QM2017 abstract
version 1.0 : https://drupal.star.bnl.gov/STAR/system/files/QM_Abstract_ZhouLong_v1.pdf
2017-01-08
Check code with Nasim
Nasim : https://drupal.star.bnl.gov/STAR/system/files/nasim_ds_longcut.pdf
Long : https://drupal.star.bnl.gov/STAR/system/files/Ds_ch1_aa.pdf
Long Full sample : https://drupal.star.bnl.gov/STAR/system/files/Ds_ch1_full.pdf
cuts list:
V0tree production
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Event cut
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|vz|<6 cm
|vzdiff|<3cm
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Track cut
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Nhitfit>=20
Hitfit_ratio>=0.51
HFT match
Dca>70 um
Pt>0.5 GeV
|eta|<1
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PID cut
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Hybrid PID :
If(beta>0) |1-1/beta|<0.04
Else |nsigma_pi|<3 , |nsigmak|<2
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Pair cuts
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secSigma<=300um( )
dcaDaughter<=200 um
|kk_mass - phi_mass|<=15 MeV
1.8<=|kkpi_mass|<=2.2
|y|<=1
decayL>=50 um
cosTheta>=0.95
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Minitree production
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Event cut
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NULL
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Track cut
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Pt>0.5, Dca>70um && Dca<1000um
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PID cut
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NULL
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Pair Cut
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secSigma<400 um
cosTheta>0.9
Flag <=2 (select right charge sign : K+K-Pi+,K+K-Pi-)
|kk_mass - phi_mass|<20 MeV
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Cuts for signal
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Event cut
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Centrality>=0
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Track cut
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Pt>=0.5 GeV
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Topological Cuts :
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Basic cuts :
float Dca12Cut = 0.010;
float Dca3Cut = 0.009;
float dcaDaughtersCut = 0.01;
float DecayLCut = 0.01;
float CosTCut = 0.995;
float MassPhiCut = 0.004;
float CosThetaPriCut = 0.1;
0-10%:
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Pt<2.5
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Dca12 > Dca12Cut+0.0005
Dca3 > Dca3Cut+0.0005
dcaDaughters < dcaDaughtersCut - 0.001
decayLength > DecayLCut
cosTheta > CosTCut
fabs(pow(cosThetaPri,3)) > CosThetaPriCut
fabs(Mass_phi - M_PHI) < MassPhiCut - 0.0015
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Pt>2.5
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Dca12 > Dca12Cut - 0.001
Dca3 > Dca3Cut - 0.001
dcaDaughters < dcaDaughtersCut + 0.001
decayLength > DecayLCut
cosTheta > CosTCut - 0.001
fabs(pow(cosThetaPri,3)) > CosThetaPriCut
fabs(Mass_phi - M_PHI) < MassPhiCut + 0.001
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10-40%:
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Pt<2.5
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Dca12 > Dca12Cut
Dca3 > Dca3Cut
dcaDaughters < dcaDaughtersCut
decayLength > DecayLCut
cosTheta > CosTCut
fabs(pow(cosThetaPri,3)) > CosThetaPriCut
fabs(Mass_phi - M_PHI) < MassPhiCut
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Pt>2.5
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Dca12 > Dca12Cut - 0.002
Dca3 > Dca3Cut - 0.002
dcaDaughters < dcaDaughtersCut + 0.002
decayLength > DecayLCut
cosTheta > CosTCut - 0.005
fabs(pow(cosThetaPri,3)) > CosThetaPriCut
fabs(Mass_phi - M_PHI) < MassPhiCut + 0.002
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40-80 % :
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Pt<2.5
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Dca12 > Dca12Cut - 0.001
Dca3 > Dca3Cut - 0.001
dcaDaughters < dcaDaughtersCut + 0.001
decayLength > DecayLCut
cosTheta > CosTCut - 0.005
fabs(pow(cosThetaPri,3)) > CosThetaPriCut
fabs(Mass_phi - M_PHI) < MassPhiCut + 0.002
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Pt>2.5
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Dca12 > Dca12Cut - 0.002
Dca3 > Dca3Cut - 0.002
dcaDaughters < dcaDaughtersCut + 0.002
decayLength > DecayLCut
cosTheta > CosTCut - 0.01
fabs(pow(cosThetaPri,3)) > CosThetaPriCut
fabs(Mass_phi - M_PHI) < MassPhiCut + 0.004
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Cuts : Final cuts for QM 2017
https://drupal.star.bnl.gov/STAR/system/files/Summary%20my%20final%20cuts%20for%20QM%20DS.pdf
Systematic Error Study
Source 1 : Raw Yields
https://drupal.star.bnl.gov/STAR/system/files/sys_err_raw_yields.pdf
Source 2 : Rec Eff
https://drupal.star.bnl.gov/STAR/system/files/sys_err_rec_eff.pdf
Source 3 : Tpc Tracking
