Report of WG5: angles from B- decays with charm

Transcription

1 (φ 1, φ 2, φ 3 )=(β,α,γ) Report of WG5: angles from B- decays with charm Amarjit Soni HET, BNL soni@bnl.gov

2 Angles from charm FS s Angle Process CP-type Speaker φ 1 =β B 0 ->`ψ K MIXCP Mannel,Browder,Ford,Lange,Kusaka Sumisawa,Verderi,Miyabayashi,Jesik,(Datta), 2β+γ; β Gershon,Bruinsma,Iyutin,Albert,Keum B 0 ->D 0(*) h 0 MIXCP Ganzhur,Ronga,Voena,Baak,Polci,Sordini D 0 =K 0(*) [π 0,ρ 0,ω,η ];{K + K -,ππ..};[k +(*) π(ρ,a) -,..];{K + π - π 0 (η );K 0 π + π- };[K+n π.] φ 3 = γ B + ->D 0(*) K + DIRCP Atwood,Trabelsi,Rama,Grossman,Zupan,Abe Schune,Neri,Zeng φ 3 = γ B S D S K, B d ->D (*) π MIXCP Wilkinson φ 3 = γ B c DIRCP Fleischer

3 Other Important Topics 1.Charm Factory Input Petrov (also, Atwood, Zupan ) Theory Asner 2 EXPT 2. Hadron Colliders Tevatron: Jaesik,Lyutin LHCb : Wilkinson LHC(ATLAS): Ferretti Imp. Outcome fruitful meeting bet.cleo Belle,Babar,folks to coordinate info for optimal impact Session had huge # of many very useful talks!

4 Sincere Apologies Omissions are guaranteed, though not intended.

5 Four Giants

6

7 Acknowledge essential help from 4 giants(3 co-convenors, and David Atwood) 1. Luca Cavoto 2. Robert Fleischer 3. Tim Gershon

8 Its all about errors:summary Qty CKM05 Sum06 End08 IEE05 ITE L/expt ~2 ~5 ~10 δ(sin2β) ~.037 ~.028 ~ δφ 3 20,10,10 9,7,7 5 2?.05 ( e.g)cfi: 0 100% Notes: CFI=CHEAP-B-Factory L/expt = 10 8 B-pairs: IT(E)E=Irreducible Th( ex) error Sin2β =.728,.056,.023 BELLE(L~1.5) BROWDER.722,.040,.023 BABAR(L~2) LANGE.725,.037 (WA) φ 3 70,31,12,13 BABAR(L~1) SCHUNE 68,15,13,11 BELLE(L~3) ABE

9 Mannel

10 Lange(BABAR)

11 BROWDER(BELLE)

12 BROWDER(BELLE)

13 Taming of φ 3 (γ) DAWNING OF THE AGE OF PRECISION DRIVE FOR A PRISTINE DETERMINATION of the UT (ie all 3 with NO THEORETICAL INPUT)

14 Abe(BELLE)

15 From x ± and y ± to γ and r B Schune(BABAR) frequentist distillery Similar results using a bayesian distillery 95%CL D 0 K 68.3%CL D* 0 K Stat Syst Dalitz [ ] 2 σ excursion σ is to be understood in term of proj of a L in 5D. See Nicola s talk

16 Asner

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20 Asner

21 BELLE(LOI)

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23 BASIC ADS: prl97

24 Taming Direct CP #ofmodes D 0 (bar D 0) #Obs #unknowns N 2N N ad infintum

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28 Generalization to Multibody Modes and Inclusive Decays

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32 Atwood CKM 05

33 The Gronau-London-Wyler approach Measures γ from the interference of the b ucs ( Vub) and the amplitudes: K * V us u ( ) s V b cb c (*) 0 B u u D Colour favoured b c amplitude a = A 0 * ( B D K ) V V cb us f CP B Colour suppressed b u amplitude A( B b u D 0 K V ub * V cs ) V ub u c s u V * cs D K = ar b cus (*) 0 (*) B f CP e e iδ iγ The angle γ appears here Crucial parameter for the sensitivity on γ (see later) 0 A( B D K ) V ub V cs r B = = f ~? ( ) 0 COL A( B D K ) V V cb us Strong phase between diagrams 4 observables (3 indep. rel.) vs. 3 unknowns: r B, δ and γ + + Γ( B DCP± K ) + Γ( B DCP± K ) 2 R CP± = = 1+ rb ± 2r Γ( B D K ) Γ( B D K ) Γ( B D K ) A 0 B cosδ cosγ + + CP± CP± CP± = = ± 2r + + B sin δ sin γ / CP± Γ( B DCP± K ) + Γ( B DCP± K ) Matteo Rama (Babar) R

34 Rama(BABAR) GLW method : resultsa 2σ 2σ cut cut on on θ θ C C B ± D 0 K ± D CP + K K,π π CP+ DCP K S π in in these these plots plots N = 95 ±15 = 76 ± 13 N CP B D 0 CP K 0 B D CP π B ± D 0 K ± BB B ± D 0 K* ± BB hep-ex/ , PRL92,202002, (2004) R CP+ = 0.87±0.14(stat.) ±0.06(syst.) R CP = 0.80±0.14(stat.) ±0.08(syst.) hep-ex/ R CP+ = 1.73±0.36(stat.) ±0.11(syst.) R CP = 0.64±0.25(stat.) ±0.07(syst.) A CP+ = 0.40±0.15(stat.) ±0.08(syst.) A CP = 0.21±0.17(stat.) ±0.07(syst.) Includes B DKsπ NR contribution: see discussion later A CP+ = 0.08±0.20(stat.) ±0.06(syst.) A CP = 0.35±0.38(stat.) ±0.10(syst.) B ± D* 0 K ± BB hep-ex/ sub. to PRL R CP+ = 1.06±0.26(stat.) (syst.) A CP+ = 0.10±0.23(stat.) (syst.)

