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Add six new files for various X -> DDbar

Vanya Belyaev requested to merge ibelyaev/my-changes into master

Add six new dec-files

  • 28196041 X3840_D+D-=TightCut.dec
  • 28194041 X3840_D0D0bar=TightCut.dec
  • 28196051 chic22P_D+D-=TightCut.dec
  • 28194051 chic22P_D0D0bar=TightCut.dec
  • 28196052 psi3770_D+D-=TightCut.dec
  • 28194052 psi3770_D0D0bar=TightCut.dec

More details:

28196041 : Decay of new narrow X(3840) into D+D- final state

  • X(3840) is generated as chi_c1(1P) with modified mass/width
  • tight cuts for the D+ mesons and all final state stable particles are applied
  • two very nice tricks by Michael Wilkinson @mwilkins are used:
    • only charmonium production is activated for Pythia8
    • D+ lifetime cut is applied via EvtGenDecayWithCutTool
  • CPU performance is ~2seconds/event (804 seconds/400 events)
  • integrated efficiency for generator-level cuts is (4.07+-0.28)% as reported in GeneratorLog.xml
  • efficiency for D+ lifetime cuts is (61.81+-0.53)% (must be 62.81% == exp(-75um/311.78um)**2)
  • efficiency for generator-level cuts is ( 7.78+-0.37)%

28194041: Decay of new narrow X(3840) state into D0D~0 final state

  • X(3840) is generated as chi_c1(1P) with moodified mass/width
  • tight cuts for the D0 mesons and all final state stable particles are applied
  • two very nice tricks by Michael Wilkinson @mwilkins are used:
    • only charmonium production is activated for Pythia8
    • D0 lifetime cut is applied via EvtGenDecayWithCutTool
  • CPU performance is <1second/event (274 seconds/400 events)
  • integrated efficiency for generator-level cuts is (8.36+-0.05)% as reported in GeneratorLog.xml
  • efficiency for D0 lifetime cuts is (29.47+-0.05)% (must be 29.52% == exp(-75um/122.94um)**2)
  • efficiency for generator-level cuts is (16.67+-0.07)%

28196051: Decay of chi_c2(2P) state into D+D- final state

  • chi_c2(2P) is generated as chi_c2(1P) with modified mass/width from PDG:
    • mass is 3.927+-0.026 MeV
    • width is 24 MeV
  • tight cuts for the D+ mesons and all final state stable particles are applied
  • two very nice tricks by Michael Wilkinson @mwilkins are used:
    • only charmonium production is activated for Pythia8
    • D+ lifetime cut is applied via EvtGenDecayWithCutTool
  • CPU performance is <1.5seconds/event (544 seconds/400 events)
  • integrated efficiency for generator-level cuts is (2.64+-0.19)% as reported in GeneratorLog.xml
  • efficiency for D+ lifetime cuts is (61.45+-0.46)% (must be 62.81% == exp(-75um/311.78um)**2)
  • efficiency for generator-level cuts is ( 5.80+-0.28)%

28194051: Decay of chi_c2(2P) state into D0D~0 final state

  • chi_c2(2P) is generated as chi_c2(1P) with modified mass/width from PDG:
    • mass is 3.927+-0.026 MeV
    • width is 24 MeV
  • tight cuts for the D0 mesons and all final state stable particles are applied
  • two very nice tricks by Michael Wilkinson @mwilkins are used:
    • only charmonium production is activated for Pythia8
    • D0 lifetime cut is applied via EvtGenDecayWithCutTool
  • CPU performance is <2seconds/event (53533 seconds/50k events)
  • integrated efficiency for generator-level cuts is (6.74+-0.46)% as reported in GeneratorLog.xml
  • efficiency for D+ lifetime cuts is (29.50+-0.45)% (must be 29.52% == exp(-75um/122.94um)**2)
  • efficiency for generator-level cuts is (13.28+-0.62)%

28196052: Decay of psi(3770) state into D+D- final state

  • since production of psi(3770) in pythia is extremely slow process, psi(3770) is generated as chi_c2(1P) (it speedups the process with a factor close to 100) with mass/width from PDG.
    • mass is 3.773+-0.35 MeV
    • width is 27.2+-1.0 MeV
  • tight cuts for the D+ mesons and all final state stable particles are applied
  • two very nice tricks by Michael Wilkinson @mwilkins are used:
    • only charmonium production is activated for Pythia8
    • D+ lifetime cut is applied via EvtGenDecayWithCutTool
  • CPU performance is <1.5seconds/event (538 seconds/400 events)
  • integrated efficiency for generator-level cuts is (2.79+-0.19)% as reported in GeneratorLog.xml
  • efficiency for D+ lifetime cuts is (61.59+-0.45)% (must be 62.81% == exp(-75um/311.78um)**2)
  • efficiency for generator-level cuts is ( 5.60+-0.27)%

28194052: Decay of psi(3770) state into D0D~0 final state

  • since production of psi(3770) in pythia is extremely slow process, psi(3770) is generated as chi_c2(1P) (it speedups the process with a factor close to 100) with mass/width from PDG.
    • mass is 3.773+-0.35 MeV
    • width is 27.2+-1.0 MeV
  • tight cuts for the D0 mesons and all final state stable particles are applied
  • two very nice tricks by Michael Wilkinson @mwilkins are used:
    • only charmonium production is activated for Pythia8
    • D0 lifetime cut is applied via EvtGenDecayWithCutTool
  • CPU performance is <1second/event (260 seconds/400 events)
  • integrated efficiency for generator-level cuts is (6.38+-0.45)% as reported in GeneratorLog.xml
  • efficiency for D+ lifetime cuts is (29.52+-0.45)% (must be 29.52% == exp(-75um/122.94um)**2)
  • efficiency for generator-level cuts is (13.44+-0.63)%

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