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JOLANTA BRODZICKA

Doubly charmed B decays. B  D(*)D(*)K. ( for ~140 fb -1 ). October 10, 2003. JOLANTA BRODZICKA. Institute of Nuclear Physics, Krakow. Analysis details (no changes). good charged tracks with abs(IP_dz)< 5cm abs(IP_dr)< 0.4cm R 2 < 0.3

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JOLANTA BRODZICKA

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  1. Doubly charmed B decays B D(*)D(*)K ( for ~140 fb-1 ) October 10, 2003 JOLANTA BRODZICKA Institute of Nuclear Physics, Krakow

  2. Analysis details (no changes) • good charged tracks with abs(IP_dz)< 5cm abs(IP_dr)< 0.4cm • R2< 0.3 • K± : P(K/) > 0.4± : P(/K) > 0.1 electron veto: el_id < 0.95 • K0Sabs( M(+ -) - MKs ) < 15 MeV only good_Ks • 0 E > 50 MeV abs( M( ) -M0 ) < 15MeV • D0 reconstr. ( p(D) < 2 GeV in (4S) system) • D*±, D*0 reconstr. ( p(D*) < 2 GeV in (4S) system) • B±, B0 reconstr. B vertex fit: with IP and B lifetime constraints • BF ~ 28% ( K , K3 , K0 , Ks , KsKK , KK ) • M (DREC) cut: ± 20MeV (D0 K0 : ± 50MeV) • vertex fit (conf_level>0.) , mass constraint fit • D*±  D0±(D*±  D± 0hopeless ) D*0  D00 ( D*0  D0 difficult ) • abs(M(D*±)-M(D)-mPDG)< 2.5MeV abs(M(D*0)-M(D)-mPDG)< 5MeV • vertex fit (conf_level>0.) JOLANTA BRODZICKA B  D(*)D(*)K October 10, 2003

  3. S(MD) LR_D (MD) = + S(MD) B(MD) best B candidate choice method S(MD), B(MD) parameterization from MD fit D probability : S(MD*), B(MD*) parameterization from MD*fit S(MD*) D* probability : LR_D*(MD*) = S(MD*) + B(MD*) LR_B = LR_D(*)1× LR_D(*)2 B probability for : best B candidate : with max LR_B LR_B cut used also for background discrimination JOLANTA BRODZICKA B  D(*)D(*)K October 10, 2003

  4. B± D0 D0B K± LR > 0.04 N/7.5MeV N/2MeV Plot for Mbc>5.265 GeV plot for abs(E)<25MeV E Mbc Fully reconstructed signal (from 2dimlikelihood fit) XNSIG_1 94.412±12.974 XE0_1 -0.3193E-02± 0.1116E-02 XEW_1 0.5890E-02± 0.0751E-02 XM0_1 5.2815± 0.2860E-03 XMW_1 0.2506E-02 ± 0.0371E-02 S=94.4± 13.0 eff= 4.91*10-4 BF = ( 1.27 ± 0.17 ) * 10-3 JOLANTA BRODZICKA B  D(*)D(*)K October 10, 2003

  5. B0  D*± D0 K± LR > 0.05 Plot for Mbc>5.27GeV Fully reconstructed signal (from 2-dim Mbc vs.E likelihood fit) N/7.5MeV XNSIG_1 86.957±10.600 XE0_1 -0.18782E-02 ± 0.09514E-02 XEW_1 0.68986E-02 ± 0.08763E-02 XM0_1 5.2807± 0.4122E-03 XMW_1 0.3034E-02 ± 0.0311E-02 E Plot for abs(E)<25MeV N/2MeV S = 86.9 ± 10.6 eff= 2.94 *10-4 BF = ( 1 .94± 0.24 ) * 10-3(stat. error) Mbc JOLANTA BRODZICKA B  D(*)D(*)K October 10, 2003