35 Rama(BABAR) hep-ex/ ADS method : results BB + 0 B D K + N R ADS = = any ± 1 σ δ D r D 48 < γ < 73 B D* [ D π ] K + N R ADS = = Any δ Any γ B D* + 0 [ D γ ] K + N R ADS = = DK : r B < 0.23 (90% C.L.) D*K : (r B* ) 2 < (0.16) 2 The The smallness smallness of of r B r makes B makes the the extraction extraction of of γγwith with the the GLW/ADS GLW/ADS methods methods difficult difficult

36 ama(babar) SCENARIO A) (rb=0.10) Sensitivity to γ of GLW with very large data Dalitz only samples Dalitz + GLW σ(γ): 19.1±0.4 σ(γ): 17.3±0.4 γ extracted γ extracted Using a different model for Dalitz errors (σ(γ) prop. to 1/rb): RMS(γ)=25.4 o 18.5 o Dalitz only Dalitz + GLW SCENARIO B) (rb=0.15) σ(γ): 13.3±0.3 σ(γ): 11.6±0.3 γ extracted γ extracted Using a different model for Dalitz errors (σ(γ) prop. to 1/rb): RMS(γ)=14.8 o 11.5 o

37 ADS projections The search for B - D ( * )0 [K + π - ]K - decays (BaBar and Belle) has not shown evidence of signal so far The expected number of B - D 0 [K + π - ]K - signal events on 1ab -1, assuming a 10% reco. efficiency and γ=65 o, is: rb=0.10: Nsig = σ from 0 (including bkg) rb=0.15: Nsig = σ from 0 (including bkg) same stat. significance for R ADS the ADS modes should help in constraining γ Rama(BABAR)

38 Status of GLW/ADS analysis in BaBar B - D 0 K - GLW: ICHEP04 conf. paper (hep-ex/ ), updated result with more CP-odd states soon CP-even: K + K -, π + π - ; CP-odd: K s π 0 B - D* 0 K - GLW: ICHEP04 conf. paper (hep-ex/ ), submitted to PRL CP-even: K + K -, π + π - B - D 0 K* - GLW: ICHEP04 conf. paper (hep-ex/ ) CP-even: K + K -, π + π - ; CP-odd: K s π 0, K s φ, K s ω B - D ( * )0 K - ADS: ICHEP04 conf. paper (hep-ex/ ), journal submission imminent B - D 0 K *- ADS: work in progress Matteo Rama

39 Trabelsi(BELLE)

40 Trabelsi(BELLE)

41 Trabelsi(BELLE)

42 Trabelsi(BELLE)

43 Karim Trabelsi(BELLE)

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45 K. Abe(BELLE)

46 BELLE

47 ABE(BELLE)

48 Abe(BELLE)

49 BaBar analysis B ± D 0 K γ r B δ 227 million of BB pairs at Υ(4S) B ± D* 0 K D* 0 D 0 π B ± D* 0 K D* 0 D 0 γ γ γ r B * r B * δ* δ*+180 (*) Tight kaon identification and E <30 MeV low Dπ contamination. Discrimination between BB and qq : Fisher discriminant using shape variables D 0 K D* 0 K D* 0 D 0 π D* 0 K D* 0 D 0 γ Signal Dπ BB qq B ± D 0 K B ± D* 0 K D* 0 D 0 π B ± D* 0 K D* 0 D 0 γ 282±20 signal events 90±11 signal events 44±8 signal events (*) as pointed out by A. Bondar and T. Gershon hep-ph/ Schune(Babar) Fairly standard and simple selection. 5

50 D 0 Dalitz model f(m 2 +,m 2 -) extracted from a sample of tagged (using D *± ) D 0 events m 2 + (GeV2 /c 4 ) 91.5 fb -1 : ~81k events Masses and widths fixed to PDG2004 values except for σ and σ (fitted) 13 distinct resonances + NR term m 2 - (GeV2 /c 4 ) m 2 - (GeV2 /c 4 ) m 2 + (GeV2 /c 4 ) Schune(BABAR) Sum of fit fraction : 1.24

51 From x ± and y ± to γ and r B Schune(BABAR) frequentist distillery Similar results using a bayesian distillery 95%CL D 0 K 68.3%CL D* 0 K Stat Syst Dalitz [ ] 2 σ excursion σ is to be understood in term of proj of a L in 5D. See Nicola s talk

52 WG5:Written Report Convernors plan to circulate a report by 5/15/05

53 Summary (1 of 2) 1. Light in the tunnel of φ 3 (γ) δφ 3 Now ITE 20,10,10 9,7,7 5<->2 ~ (sin2β) ~.037 ~.028 ~ Must Strive for a PRISTINE determination of all 3 angles w/o theory input to the level of ITE ITE is the HOLY GRAIL SUPER B is essential for this goal

54 Summary(2 of 2) I. Pond to West: Why follow the HG? ITE provides great opportunity to nail down Fundamental parameters of SM-CKM to unprecedented precision Most likely we will need all the precision we can muster to search for New phase(s) BSM phase(s) essentially guranteed, but in light of BF results, even if NP is O(1),its effect on B-physics need not be large. Remember m ν.had to go down 3-4 orders of magnitude II. Pond (way east) why SBF in LHC (499 pound gorrilla) era? (a) Gorrilla may have tough time looking for needle(s) (b) For sure (many) fake SUSY s will be found.sbf will greatly help in eliminating the fakers CFI : BF ~ SBF :LHC..SBF will greatly extend the reach of LHC LHCb unlikely to be able to cover all important bases..