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BaBar summer success

BaBar summer success. Riccardo Faccini Universita’ “La Sapienza” and INFN Rome BaBar Collaboration Meeting SLAC Sep 12 th 2006. Overall contribution to ICHEP. Belle contributed only 28 papers. 114 Contributed papers cfr 69 in 2005 and 72 in 2004 70 submitted to journal

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BaBar summer success

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  1. BaBar summer success Riccardo Faccini Universita’ “La Sapienza” and INFN Rome BaBar Collaboration Meeting SLAC Sep 12th 2006

  2. Overall contribution to ICHEP Belle contributed only 28 papers • 114 Contributed papers • cfr 69 in 2005 and 72 in 2004 • 70 submitted to journal • Full listing (ordered by topic) in http://www.slac.stanford.edu/BFROOT/www/Physics/Planning2006/ICHEP/ICHEP_pap.html • Two plenary talks • 24 parallel talks in 6 different sessions • All updates are on 345 fb-1 (315 onpeak) • Up to June 1st

  3. Publication History Since Sep 1 2005: BaBar: 70 Belle 28

  4. BaBar Belle F P W F P W Talks Content: a comparison Legenda: F: new on full stat P: new on partial stat W: already presented in winter ‘06 Same set of results on the very last chunk of data, but otherwise BaBar has >2 times more results Note: both collaborations presented all results new since last round on summer conferences

  5. Reader Digest of results Semileptonic B: 10 papers Radiative B decays: 10 papers CP Violation, a: 5 papers Charmless Hadronic B: 19 papers Charm(onium) prod and decay 13 papers B to charm decays: 12 papers Tau and low-energy: 8 papers CP Violation g: 8 papers Charm(onium) spectroscopy: 16 papers CP Violation, b: 14 papers Courtesy of D. Lange

  6. CP violation in B decays Semileptonic B: 10 papers Radiative B decays: 10 papers CP Violation, a: 5 papers Charmless Hadronic B: 19 papers Charm(onium) prod and decay 13 papers B to charm decays: 12 papers Tau and low-energy: 8 papers CP Violation g: 8 papers Charm(onium) spectroscopy: 16 papers CP Violation, b: 14 papers Reviewed in http://ichep06.jinr.ru/reports/2_hazumi_ichep2006.ppt and 3_10p20_Kowalewski.pdf

  7. CP violation in Charmonium • Repeated standard set of measurements • 2.5 s direct CP violation in CP=-1 modes sin2b=0.710±0.034±0.0019 (was 0.722±0.040) (Belle: 0.642±0.031±0.017) l=0.932±0.026±0.017 (when floated on CP=-1 states) Belle has only updated J/YK0, still without publication

  8. Combination with Belle Measurements are consistent [2.1 s in the case of CCP] and the averages consistent with the SM. Still to work to make the samples uniform (J/Y K0 vs all modes)

  9. bs penguins Larger BaBar errors because of full Dalitz (see next slide) 4.9s from S=0 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) New result not yet in averages (more work needed) BaBar: 347M BB BaBar still exploits its luminosity significantly better than Belle Belle : 535M BB

  10. First ambiguity free measurement of b in bs penguins BK+K-K0 • 75% of BKKK0 is not BfKs • Important to understand the underlying background and its interference • Full Dalitz analysis performed (with f,f0, and non resonant component) • Knowledge of strong phase allows to extract weak phases without ambiguities • Assuming SM (i.e. same weak phase for all final states) • b=0.38±0.08 rad [SM=0.35]  very good agreement with SM • ambiguity on b resolved at the 4s level (SM favored) • Twice more sensitive that Belle in BDh0

  11. First TD analysis in bd penguins BKsKs sPlots Old Result:

  12. N00 = 98+32±22 −31 Measurement of a No news from Belle The error on a from rr is dominated by the limit on r0r0 First evidence of Br0r0 • B0 • Significance 3.0 • = [1.2 ± 0.4 (stat.) ± 0.3 (syst.)]x10-6 • fL= 0.86+0.11-0.13 (stat.) ± 0.06 (syst.)  f Error on a from 11o to 14o Previous BaBar result: (0.5±0.4) 10-6 Belle never presented a result Highly improved sensitivity

  13. _ B0 tags Update on 2-body B0 tags N00 = 140 ±25 00 asymmetry S = −0.53 ±0.14 ±0.02 Br00= (1.48 ±0.26 ±0.12)  10−6 C = −0.16 ±0.11 ±0.03 C00 = −0.33 ±0.36 ±0.08 3.6s evidence of CPV

  14. Comparison with Belle’s pp (C = -A) 2.3s diff. btw. Belle and BaBar

  15. 169.7° CKM fit no  in fit [164, 176]º at 68.3% C.L. Interpreting Bpp, Brr, and Brp results in terms of a

