Belle II Software  release-05-01-25
treeFit_referenced_tree_with_neutral_custom_origin.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_DstD0Kpipi0_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.fillParticleList('gamma:a', 'E > 0.08', path=main)
32  ma.reconstructDecay('pi0:a -> gamma:a gamma:a', '0.125 < InvM < 0.145', 0, path=main)
33 
34  ma.reconstructDecay('D0:rec -> K-:a pi+:a pi0:a', '', 0, path=main)
35  ma.reconstructDecay('D*+:rec -> D0:rec pi+:a', '', 0, path=main)
36  ma.reconstructDecay('B0:rec -> D*+:rec pi-:a', ' InvM > 5', 0, path=main)
37  ma.matchMCTruth('B0:rec', path=main)
38 
39  conf = 0
40  main.add_module('TreeFitter',
41  particleList='B0:rec',
42  confidenceLevel=conf,
43  massConstraintList=[],
44  massConstraintListParticlename=[],
45  expertUseReferencing=True,
46  ipConstraint=False,
47  updateAllDaughters=False,
48  customOriginConstraint=True,
49  # just to test this doesnt crash
50  customOriginVertex=[0, 0, 0],
51  customOriginCovariance=[1, 0, 0, 0, 1, 0, 0, 0, 1]
52  )
53 
54  ntupler = basf2.register_module('VariablesToNtuple')
55  ntupler.param('fileName', testFile.name)
56  ntupler.param('variables', ['chiProb', 'M', 'isSignal'])
57  ntupler.param('particleList', 'B0:rec')
58  main.add_module(ntupler)
59 
60  basf2.process(main)
61 
62  ntuplefile = TFile(testFile.name)
63  ntuple = ntuplefile.Get('ntuple')
64 
65  self.assertFalse(ntuple.GetEntries() == 0, "Ntuple is empty.")
66 
67  allBkg = ntuple.GetEntries("isSignal == 0")
68  allSig = ntuple.GetEntries("isSignal > 0")
69 
70  truePositives = ntuple.GetEntries("(chiProb > 0) && (isSignal > 0)")
71  falsePositives = ntuple.GetEntries("(chiProb > 0) && (isSignal == 0)")
72 
73  mustBeZero = ntuple.GetEntries("(chiProb < {})".format(conf))
74 
75  print("True fit survivors: {0} out of {1} true candidates".format(truePositives, allSig))
76  print("False fit survivors: {0} out of {1} false candidates".format(falsePositives, allBkg))
77 
78  self.assertFalse(truePositives == 0, "No signal survived the fit.")
79 
80  self.assertTrue(falsePositives < 3032, f"Too many false positives: {falsePositives} out of {allBkg} total bkg events.")
81 
82  self.assertTrue(truePositives > 64, "Signal rejection too high")
83  self.assertFalse(mustBeZero, "We should have dropped all candidates with confidence level less than {}.".format(conf))
84 
85  print("Test passed, cleaning up.")
86 
87 
88 if __name__ == '__main__':
89  unittest.main()
treeFit_referenced_tree_with_neutral_custom_origin.TestTreeFits
Definition: treeFit_referenced_tree_with_neutral_custom_origin.py:14
basf2.process
def process(path, max_event=0)
Definition: __init__.py:25
treeFit_referenced_tree_with_neutral_custom_origin.TestTreeFits.testFit
def testFit(self)
Definition: treeFit_referenced_tree_with_neutral_custom_origin.py:17
b2test_utils.require_file
def require_file(filename, data_type="", py_case=None)
Definition: __init__.py:47