Fake phi combination

fake_phi.py

phi_combination = CombineParticles(
    'CombineCheatedphiToKK',
    Preambulo=truth_matching_preambulo,
    # There's no "anti-phi", so no [...]cc
    DecayDescriptors=['phi(1020) -> K- K+'],
    Inputs=[
        kaons
    ],
    # The D_s+ MC sample models the resonant phase space but doesn't insert
    # actual resonant particles, so there isn't a real phi
    DaughtersCuts={
        'K+': "mcMatch('([D_s+ ==> ^K- ^K+ pi+]CC)')"
    },
    CombinationCut='AALL',
    MotherCut='ALL'
)
ds_combination = CombineParticles(
    'CombineCheatedDsTophipi',
    Preambulo=truth_matching_preambulo,
    DecayDescriptors=['[D_s+ -> phi(1020) pi+]cc'],
    Inputs=[
        pions,
        'Phys/{0}'.format(phi_combination.getName())
    ],
    DaughtersCuts={
        'pi+': "mcMatch('([D_s+ ==> K- K+ ^pi+]CC)')"
    },
    CombinationCut='AALL',
    MotherCut="mcMatch('([D_s+ ==> K- K+ pi+]CC)')"
)
ds_cheated = ds.clone('Cheated{0}'.format(ds.getName()))
ds_cheated.Inputs = ['Phys/{0}'.format(ds_combination.getName())]