  6. B± D*0 D0B K+ , D*0B D0 K- ( right D*0K flavor comb.)LR > 0.01 Plot for Mbc>5.265GeV N/7.5MeV Fully reconstructed signal (from 2-dimlikelihood fit) XNSIG_1 49.350±11.649 XE0_1 0.1004E-02± 0.4319E-02 XEW_1 0.1821E-01 ± 0.0427E-01 XM0_1 5.2819± 0.9850E-03 XMW_1 0.3991E-02 ± 0.0853E-02 E Plot for abs(E)<45MeV N/2MeV S = 49.4 ± 11.6 Signif.= 7.0 eff= 0.63 *10-4 BF = ( 5 .16 ± 1.21 ) * 10-3(stat. error) Mbc JOLANTA BRODZICKA B  D(*)D(*)K October 10, 2003

  7. B± D*0 D0B K± ( both D*0K flavor comb.)LR > 0.01 Plot for Mbc>5.265GeV Exclusively reconstructed signal (from 2-dimlikelihood fit) N/7.5MeV XNSIG_1 77.897±13.715 XE0_1 0.1496E-02± 0.3919E-02 XEW_1 0.1905E-01 ± 0.0325E-01 XM0_1 5.2816± 0.6192E-03 XMW_1 0.3371E-02 ± 0.0556E-02 E Plot for abs(E)<45MeV N/2MeV Partially reconstructed signal XNSIG_2337.34±36.48 XE0_2-0.1619± 0.0028 XEW_2 0.4237E-01 ± 0.0475E-01 XM0_2 5.2816± 0.8236E-03 XMW_2 0.7317E-02 ± 0.0801E-02 Plot for abs(E+0.16)<50MeV N/2MeV Mbc JOLANTA BRODZICKA B  D(*)D(*)K October 10, 2003

  8. B± D*± D0 K0s LR > 0.005 Plot for Mbc>5.27GeV Fit results for directly reconstr. signal (from 2-dim Mbc vs.E likelihood fit) N/7.5MeV XNSIG_1 40.245 ±10.121 XE0_1 -0.1310E-02± 0.2545E-02 XEW_1 0.1098E-01± 0.0265E-01 XM0_1 5.2808± 0.8034E-03 XMW_1 0.27644E-02 ± 0.7662E-03 E Plot for abs(E)<25MeV N/2MeV S = 40.2 ± 10.1 Signif. = 7.5 Mbc JOLANTA BRODZICKA B  D(*)D(*)K October 10, 2003

  9. B0 D* ± D*0 K± LR > 0.0 Plot for Mbc>5.27GeV Fitting results (2dim fit) XNSIG_1 43.420±10.116 XE0_1 -0.3409E-02 ± 0.7449E-02 XEW_1 0.3055E-01 ± 0.0709E-02 XM0_1 5.2814± 0.8450E-03 XMW_1 0.3218E-02 ± 0.0742E-02 E Plot for abs(E)<45MeV Stat. signif. = 7.1 Mbc JOLANTA BRODZICKA B  D(*)D(*)K October 10, 2003

  10. Possibility of Ds1+(2536) detection Generated 20K MC decays: B+ Ds1+(2536) D0B(Ds1)=5MeV Ds1+(2536)  D*0 K+ D0,D0B K LR > 0.01 For directly reconstr. signal: B+ D*0 K+ D0B For partially reconstr. signal: B+ D0 K+ D0B + missing pion N140 M0 2536  7.1 N1420 M0 2393  5.0 N/1MeV N/1MeV M ( D*0K±) M ( D0K±) -143MeV shift JOLANTA BRODZICKA B  D(*)D(*)K October 10, 2003

  11. Possibility of X(3872) detection (if any  ) Generated 20K MC decays: B+ X(3872) K+(X)=5MeV Mmin=M(D*0+D0) X(3872)  D*0D0B D0,D0B K LR > 0.01 For directly reconstr. signal: B+ D*0 D0B K+ For partially reconstr. signal: B+ D0 D0BK+ + missing pion N/1MeV N1100 N3400 N/1MeV M ( D*0D0B) M ( D*0D0B) JOLANTA BRODZICKA B  D(*)D(*)K October 10, 2003

  12. Dalitz plot for B± D0 D0B K± LR > 0.04 forsignal-box events:abs(E)<25MeV Mbc>5.27GeV M2 ( D0K± ) right M2 ( D0D0B ) M ( D0K± ) right (3770) N/10MeV M ( D0K± ) wrong M ( D0D0B ) JOLANTA BRODZICKA B  D(*)D(*)K October 10, 2003