  16. Measurement of g BD*K BDK B+ B+ Update of BD0K [Dalitz] B- B- Errors shrink (in particular systematics), but rB is smaller (x,y closer to 0)  error on g increases … No update from Belle (was 70+/-31+12-10+14-11 ) g = 92 +/- 41 +/-10 +/- 16

  17. Other B decays Semileptonic and leptonic B: 12 papers Radiative B decays: 10 papers CP Violation, a: 5 papers Charmless Hadronic B: 19 papers Charm(onium) prod and decay 13 papers B to charm decays: 12 papers Tau and low-energy: 8 papers CP Violation g: 8 papers Charm(onium) spectroscopy: 16 papers CP Violation, b: 14 papers Reviewed in http://ichep06.jinr.ru/reports/5_12p10_Barlow.ppt and 3_10p20_Kowalewski.pdf

  18. buln exclusive: probing theory New “loose cuts method” Old technique, 80 fb-1 4 more results on Vub and 2 on Vcb

  19. Brg No update from Belle • We have our own observation of all modes (as opposed to only r0g) • Central values in between ours past ones and Belle BaBar ’06 315 fb-1

  20. Btn: a year of emotions • April: Belle announces at FPCP a >4s evidence for Btn • May-July: BaBar struggles to reproduce the accuracy of Belle (in an area where we were traditionally more advanced) • August: • BaBar presents only one of the two independent analyses while still investigating • Belle presents an errata of the efficiencies by a factor 2!!!! • Significance down to 3.5s, BF a factor 2 larger • BaBar and Belle have similar accuracies • Soon: BaBar is ready to publish both analyses  expect an error which is 40% smaller than Belle’s BF(B++)

  21. Non B physics Semileptonic B: 10 papers Radiative B decays: 10 papers CP Violation, a: 5 papers Charmless Hadronic B: 19 papers Charm(onium) prod and decay 13 papers B to charm decays: 12 papers Tau and low-energy: 8 papers CP Violation g: 8 papers Charm(onium) spectroscopy: 16 papers CP Violation, b: 14 papers Reviewed in http://ichep06.jinr.ru/reports/4_11p30_pakhlov.ppt

  22. Belle has another “2s” effect in DKp  Close to observation? D mixing • Two innovative results in multibody decays Kppp Kpp0 Combined RM=(0.020+0.011-0.010)% No mixing possible @ 2.1% C.L.

  23. Yy(2S)pp Inconsistent with Y(4260): yet another state? More new states Confirmation of Belle + better params Xc’ Wc* First observation (in 3 states) DsJ

  24. Summary • At ICHEP’06 BaBar has achieved record productivity, overwhelming the direct competitor • Congratulations to everybody!!! • In the topics where the luminosity matters the refined statistical analysis technique makes BaBar competitive even with 35% less luminosity (345 M BB/547 M BB) • Showed dominance in several areas such as: • CPV in bs penguins • New modes • Measurements related to a • First observation of Br0r0 • Dalitz Time Dependent analyses • First full analysis of BKKK0 (including fK0) • D-mixing in multibody D decays • Innovative technique to exploit also these decay modes • Leptonic B Decays • After Belle corrected a mistake in their efficiencies, we have a measurement of BF(Btn) with same accuracy as them and potentially 40% better by fall • semileptonic B decays, Charm and Charmonium spectroscopy, … • Full listing of conf paps (ordered by topic) in • http://www.slac.stanford.edu/BFROOT/www/Physics/Planning2006/ICHEP/ICHEP_pap.html

  25. Backup slides

  26. Update of rr, rp • r+r- • S=-0.19±0.21 • C=-0.07±0.15  aeff=(96+7-6)o [was 100+10-7] • fL=0.977±0.024 • rp now was A=-0.142+/-0.041+/-0.015S=0.01+/-0.12+/-0.03C=0.154+/-0.090+/-0.037 Direct CPV now at 3 sigma

  27. Impact on a Improvement in hp0,pp0 allow to almost exclude dips between the multiple solutions

  28. Evolution of sin2b measurements Present CKM fit Present WA BaBar 2006: 0.710±0.034

  29. Evolution of SfK measurements BaBar 2006: 0.31±0.29 Dalitz analysis allows better understanding of interference of other modes

  30. Summary • Alpha • Evidence of r0r0spoils measurement of a • Error up to 20o • pp measurements redone with reduced errors • 4s evidence of CP violation • Update on gamma • rB getting further smaller  increased error on g • Beta • Dalitz KKKs measurement • Update on all bs penguin • H’Ks closer to SM • Others mostly similar • Semileptonic • Lot of input to reduction of theo errors • rg • First evidence of the charged mode • Our own observation of the neutral modes (half way wrt Belle) • tn • Behind Belle  found we have to improve quickly sensitivity • D mixing • Two of the three most sensitive modes ready (the other one is coming) • Still only at the 2s level • Progress on spectroscopy • New puzzles

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