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CCbar analysis M. Guler, METU, Ankara
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0mu/1mu selection I: If (a vertex with one TT-matched track & Parent track (at least 0ne- segment) & at least two-segment daughter having TT-hits is reconstructed) II: If (a vertex with one-TT matched track & at least 3-segment Isolated Muon (or good hadron in 0mu) is reconstructed) If (a vertex with one-TT matched track & at least 3-segment Isolated Muon (or good hadron in 0mu) is reconstructed)III: If(a vertex wih at least one-TT track && a second vertex with tracks having TT-hits ) IV: If(a muon track (or good hadron in 0mu) is recontructed && at least 3 – segment track stop in the same plate. )
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Data sample:Map-03-04-15 (157846 events) Netscan Nucleus:Ver-03-09-02 Selection:SatoMurat-ver03 && golden-04-02-02.awk NuMu-CC events= 95450(93890) -Selected= 2816 -2059 charm -5 double charm 0mu events= 26568+1502 selected=827 -347 charm - 3 double charm Data sample
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TT #6 TT #1, P d2 >4.11 GeV/c @ 90 C.L. TT #3, P d1 >3.81 GeV/c @ 90 C.L. TT #2, P d >1.82 GeV/c @ 90 C.L. pl26 76925575 E=41.4GeV
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= 14.9+-2.0 mrad 1ry@pl26 Ns=2, Nh=0 V2 @pl 26 =104.2 mrad fl= 223.9 m Min_mass >0.68 GeV @ 90 CL. kink @pl 26 fl= 163.0 m =179.0 mrad P T = 0.719 -0.258 P T = 0.719 -0.258 GeV/c(MCS) P T >0.323 GeV/c @ 90 C.L. +0.786 76925575 co-planality
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TT #6 P P >0.66 GeV/C @ 90 CL. TT #3 P d4 >2.72 GeV/c @ 90 CL. TT #8, P d2 >4.66 GeV/C @ 90 CL. TT #5, P d1 > 1.39 GeV/C @ 90CL. pl23 pl22 81332312 81332312 E=29.9GeV P d3 >3.33 GeV/c @ 90 CL.
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= 24.2+-5.3 mrad = 24.2+-5.3 mrad = 36.1+-0.3 mrad = 36.1+-0.3 mrad 81332312 1ry@pl23 Ns=1, Nh=3 V2(1) @pl 23 =96.3 mrad fl= 62.8 m Min_mass >0.76 GeV @ 90 CL. V2(2) @pl 22 fl= 976.6 m =203.4 mrad Min_mass >1.33 GeV @ 90 CL.
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1ry@pl9 Ns=2, Nh=0 kink @pl 9 =182.9 mrad fl= 50.9 m trident @pl 8 fl= 398.0 m E=21.6 GeV Pl 9Pl 8 TT #2 TT #1 TT #3 TT #4, P = ? 56452542 56452542 rejected rejected
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77393952 77393952
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1ry@pl28 Ns>10, Nh>10 Kink @pl 26 =79.4 mrad fl= 1367.5 m P T = 0.079 -0.01 GeV/c (MCS) P T >0.047 GeV/c @ 90 CL. trident @pl 25 fl= 2556.5 m 78220511 78220511 Pl28 Pl 26pl 25 Pl28 Pl 26pl 25 E=9.9 GeV P=-12.2GeV/c +0.02 Evis=22.2GeV/c
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E=36.9 GeV P=-16.9 GeV/c Pl31 pl30 Pl31 pl30 79044944 79044944 P d1 >4.70 GeV/c @ 90 CL.(TT #2) P d2 >0.67 GeV/c @ 90 CL. P d2 >0.67 GeV/c @ 90 CL. P d3 >2.32 GeV/c @90 CL.(TT #7) P d2 >1.92 GeV/c @90 CL.(TT #5) P d2 >1.92 GeV/c @90 CL.(TT #5) Evis= 53.8 GeV
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d1 d2 D0D0D0D0 = 14.3+-2.0 mrad 79044944 79044944 1ry@pl31 Ns=4, Nh=0 V2 @pl 31 op = 340.2 mrad fl= 58.2 m Min_mass> 0.79 GeV/c @90 CL. (using MCS momentums) V4 @pl 30 fl= 761 m co-planality
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77891071 77891071 E=35.4 GeV P=-13.5 GeV/c Pl 7 Pl 6pl 4 Pl 7 Pl 6pl 4 Evis=48.9 GeV P>2.04 GeV @90 CL P>0.31 GeV @90 CL P>1.92 GeV @90 CL
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d1 d2 D0D0D0D0 = 17.2+-2.0 mrad 1ry@pl7 Ns=6, Nh=1 V2 @pl 6 fl= 257.0 m M min > 0.58 GeV @90 CL kink @pl 4 fl= 2271.6 m = 67.4mra d P T > 0.14 GeV @ 90 CL 77891071 77891071 co-planality
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77691080 77691080 E=17.5 GeV P=-22.9 GeV/c P33 Pl31 pl29 P33 Pl31 pl29 Evis=40.4 GeV P d > 0.39 GeV/c @90 CL. P d1 >2.08 GeV/c @90 CL. P d1 >2.08 GeV/c @90 CL. TT #4 P d2 > 1.09 GeV/c @90 CL.
