Mikihiko Nakao (KEK) June 16th, 2006, SUSY06, Newport Beach, CA.

Transcription

1 at BELLE and BABAR. Mikihiko Nakao (KEK) June 16th, 26, SUSY6, Newport Beach, CA

2 Huge number of coherent / energy-asymmetric BB production at Y(4S) slow π e / µ K B or B (flavor tag) J/ψ (e + e / µ + µ ) CKM Matrix V CKM = V ud V cd V us V cs V ub V cb Unitarity (V ub * V ud +V cb * V cd + V tb * V td = ) Mikihiko Nakao p.2 e (8 or 9 GeV) A CP ( t) = B B B + B Penguins b V * qb e + (3.5 or 3.1 GeV) W ± u,c,t V qs more B s,d b t = z = π ν z measurement t = z / c β γ more B???? Y X s,d Reconstruction (CP eigenstate) K S (π + π ) sin2φ1 or sin2β Experimetnal dilution B πlν, ρlν, B X u lν, etc V ud V ub * B DK, B Dπ, etc V td φ 3 V ts φ 2 V tb Non-zero area = CP violation Phase? B ππ, ρπ,ρρ, etc V cb *V cd V tb *V td m, B ργ, etc Triangle φ 1 B J/ψK S, etc B D (*) lν,b X c lν Time-dependent CP violation (sine) / Direct CPV (cosine) Rare decays (penguins) sensitivity to new physics!

3 Integrated Luminosity (pb -1 ) Mikihiko Nakao p.3 Integrated Luminosity (pb -1 ) (/day) 26/6/ x 1 2 all data, on resonance, off resonance, energy scan /23/1999 3/9/21 1/24/23 12/1/24 1/27/26 Belle log total : pb -1 Date Peak (world highest) L > cm 2 s 1 > 6 fb 1 collected ( 6 M BB) Analyzed up to 414 fb 1 (will update at ICHEP6)

4 Mikihiko Nakao p.4 Peak L > cm 2 s 1 > 35 fb 1 collected ( 35 M BB) Analyzed up to 211 fb 1 (will update at ICHEP6)

5 Mikihiko Nakao p.5 Comparisons with precisely known SM (this talk) CP phase in penguins: φ 1 /β in b s vs b c Radiative and leptonic decays: B X s γ, B τν,... Wilson Coefficients from b sl + l Unitarity triangle

6 Mikihiko Nakao p.5 Comparisons with precisely known SM (this talk) CP phase in penguins: φ 1 /β in b s vs b c Radiative and leptonic decays: B X s γ, B τν,... Wilson Coefficients from b sl + l Unitarity triangle Prohibited/heavily suppressed cases in SM (not in this talk) Lepton flavor violation (τ physics): τ µγ,... c u FCNC (charm physics): D -D mixing, CPV,...

7 Mikihiko Nakao p.5 Comparisons with precisely known SM (this talk) CP phase in penguins: φ 1 /β in b s vs b c Radiative and leptonic decays: B X s γ, B τν,... Wilson Coefficients from b sl + l Unitarity triangle Prohibited/heavily suppressed cases in SM (not in this talk) Lepton flavor violation (τ physics): τ µγ,... c u FCNC (charm physics): D -D mixing, CPV,... Right handed b sγ coupling: t-dep. CPV in B K S π γ Dramatically enhanced cases with new physics (not in this talk) B Kµ + µ /B Ke + e for large tan β,... Deviations from reasonably known SM (not in this talk) Longitudinal polarization fraction of charmless B VV Factorization, etc: e.g. A CP (B K + π ) vs A CP (B K + π )

8 Mikihiko Nakao p.6 Penguins dummy text dummy text dummy text dummy text

9 W ± H ± χ ± b V * qb V qs s b V *?? V?? s b V *?? V?? s Mikihiko Nakao p.7 u,c,t u,c,t Flavor Changing Neutral Current: indirect search for non-sm contributions No SM tree diagram: new physics can compete Branching fraction? b sγ, b sl + l ~ ~ ~ u,c,t CP phase? comparison with SM sin 2(φ 1 /β) from b c SUSY: flavor structure? Minimal flavor violation (CKM like SUSY)? Large SUSY phase (new flavor structure)? Sensitivity beyond TeV scale: scenarios other than SUSY?

