Spring 2017 Analysis Launch Cuts

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Revision as of 01:50, 28 July 2017 by Pmatt (Talk | contribs) (Timing Cuts)

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PreSelect Cuts

  • For a given DChargedTrack, at least one hypothesis must have a hit in either: BCAL/FCAL/TOF/SC.
  • For a given DNeutralShower, it must at least have a shower energy of 100 MeV/c.
  • For neutral showers in the BCAL, they must have hits in at least 2 cells.

Mass Cuts

  • Note that if there are no particles missing, there is also a cut on the missing energy: -3.0 < Missing Energy (GeV) < 3.0
  • Detected Particles
PID Invariant Mass (GeV/c2) Missing Mass2 (GeV/c2)2
None NA -0.1 < MM2 < 0.1
γ NA -0.1 < MM2 < 0.1
e+ NA None
e- NA None
π- None -1.0 < MM2 < 1.0
π+ None -1.0 < MM2 < 1.0
K+ None None
K- None None
p NA -0.5 < MM2 < 4.41
NA -0.5 < MM2 < 4.41
n None -0.5 < MM2 < 4.41



  • Decaying Mesons
PID Invariant Mass (GeV/c2) Missing Mass2 (GeV/c2)2
π0 0.08 < IM < 0.19 -1.0 < MM2 < 1.0
KS 0.3 < IM < 0.7 None
η 0.4 < IM < 0.7 None
η' 0.6 < IM < 1.3 None
φ 0.8 < IM < 1.2 None
D0 1.8 < IM < 1.92 None
J/ψ None None



  • Decaying Baryons
PID Invariant Mass (GeV/c2) Missing Mass2 (GeV/c2)2
Λ 1.0 < IM < 1.2 None
Σ0 1.1 < IM < 1.3 None
Σ+ 1.1 < IM < 1.3 None
Σ- 1.1 < IM < 1.3 None
Ξ0 1.1 < IM < 1.5 None
Ξ- 1.1 < IM < 1.5 None
Ω- None None
Λc 2.0 < IM < 2.6 None


Timing Cuts

PID BCAL/RF Δt (ns) TOF/RF Δt (ns) FCAL/RF Δt (ns) SC/RF Δt (ns)
γ ±1.5 ±2.5
e+ dE/dx < 5.5 dE/dx < 3.5 None None E/p > 0.67 E/p > 0.7
e- dE/dx < 5.5 dE/dx < 3.5 None None E/p > 0.67 E/p > 0.7
π+ dE/dx < e^(-6.0*p + 2.80149) + 2.55 None None None None None
π- dE/dx < e^(-6.0*p + 2.80149) + 2.55 None None None None None
K+ dE/dx < e^(-6.0*p + 2.80149) + 2.55 None None None None None
K- dE/dx < e^(-6.0*p + 2.80149) + 2.55 None None None None None
p dE/dx > e^(-3.93024*p + 3.0) + 1.0 None None None None None
dE/dx > e^(-3.93024*p + 3.0) + 1.0 None None None None None


Track Energy Cuts

PID CDC dE/dx (keV/cm) FDC dE/dx (keV/cm) SC dE/dx (MeV/cm) TOF dE/dx (MeV/cm) BCAL Shower_E/Track_p (c) FCAL Shower_E/Track_p (c)
p dE/dx > e^(-3.93024*p + 3.0) + 1.0 None None None None None
dE/dx > e^(-3.93024*p + 3.0) + 1.0 None None None None None
π+ dE/dx < e^(-6.0*p + 2.80149) + 2.55 None None None None None
π- dE/dx < e^(-6.0*p + 2.80149) + 2.55 None None None None None
K+ dE/dx < e^(-6.0*p + 2.80149) + 2.55 None None None None None
K- dE/dx < e^(-6.0*p + 2.80149) + 2.55 None None None None None
e+ dE/dx < 5.5 dE/dx < 3.5 None None E/p > 0.67 E/p > 0.7
e- dE/dx < 5.5 dE/dx < 3.5 None None E/p > 0.67 E/p > 0.7


Kinematic Fit

  • If a kinematic fit has been performed, it must have converged.