (isSignal == 0)")
64 
65  mustBeZero = ntuple.GetEntries("(chiProb < {})".format(conf))
66 
67  print("True fit survivors: {0} out of {1} true candidates".format(truePositives, allSig))
68  print("False fit survivors: {0} out of {1} false candidates".format(falsePositives, allBkg))
69 
70  self.assertFalse(truePositives == 0, "No signal survived the fit.")
71 
72  self.assertTrue(falsePositives < 1428, f"Background rejection {falsePositives} out of {allBkg}")
73 
74  self.assertTrue(truePositives > 151, f"Signal rejection too high {truePositives} out of {allSig}")
75  self.assertFalse(mustBeZero, "We should have dropped all candidates with confidence level less than {}.".format(conf))
76 
77  print("Test passed, cleaning up.")
78 
79 
80 if __name__ == '__main__':
81  unittest.main()
basf2.process
def process(path, max_event=0)
Definition: __init__.py:25
treeFit_referenced_charged_tree.TestTreeFits.testFit
def testFit(self)
Definition: treeFit_referenced_charged_tree.py:17
treeFit_referenced_charged_tree.TestTreeFits
Definition: treeFit_referenced_charged_tree.py:14
b2test_utils.require_file
def require_file(filename, data_type="", py_case=None)
Definition: __init__.py:47