  13. mass distr. for B  D0 D0B K± +missing for lostsignal-box events:abs(E+0.16)<50MeV Mbc>5.265GeV LR > 0.1 Hatched histogram: Mbc sideband events abs(E+0.16)<50MeV Mbc<5.26GeV normalized to backgr. in pion_lost signal box M ( D0K± ) right N/10MeV M ( D0D0 ) M ( D0K± ) wrong JOLANTA BRODZICKA B  D(*)D(*)K October 10, 2003

  14. Dalitz plot for B0  D*± D0 K± forsignal-box events:abs(E)<25MeV Mbc>5.27GeV LR > 0.005 Hatched histogram: Mbc sideband events abs(E)<80MeV Mbc<5.26GeV normalized to backgr. in signal box M2 ( D0K± ) M2 ( D*±D0 ) M ( D0K± ) also for LR > 0.01 ? N/10MeV M ( D*+K- ) M ( D*±D0 ) M ( D*+K- ) JOLANTA BRODZICKA B  D(*)D(*)K October 10, 2003

  15. mass distr. for B  D*± D0 K± +missing for lostsignal-box events:abs(E+0.16)<50MeV Mbc>5.265GeV LR > 0.05 Ds1 ? Hatched histogram: Mbc sideband events abs(E+0.16)<50MeV Mbc<5.26GeV normalized to backgr. in pion_lost signal box M ( D0K± ) N/10MeV M ( D*±D0 ) M ( D*+K- ) JOLANTA BRODZICKA B  D(*)D(*)K October 10, 2003

  16. Dalitz plot for B± D*0 D0B K± ( both D*0K flavor comb.) forsignal-box events:abs(E)<45MeV Mbc>5.265GeV LR > 0.01 Hatched histogram: Mbc sideband events abs(E)<80MeV Mbc<5.26GeV normalized to backgr. in signal box M2 ( D*0K± ) M2 ( D*0D0 ) M ( D*0K±) right N/10MeV 3.87GeV M ( D*0D0 ) M ( D0K± ) JOLANTA BRODZICKA B  D(*)D(*)K October 10, 2003

  17. mass distr. for B  D*0 D0B K± +missing for lostsignal-box events:abs(E+0.16)<50MeV Mbc>5.265GeV LR > 0.01 Hatched histogram: Mbc sideband events abs(E+0.16)<50MeV Mbc<5.26GeV normalized to backgr. in pion_lost signal box M ( D*0K± ) right N/10MeV M ( D*0D0 ) M ( D0K± ) JOLANTA BRODZICKA B  D(*)D(*)K October 10, 2003

  18. Dalitz plot for B± D*± D0 K0s LR > 0.002 forsignal-box events:abs(E)<25MeV Mbc>5.27GeV Hatched histogram: Mbc sideband events abs(E)<80MeV Mbc<5.26GeV normalized to background in signal box M2 ( D*±K0s ) M2 ( D*±D0 ) M ( D*±K0s ) N/10MeV M ( D*±D0 ) M ( D0K0s ) JOLANTA BRODZICKA B  D(*)D(*)K October 10, 2003

  19. mass distr. for B  D*± D0 Ks +missing for lostsignal-box events:abs(E+0.16)<50MeV Mbc>5.265GeV LR > 0.05 Hatched histogram: Mbc sideband events abs(E+0.16)<50MeV Mbc<5.26GeV normalized to backgr. in pion_lost signal box Ds1 ? M ( D*0K0s ) N/10MeV M ( D*±D0 ) M ( D0K0s ) JOLANTA BRODZICKA B  D(*)D(*)K October 10, 2003

  20. Dalitz plot for B0 D* ± D*0 K± LR > 0.0 for signal box: Mbc>5.27GeV abs(E)<45MeV ~7 events at the threshold at 2.54 GeV come from Ds1± (2536)-> D*0K± ? M2 ( D*0K± ) M2 ( D*±D*0 ) M ( D*0K± ) M ( D*±D*0 ) M ( D*±K ) JOLANTA BRODZICKA B  D(*)D(*)K October 10, 2003

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