10 A CP ( t) = Γ(B f CP ) Γ(B f CP ) Γ(B f CP ) + Γ(B f CP ) = ξ f S sin( m t)+a cos( m t) [or C cos( m t)] If no new phase, S from b s = sin 2(φ 1 /β) from b c Mikihiko Nakao p.8 Pure b sss (no tree): B φk, B K S K S K d B More modes b qqs: b B η K, B f K, B π K, B π π K, B ωk, B ρ K, B K + K K V * td t V tb V tb t V * td b V * tb t W V ts s s s d φ K Corrections: non-zero SM phases u-loop penguin (V ub ), b uus (V ub, tree) Predictions: deviation is not large and positive

11 Mikihiko Nakao p.9 Raw Asymmetry Belle B φk S Belle B φk L t(ps) 7.5 Asymmetry (ξ f = 1 for φk S, ξ f = +1 for φk L ) BaBar B φk S BaBar B φk L t (ps) Belle S =.44 ±.27 ±.5 A =.14 ±.17 ±.7 BaBar S =.5 ±.25 ±.6 A =. ±.23 ±.5 HFAG S =.47 ±.19 A =.9 ±.14 Heavy Flavor Averaging Group Belle s S used to be 1: now Belle/BaBar in agreement 1σ below sin 2(φ 1 /β) = S ccs =.69 ±.3 Golden mode: small extra SM phase

12 Mikihiko Nakao p.1 Raw Asymmetry Belle B η K S Belle B η K L t(ps) Asymmetry (ξ f = 1 for η K S, ξ f = +1 for η K L ) BaBar B η K S BaBar B η K L t (ps) Belle S =.62 ±.12 ±.4 A =.4 ±.8 ±.6 BaBar S =.36 ±.13 ±.3 A =.16 ±.9 ±.2 HFAG S =.5 ±.9 A =.7 ±.7 Naive average is 2σ below sin 2(φ 1 /β) = S ccs =.69 ±.3 High statistics: second Golden mode

13 Mikihiko Nakao p.11 b ccs η K φ K f K S ω K π S K S π π K S K + K - K ρ K S K S K S K S HFAG Moriond 26 HFAG HFAG Moriond 26 HFAG Moriond HFAG 26 HFAG Moriond 26 Moriond HFAG 2 Moriond 26 World Average.69 ±.3 BaBar.5 ± Belle.44 ±.27 ±.5 Average.47 ±.19 BaBar.36 ±.13 ±.3 Belle.62 ±.12 ±.4 Average.5 ±.9 BaBar ±.1 Belle.47 ±.36 ±.8 Average.75 ±.24 BaBar ±.4 Belle.22 ±.47 ±.8 Average.31 ±.26 BaBar -.84 ±.71 ±.8 Average -.84 ±.71 BaBar ±.2 Moriond 26 HFAG HFAG Moriond 26 Moriond 26 HFAG Moriond 26 PRELIMINARY Belle.95 ± Average.64 ±.3 BaBar.17 ±.52 ±.26 Average.17 ±.58 BaBar.41 ±.18 ±.7 ±.11 Belle.6 ±.18 ± Average.51 ± BaBar ±.4 Belle.58 ±.36 ±.8 Average.61 ± S b s sin 2(φ 1 /β) eff In general, Agree with SM Lower than SM? Summer 6 update will be soon there!

14 Mikihiko Nakao p.12 Leptonic and Radiative B Decays e.g. charged Higgs

15 Mikihiko Nakao p.13 b u V * ub B(B τ ν τ ) = W ( G 2 F m Bm 2 )2 τ 8π τ ν f 2 B V ub 2 τ B Signal: full recon of other B (ɛ =.3%) τ (µνν, eνν, πν, ππ ν, πππν) no extra energy in calorimeter B(B τ ν τ ) = ( Events /.1 GeV Belle E ECL (GeV) events, 4.2σ ) 1 4 (preliminary) (cf. SM: (1.59 ±.4) 1 4 )

16 2 b H? τ 1.5 u ν r H 1.5 2σ allowed Mikihiko Nakao p.14 B(B τ ν τ ) = B SM (B τ ν τ ) r H r H = ( 1 m2 B m 2 H tan 2 β )2 = Direct measurement of tan β/m H + will be possible if r H 1! Large area of m H -tan β space is excluded! Current uncertainties: B (18%), f B (1%), V ub (8%) ) 2 Mass (GeV/c ± H tan β / m 6 Belle LEP Excluded (95% C.L.) tan β ± BB (95.5% C.L.) excluded Tevatron Run I Excluded (95% C.L.)

