2_analysis_1110021010.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
 
"""
<header>
  <input>../1110021010.dst.root</input>
  <output>1110021010_Validation.root</output>
  <contact>sam.cunliffe@desy.de</contact>
</header>
"""
# Runs a simple analysis on signal [B0 -> rho0 gamma] events. Saves historams
# in a format for the validation server. There are better example analysis
# scripts in analysis/examples and analysis/examples/tutorials.
 
DECAY_MODE_ID = 1110021010
INPUT_FILENAME = "../%i.dst.root" % DECAY_MODE_ID
OUTPUT_FILENAME = "%i_Validation.root" % DECAY_MODE_ID
 
import basf2
from modularAnalysis import inputMdst, reconstructDecay, matchMCTruth
from stdPhotons import stdPhotons
from stdCharged import stdPi
from validation_tools.metadata import create_validation_histograms
from variables import variables as vm  # shorthand for the variable manager instance
 
main = basf2.Path()
inputMdst('default', INPUT_FILENAME, path=main)
 
stdPi('loose', path=main)
stdPhotons('loose', path=main)
 
reconstructDecay('rho0:pipi -> pi+:loose pi-:loose', '0.35 < M < 1.2', path=main)
matchMCTruth('rho0:pipi', path=main)
 
reconstructDecay('B0 -> rho0:pipi gamma:loose', '4.8 < M < 5.8', path=main)
matchMCTruth('B0', path=main)
 
create_validation_histograms(
    main, OUTPUT_FILENAME, "B0",
    variables_1d=[
        (
            "Mbc", 180, 5.2, 5.29,
            r"$B^0\to\rho^0\gamma$ candidates' beam-constrained mass",
            "Sam Cunliffe <sam.cunliffe@desy.de>",
            r"The beam-constrained mass distribution of $B^0\to\rho^0\gamma$ decays",
            "Distribution should be peaking at the nominal $B^0$ mass. Tail towards low mass."
            "M_{bc} [GeV/c^{2}]", "Candidates",
        ),
        (
            "useRestFrame(daughter(1, E))", 50, 1.5, 4.0,
            r"The photon energy distribution for $B^0\to\rho^0\gamma$ decays",
            "Sam Cunliffe <sam.cunliffe@desy.de>; Torben Ferber <torben.ferber@desy.de>",
            "Sharp distribution at 2.5 GeV. Look for differences in "
            "the abslute scale. This could be an indication of a loss of photon efficiency.",
            "E_{\gamma} [GeV]", "Candidates",
        ),
    ]
)
 
basf2.process(main)
print(basf2.statistics)