1. Study of the required DIRC resolution
Based on the PID TAG report
Toy MC simulation (no particle tracking, all the detector responses are parametrized) using macros from Klaus G.
Basic DIRC parameters (assuming the simple geometry):
SPR = 18 mrad (10 – in PID TAG report)
Photodetector efficiency = 8.8 % (7.5%)
Tracking resolution = 1 mrad (0 mrad)
N photons is parametrized (λ1 = 290nm, λ2 = 580nm):
P = 3 GeV/c,
Photon yield used for PID TAG report (λ1 = 280nm, λ2 = 330nm)
Most crutial region
P = 3 GeV/c,
blue line – PandaRoot,
red – parametrization

2. Barrel DIRC parametrized signal
Assuming gaussian signals, the DIRC output: Θ c and σ for each particle type, momentum, polar angle,
σ2 = (SPR/sqrt(N γ)) + σ corr 2
Θ c (p, type, naverage)
Approaches:
1. cut is defined by the separation power (as in PID TAG report)
2. the efficiency of K id is fixed to 95%, thus the cut is defined

3. Separation power/mis-id maps (as in PID TAG)

4. Mis-id maps (eff = 95%)
Mis-id map for PID TAG approach to compare:

5. Efficiency maps (mis-id = 1%)
Efficiency map for PID TAG approach to compare:

6. Calculation of mis-id for some channels
#Lambda^{0}#bar{#Lambda}^{0} llbar DPM dpm 1.460
#phi#phi 2phi 2#pi^{+}2#pi^{-} 4pi 1.500
#phi#phi 2phi 3#pi^{+}3#pi^{-} 6pi 1.500
#Lambda^{0}#bar{#Lambda}^{0} llbar #Sigma^{0}#bar{#Sigma}^{0} 2sigma 1.914
#Lambda^{0}#bar{#Lambda}^{0} llbar #Sigma^{0}#bar{#Sigma}^{0} 2sigma 3.101
#Omega^{-}#bar{#Omega}^{+} omom DPM dpm 4.954
J/#psi2#pi^{0} jpsi2pi0 #pi^{+}#pi^{-}2#pi^{0} 2pi2pi
J/#psi#pi^{+}#pi^{-} jpsi2pi 2#pi^{+}2#pi^{-} 4pi 5.609
#phi#phi 2phi 2#pi^{+}2#pi^{-} 4pi 6.000
#phi#phi 2phi 3#pi^{+}3#pi^{-} 6pi 6.000
#Lambda^{0}#bar{#Lambda}^{0} llbar #Sigma^{0}#bar{#Sigma}^{0} 2sigma 6.000
J/#psi#eta jpsieta 3#pi^{+}3#pi^{-} 6pi 6.080
J/#psi#eta jpsieta 2#pi^{+}2#pi^{-} 4pi 6.080
J/#psi2#pi^{0} jpsi2pi0 #pi^{+}#pi^{-}2#pi^{0} 2pi2pi
J/#psi#pi^{+}#pi^{-} jpsi2pi 2#pi^{+}2#pi^{-} 4pi 6.232
D^{0}#bar{D}^{0}#gamma 2d0gam DPM dpm 6.488
D^{+}D^{-}#gamma 2dpm DPM dpm 6.488
J/#psi#pi^{+}#pi^{-} jpsi2pi 2#pi^{+}2#pi^{-} 4pi 6.988
J/#psi#eta jpsieta 3#pi^{+}3#pi^{-} 6pi 6.990
J/#psi#eta jpsieta 2#pi^{+}2#pi^{-}#pi^{0} 4pipi
J/#psi#eta jpsieta 2#pi^{+}2#pi^{-} 4pi 6.990
D_{s}^{+}D_{s}^{-}#gamma 2dspmgam DPM dpm 7.314
D*^{+}D*^{-}#gamma 2dstpmgam DPM dpm 7.746
D*^{0}#bar{D}*^{0}#gamma 2dst0gam DPM dpm 7.746
D_{s}^{+}D_{s}^{-}#gamma 2dspmgam DPM dpm 7.746
#Lambda^{0}#bar{#Lambda}^{0} llbar DPM dpm 8.000
D*^{0}#bar{D}*^{0}#gamma 2dst0gam DPM dpm 8.000
D^{+}D^{-}#gamma 2dpm DPM dpm 8.000
D^{0}#bar{D}^{0}#gamma 2d0gam DPM dpm 8.000
D_{s}^{+}D_{s}^{-}#gamma 2dspmgam DPM dpm 8.000
D*^{+}D*^{-}#gamma 2dstpmgam DPM dpm 8.000
J/#psi#pi^{+}#pi^{-} jpsi2pi 2#pi^{+}2#pi^{-} 4pi 8.682
D_{s}^{+}D_{s}^{-}#gamma 2dspmgam DPM dpm
64 channels were taken into account for PID TAG report,
Instead of punching out the bkg
1. overlay the signal (in p,theta coord) with the mis-id map
2. calculate the average mis-id by averaging over all signal bins located on the color map.

7. Mis-id for some channels (as in PID TAG report)
Maximal mis-id
Mis-id for some channels (as in PID TAG report)
15 channels out of 60 have mis-id>0.5% and >50 particles in the signal plot (out of ev)

8. Mis-id for some channels (eff=95%)
Maximal mis-id
Mis-id for some channels (eff=95%)
13 channels out of 60 have mis-id>0.5% and >50 particles in the signal plot (out of ev)