17 Mikihiko Nakao p.15 Many constraints to new physics E γ cut is needed ( GeV) Extrapolated to E min γ (1.6 GeV) Recently model error reduced to 1% with HQE parameters from spectra -1 CLEO [9.1 fb ] PRL87,25187(21) -1 BaBar [81.5 fb ] PRD72,524(25) -1 BaBar [81.5 fb ] hep-ex/571-1 Belle [5.8 fb ] PLB511,151(21) -1 Belle [14 fb ] PRL93,6183(24) Average HFAG hep-ex/633 Buras Czarnecki Misiak Urban (NPB631:219,22) BF(B X s γ)x1-4 (3.29±.53)x )x1-4 ( (3.92±.57)x1-4 (3.69±.95)x1-4 (3.5±.44)x1-4 (3.55±.26)x1 Branching Fraction / 1 MeV.2 1 B(B X s γ; E γ > 1.6 GeV) = (355 ± Events/1 MeV Belle E* γ [GeV] Data Kinetic scheme Shape Function scheme BABAR E γ (GeV) ± 3) 1 6 Very consistent with NLO SM expectations, e.g., (357 ± 3) 1 6

18 Mikihiko Nakao p.16 m H + bounds as a function of B and δb (5 year old plot) σ (BR γ exp ) x Moriond hep-ex/1832 M H >2 GeV TODAY! exp 4 BR γ x 1 Lower limit on type-ii charged Higgs mass for any tan β m H+ > 3 GeV (if no other destructive SUSY amplitudes) Previous limit was higher since the measured rate was lower than prediction (This plot is made for B th = 3.73 ±.31) Expected improvements: Measurements: more data (current results are based on 1/4 of full dataset for both Belle/BaBar) Theory: NNLO calculations are coming

19 Mikihiko Nakao p.17 Wilson Coefficients from Electroweak B Decays

20 H eff = 4G F V 2 ts V 1 tb i=1 C O 7 EM penguin operator io i O 9 semileptonic vector operator O 1 semileptonic axial-vector operator Mikihiko Nakao p.18 b b sγ t γ t γ / Z s b s b t s C 7 C 7, C 9, C 1 Γ(b sγ) = G2 F α emm 5 b 32π 4 l + l V tsv tb 2 ( C eff /m b, 1/m c corr. ) W W ν l + l b sl + l (ŝ = q 2 /m 2 b ) dγ(b sl + l ) dŝ [ (1 + 2ŝ) ( ( C eff C eff 1 2) ŝ ) C eff Re ( ) ] C eff 7 Ceff 9 + corr. New physics may drastically change Wilson coefficients: C i C SM i Measurements can diagnose type of new physics + C NP i

21 Xs l+l- Entries/(.33GeV/c 2 ) Entries/bin (a) Entries/bin (b) Mikihiko Nakao p M bc (GeV/c 2 ) M xs (GeV/c2) Belle B(B X s l + l ) = (4.11 ± ) BaBar B(B X s l + l ) = (5.6 ± 1.5 ± 1.3) 1 6 HFAG B(B X s l + l ) = ( ) 1 6 SM: (4.2 ±.7) 1 6 eff C 1,NP q2 (GeV/c)2 allowed (9% CL) C 9 and C 1 from B(B X s l + l ) (with C 7 from B(B X s γ)) - 3 SM eff C 9,NP

22 Mikihiko Nakao p.2 Forward-backward asymmetry (A FB ) in b sl + l due to interference between γ and weak couplings A FB (bkg-sub) A FB (B K l + l ) = C 1 ξ(q 2 ) C 9,C 1 sign-flipped C 1 sign-flipped C 9 sign-flipped best-fit q 2 GeV 2 /c 2 Belle A FB =.5 ±.15 ±.2 (3.4σ) (best-fit is SM-like) A FB B l+l- rest frame l+ [Re(C 9 )F 1 + 1q 2C 7F 2 ] l q 2 (GeV /c ) BaBar A FB B l- l+ >.55 (95% CL) (first bin excludes SM at 2σ?)

