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Belle results relevant to LHC

Belle results relevant to LHC. S.L. Olsen U of Hawai’i. Pheno-07 May 8, 2007 Madison Wisc. CKM Global Fit (Sep.2006). CKM is “correct” at tree level. sin 2  1 from B  f CP + B  B  f CP interf. Sanda, Bigi & Carter:. J/ y. V cb. B 0. K S. .  V* 2. td. J/ y. V*. V tb. td.

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Belle results relevant to LHC

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  1. Belle results relevant to LHC S.L. Olsen U of Hawai’i Pheno-07 May 8, 2007 Madison Wisc.

  2. CKM Global Fit (Sep.2006) CKM is “correct” at tree level

  3. sin21from BfCP + BBfCPinterf. Sanda, Bigi & Carter: J/y Vcb B0 KS  V*2 td J/y V* Vtb td B0 B0 KS Vtb V* td

  4. Next step: use bs penguins Example: no KM phase f1 * Vtd , h’, K+K- , h’, K+K- + B B * Vtd f1 _ SM: sin2f1 =sin2f1 from BJ/y KS (bc c s) unless there are other, non-SM particles in the loop eff

  5. SM NP? ~ g ~ ~ s b t x i.e. > 0.1 for MNP accessible @ LHC ~

  6. Smaller than bgccs in all of 9 modes Theory tends to predict positive shifts (originating from phase in Vts) 2006: f1 with bgs Penguins Naïve average of all b g s modes sin2beff = 0.52 ± 0.05 2.6 s deviation between penguin and tree (b g s) (b g c)

  7. eff History of sin2f1 2.8s 2.6s 2.6s 3.1s 3.9s sin2f1 from bccs decays (2007) D  0.15 sin2f1 (bqqs decays) (Belle&BaBar average) 2002 2003 2004 2005 2006

  8. How to make D small? ~ g ~ ~ s b x • Tune the squark mixing terms • is there enough freedom to do this? • Make the squark masses degenerate • invoke a GIM-like mechanism • Make the SUSY mass scale very high (~few TeV) • not much fun for LHC experimenters

  9. B  Decays w/ “Missing E(>1n)” SM : B decay constant Lattice QCD BSM : sensitive to New Physics from H

  10. 449M BB B tn(nearly invisible decays) tn signal B e- (8GeV) e+(3.5GeV) Υ(4S) p B Tag-side: Full reconstruction N= 680k eff.= 0.29% purity = 57% 4-momentum determined  B meson beam ! Charged B

  11. B  candidate event Missing momentum

  12. B gtn results Belle BaBar PRL97, 251802 (2006). hep-ex/0608019 Belle Hadronic tag D l n tag e+nn (3.6%) m+nn (2.4%) p+n (4.9%)p+p0n(2.0%) pppn (0.8%) t+  e+nn (eff: 4.1%), m+nn (2.4%), p+n (4.9%), p+p0n (1.2%) No clear signal First evidence, 3.5 s

  13. We measure Branching fraction Babar preliminary Product of B meson decay constant ƒB and CKM element |Vub | Compare with

  14. Constraints on H mass Use known fB and |Vub |Ratio to the SM BF. excluded rH=1.130.51 excluded

  15. BXsg W+, H+

  16. Nakao

  17. NNLO theory Theory News M. Misiak et al, hep-ph/0609232, PRL 98,022002(2007) NNLO calculation (29826) x 10-6

  18. 95% CL lower limit on H+ mass from exp and NNLO 300 GeV Error on BF BaBar/Belle/CLEO avg  M(H+)>295 GeV Central value of BF M. Misiak et al, hep-ph/0609232, PRL 98,022002 (2007)

  19. or here Look here 350- BXsg Btn

  20. Validate the EECL simulation using double-tagged events (with on the signal side) Extra Calorimeter Energy Signal reconstruction (purity ~ 90%) MC: B+B–: 494 ± 18 B0B0: 8 ± 2 Combined: 502 ±18 Data: 458 _

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