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d1 d2 D0D0D0D0 = 52.4+-2.0 mrad 77691080 77691080 1ry@pl33 Ns=2, Nh=4 kink @pl 231 =302.0 mrad fl= 1445.5 m P t = 0.2 -0.04 P t = 0.2 -0.04 GeV/c (MCS) P t > 0.12 GeV/c @ 90 CL. V2@pl 29 op = 298.0 mrad fl= 3012.6 m Min_mass>0.77 GeV @ 90 CL. +0.07 +0.07 co-planality
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1ry@pl22 Ns=2, Nh=0 Trident @pl 20 fl= 1105.4 m Min_mass>0.57 GeV @ 90 CL. V6?@pl 20 fl= 1211.2 m Min_mass>1.8 GeV @ 90 CL. 51872165 51872165 E=75.4GeV P=-106.7 GeV/c P22 Pl20 P22 Pl20 Evis=182.3 GeV P t1 >3.81 GeV/c P t1 >3.81 GeV/c P t2 >1.29 GeV/c P t2 >1.29 GeV/c P t3 >2.58 GeV/c P d1 > 2.38 GeV/c P d2 >0.92 GeV/c P d2 >0.92 GeV/c P d3 > 1.03 GeV/c P d4 >1.31 GeV/c V5 ??
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MC simulation Herwig(G.D.L)--->Eficass ---->Chant ~30 K CC && ~53 K NC ccbar events CC NC
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ccbar MC 1521 m 2395 m CC NC
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Charm fractions CC NC
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D 0 D 0 D + D - D D c c - D 0 D 0 D + D - D s + D s - c c - 18.926.913.6 15.7 1.3 6.6 16.1 1.0 (%) Hadronization D 0 D 0 D + D - D D c c - D 0 D 0 D + D - D s + D s - c c - 24.928.7 18.5 15.9 2.8 4.9 4.1 0.2 (%) NC CC
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Efficiency estimation NCDIS CCBAR MC events All events : 53034 In Emulsion : 28792 (54.3%) Prdc>0 : 13534 (47.0%) Right stack : 12589 (93.0%) SB found in CS: 10066 (79.9%) Located as 0mu: 4862 (48.3%) Selected : 1716 (35.3%) net ±0.7 loc ±0.2 CCDIS CCBAR MC events All events : 29939 In Emulsion : 16264 (54.3%) Prdc>0 : 7954 (48.9%) Right stack : 7500 (94.3%) Muon found : 6320 (85.1%) Located as CC : 4661 (73.8%) Selected : 1055 (22.6%) net ±0.6 loc ±0.4
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Selection efficiencies
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Kink PT
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Location efficiencies
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Primary vertexsecondary vertexevent yield N -- c X prong N -- ch Xh white kink N -- ch Xh white trident N -- c h X h white C5 N -- ch 0 X h 0 white V2 N -- ch 0 X h 0 white V4 Overall0.79 Background in CC ccbar
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Primary vertexsecondary vertexevent yield N -- c X prong N -- ch Xh white kink N -- ch Xh white trident N -- c h X h white C5 N -- ch 0 X h 0 white V2 N -- ch 0 X h 0 white V4 Overall0.12 Background in NC ccbar
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3 candidate events in NC are signal and background is 0.12±0.02 loc(ccbar) / loc(NC) =0.77+-0.01 (cc)/ (NC)=(3.5±2.1±0.6)x10 -4 Production rate
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5 candidate events in NC are signal and background is 0.79±0.10 loc(ccbar) / loc(NC) =0.51+-0.01 (cc)/ (CC)=(3.9±1.9(stat)±0.6(syst.))x10 -4 2 events survive P T >0.25 GeV/c assume bg ~0.2 loc(ccbar) / loc(NC) =0.51+-0.01 (cc)/ (CC)=(1.7±1.3(stat)±0.3(syst.))x10 -4 Production rate
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Status Draft2 is ready Waiting the comments (some already received)
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D 0 (%) D + (%) D s (%) c (%) D 0 (%) D + (%) D s (%) c (%) D 0 23.5+-0.3 14.9+-0.2 2.1+-0.1 16.6+-0.3 D - 12.4+-0.2 7.9+-0.2 1.0+-0.1 8.9+-0.2 D s 5.5+-0.2 3.2+-0.1 0.4+-0.1 3.5+-0.1 neutral + neutral= 23.5+-0.3 % neutral + charged= 51.5+-0.3 % charged+ charged= 25.0+-0.3 % Hadronization
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V2 V4 V6 C1 C3 C5 V2 V4 V6 C1 C3 C5 V2 14.6+-0.2 7.2+-0.2 0.1+-0.1 18.6+-0.3 18.9+-0.2 1.1+-0.1 V4- 0.8+-0.10.0+-0.1 4.2+-0.1 4.6+-0.1 0.3+-0.1 V6- - 0.0+-0.1 0.1+0.1 0.0+-0.1 0.0+-0.1 C1- - - 5.1+-0.210.8+-0.2 0.3+-0.1 C3- - -- 5.7+-0.2 0.8+0.1 C5- - -- - 0.0+-0.1 Hadronization
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