23 Mikihiko Nakao p.21 Fit with A 9 /A 7 and A 1 /A 7 (A i is leading term of C i ) A 9 /A 7 = ± (SM: -12.3) best fit in quadrant II A 1 /A 7 = ± (SM: +12.8) (SM-like) A 7 =.33 (fixed) < A 9A 1 A 2 7 < 26.4 A 9 A 1 is negative at 98.2% CL A 1 /A Large new physics parameter space is excluded -4 4σ 5σ 3σ best fit 2σ 1σ (a) negative A 7 SM A 9 /A 7

24 Mikihiko Nakao p.22 A FB MC 5 ab q 2 GeV 2 /c 2 With 5 ab 1, δa 9 /A 9 11%, δa 1 /A 1 13% (now 2 5%) C 9, C 1 flip case (or SM-like case) will be excluded With 5 ab 1, δa 9 /A 9 δa 1 /A 1 4%

25 Mikihiko Nakao p.23 CKM Matrix V CKM = V ud V cd V td Status of Unitary Triangle V us V cs V ts V ub V cb V tb Unitarity (V ub * V ud +V cb * V cd + V tb * V td = ) B πlν, ρlν, B X u lν, etc V ud V ub * B DK, B Dπ, etc φ 3 φ 2 B ππ, ρπ,ρρ, etc Non-zero area = CP violation V cb *V cd V tb *V td m, B ργ, etc φ 1 B J/ψK S, etc B D (*) lν,b X c lν

26 Mikihiko Nakao p.24 d B b V * td t V tb V tb t V * td BaBar b PRL 94, (25) Belle hep-ex/5737 Average HFAG V * cb V cs sin(2β)/sin(2φ 1 ) c J/ψ, ψ,... c s K.722 ±.4 ± ±.39 ±.2 d.685 ± d B b V * td t V tb V tb t V * td b u, c, V * qb t V qs c J/ψ, ψ,... c s K d No CP phase unless q=u Golden mode: B J/ψK more modes: ψ K S, χ c1k S, η ck S, J/ψK φ 1 /β = ( ) 2-fold ambiguity resolved by cos 2(φ 1/β) using B D π Dalitz and B J/ψK angular analysis

27 d B b V * td t V tb V tb t V * td b V * ub V ud u d u d π + / ρ + π / ρ d B b V * td t V tb V tb t V * td b V * qb u, c, t V qs d u u d π + / ρ + π / ρ Mikihiko Nakao p.25 (isospin analysis) Belle B ρρ: φ 2 = (88 ± 17) BaBar B ρρ: α = (1 ± 13) B ππ: not stringent bound due to large penguin (Dalitz analysis) BaBar B ρπ: α = ( ± 6) 1 CL C K M f i t t e r FPCP 6 CKM fit no α meas. in fit Different weak phase (if not a u-loop) B ππ B ρπ B ρρ WA Combined all info combined: φ 2 /α = ( ) α (deg)

28 Mikihiko Nakao p.26 b B + u V * cb V us s K + u c D u s d u d d u K S Phase of tree (V ub ): direct CPV π π + B DK, D K ππ Dalitz S Ratio of two amplitudes: r B b B + u V * ub r V cs.3.2 u D c s + K u Belle D K u d d u d s π π + K S Strong phase difference: δ B Weak phase diff.: φ 3 /γ φ 3 (degrees) combined for D K, D K and D K, need great care to average Belle/BaBar φ 3 = ( ± 3 ± 9) Belle 386 MBB hep-ex/6454 γ = (67 ± 28 ± 13 ± 11) BaBar 223 MBB hep-ex/5711

29 Heavy Quark Expansion in 1/m b and α S Γ(B X c l ν) = G2 F m5 b 192π 3 V cb 2 [(1 + A EW )A nonpert A pert ] Mikihiko Nakao p.27 E l and M X spectra moments HQE parameters (m b, µ 2 π,... ) These are universal and can be measured from B X s γ, too! Global fit with Kinetic scheme (hep-ph/57253) m b = 4.59 ±.25 ±.3 GeV (b quark mass) µ 2 π =.41 ±.19 ±.35 GeV 2 (Fermi mom.) 2 V cb = (41.96 ±.23 ±.35 ±.59) 1 3 B X s γ only From both B X c l ν only (exp) (HQE) (ΓSL) 2% precision in V cb!

