Additional lepton and background suppression
Kenji Hamano
Last modified : Aug 22, 2005
Back to Home
Back to privious page
Run4 was used. Luminosities are approximately 25 fb-1
Bhabha veto is applied.
Tighter D reconstruction is applied
D mass plots from AddLepton subskims:
D0 mass (D0->Kpi) : Plep cut dependence
D0 mass (D0->Kpi) : MC components
Dch mass (Dch->Kpipi) : MC components
Fractional uncertainty of signal
Delta_S / S = sqrt[(nSig + nBkg + rho*rho*nBkg*nBkg)] / (nSig)
Setting rho = 0
Only D mass peak region: 1.845 GeV < D mass < 1.885 GeV for D0
1.849 GeV < D mass < 1.889 GeV for Dch
D0Kpi mode
BToDlnu skim
nSig = 378510, nBkg = 519317, Delta_S/S = 2.503e-3
AddLep sub-skim. No AddLep momentum cut
nSig = 144017, nBkg = 181401, Delta_S/S = 3.961e-3
P_lep < 2.7 GeV (High AddLep momentum cut)
nSig = 143944, nBkg = 180117, Delta_S/S = 3.955e-3
0.6 GeV < P_lep < 2.7 GeV
nSig = 72995, nBkg = 87097, Delta_S/S = 5.481e-3
0.8 GeV < P_lep < 2.7 GeV
nSig = 56372, nBkg = 66928, Delta_S/S = 6.228e-3
1.0 GeV < P_lep < 2.7 GeV
nSig = 42498, nBkg = 50291, Delta_S/S = 7.168e-3
1.2 GeV < P_lep < 2.7 GeV
nSig = 31140, nBkg = 36551, Delta_S/S = 8.355e-3
1.4 GeV < P_lep < 2.7 GeV
nSig = 21829, nBkg = 25735, Delta_S/S = 9.991e-3
1.6 GeV < P_lep < 2.7 GeV
nSig = 13805, nBkg = 16996, Delta_S/S = 12.71e-3
DchKpipi mode
BToDlnu skim
nSig = 805798, nBkg = 871547, Delta_S/S = 1.607e-3
AddLep sub-skim. No AddLep momentum cut
nSig = 285339, nBkg = 313060, Delta_S/S = 2.711e-3
P_lep < 2.7 GeV (High AddLep momentum cut)
nSig = 285180, nBkg = 311696, Delta_S/S = 2.709e-3
0.1 GeV < P_lep < 2.7 GeV
nSig = 189695, nBkg = 214167, Delta_S/S = 3.350e-3
0.2 GeV < P_lep < 2.7 GeV
nSig = 189648, nBkg = 214133, Delta_S/S = 3.351e-3
0.6 GeV < P_lep < 2.7 GeV
nSig = 116329, nBkg = 136494, Delta_S/S = 4.322e-3
0.8 GeV < P_lep < 2.7 GeV
nSig = 82493, nBkg = 102911, Delta_S/S = 5.220e-3
1.0 GeV < P_lep < 2.7 GeV
nSig = 57754, nBkg = 76789, Delta_S/S = 6.351e-3