D0 signal - Sti vs. StiCA PR - Run14 Au+Au 200 GeV
Events cuts:
- |Vz| < 6.0cm
- |Vz-VzVpd| < 3.0cm
kfVertex used here.
Tracking and PID cuts:
- nHitsFit > 20 && nHitsFit/nHitsPoss > 0.52
- at least one hit in every layer of PXL and IST.
- pT > 1.2 for kaons and pions
- |nSigmaPion| < 3.0
- |nSigmaKaon| < 2.0
HFT cuts (Topological cuts):
- cos(θ) > 0.995
- dcaDaughters < 50μm
- dca(K) and dca(π) > 80μm
- 1.6 < mass < 2.1
Fit and paramters:
TF1 * fun = new TF1("fun","gaus+expo(3)",1.66,2.1);
StiCA
EXT PARAMETER STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 p0 6.16124e+01 9.53131e+00 5.38792e-02 -2.50154e-05
2 p1 1.85647e+00 3.14432e-03 1.02123e-05 1.24624e-01
3 p2 1.68011e-02 2.53504e-03 7.94999e-04 -4.78431e-04
4 p3 7.67835e+00 1.98301e-01 -1.38050e-03 -3.05746e-03
5 p4 -1.49274e+00 1.06471e-01 7.25991e-04 -1.28615e-02
Sti
EXT PARAMETER STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 p0 4.44665e+01 8.25449e+00 -2.35776e-02 9.11402e-05
2 p1 1.85592e+00 3.44923e-03 3.54793e-05 -1.85151e-01
3 p2 1.85548e-02 4.24689e-03 3.22825e-03 -1.25879e-03
4 p3 7.05049e+00 2.43535e-01 1.50899e-03 -5.21653e-02
5 p4 -1.37969e+00 1.30599e-01 -7.50636e-04 -9.47477e-02
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