30 Limited E l, q 2 and M X range can be measured (huge B X c l ν) Model (extrapolation): shape function (BLNP), dressed gluon (DGE),... Mikihiko Nakao p.28 CLEO (endpoint) 4.9 ±.48 ±.36 BELLE (endpoint) 4.82 ±.45 ±.3 BABAR (endpoint) 4.41 ±.29 ±.31 BABAR (E, q 2 ) e 4.1 ±.27 ±.36 BELLE m X 4.6 ±.27 ±.24 BELLE sim. ann. (m, q 2 ) X 4.37 ±.46 ±.29 BABAR (m, q 2 ) X 4.75 ±.35 ±.32 Average +/- exp +/- (mb,theory) 4.45 ±.2 ±.26 χ 2 /dof = 5.5/ 6 (CL = 48.7) OPE-HQET-SCET (BLNP) Phys.Rev.D72:736,25 input from b c l ν and b s γ moments m b HFAG Winter V [ 1 ] ub HFAG Ave. (BLNP) 4.45 ±.2 ±.26 HFAG Ave. (DGE) 4.41 ±.2 ±.2 BABAR (LLR) hep-ph/ ±.45 ± V ub [ 1 V ub = (4.4 ±.3) 1 3, 7% error V ub from exclusive: 2% error, no attempt to combine so far HFAG Winter 26-3 ]

31 Mikihiko Nakao p.29 Similar to b sγ in SM but new physics could be quite different First b dγ observation by Belle (B ρ γ, B ρ γ, B ωγ combined) Entries/(2 MeV) 1 5 B (ρ,ω)γ E (GeV) B(B (ρ, ω)γ) = ( V td V ts = ) 2 Entries/(2 MeV/c ) (independent check of V td besides B s mixing, V td /V ts = from m s) B (ρ,ω)γ (GeV/c ) η M bc % prob. intervals BR(B ρ γ) * BR(B K γ) m d m s

32 Mikihiko Nakao p.3 η ε K β UTfit group V ub V cb m γ m d s α md Beautiful consistency with CKM! ρ η excluded area has CL >.95 sin 2φ 1 ε K V ub /V cb C K M f i t t e r FPCP 6 CKM fitter group φ 2 φ 3 φ 3 φ 3 φ 2 excluded at CL >.95 sol. w/ cos 2φ 1 < (excl. at CL >.95) ρ φ1 φ 2 m d m s & m d All 3 angles / 3 sides are there just need to reduce errors The largest possible deviation between φ 1 /β and V ub ε K

33 SuperKEKB LoI 1 φ 3 Mikihiko Nakao p.31 η -1 V ub /V cb? C K M f i t t e r p a c k a g e m d φ 2 sin2φ ρ 5 ab 1 at Super-B real precision test of consistency Many programs at (Super)B-Factory

34 SuperKEKB LoI SuperKEKB LoI with S φk =.5 1 φ 3 1 φ 3 Mikihiko Nakao p.31 η -1 V ub /V cb? C K M f i t t e r p a c k a g e m d φ 2 sin2φ 1 η or -1 V ub /V cb!!!? C K M f i t t e r p a c k a g e m d φ 2 sin2φ ρ ρ 5 ab 1 at Super-B real precision test of consistency Many programs at (Super)B-Factory flavor structure of new physics may be very rich!

35 Backup slides Mikihiko Nakao p.32

36 Mikihiko Nakao p.33 Huge amount of clean B and B + decays Sensitive to very rare decays (O(1 7 ) branching fractions) Detailed study of rare decays (O(1 5 ) branching fractions) Precision measurements of decays (O(1 3 ) branching fractions) Time-dependent CP violation Dalitz analysis very new! (δz and flavor-tag) Full-reconstruction (B beam) (need lot of L) All final state particles (π, K, e, µ, p, γ (π ), K L, even ν!) Variety of B decay measurements for new physics hunting

37 Mikihiko Nakao p.34 φ K f K S η K π K S π π K S ω K S ρ K S K + K - K K S K S K S HFAG Moriond 26 HFAG f HFAG HFAG HFAG HFAG HFAG Moriond 26 Moriond 26 Moriond 26 BaBar. ±.23 ±.5 Belle -.14 ±.17 ±.7 Average -.9 ±.14 BaBar -.16 ±.9 ±.2 Belle.4 ±.8 ±.6 Average -.7 ±.7 BaBar -.24 ±.31 ±.15 Belle.23 ±.23 ±.13 Average.6 ±.21 BaBar.6 ±.18 ±.3 Belle -.11 ±.18 ±.8 Average -.2 ±.13 BaBar.27 ±.52 ±.13 Average.27 ±.54 BaBar ±.3 Belle -.19 ±.39 ±.13 Average -.44 ±.23 BaBar.64 ±.41 ±.25 Average.64 ±.48 BaBar.23 ±.12 ±.7 Belle.6 ±.11 ±.7 Average.14 ±.1 BaBar -.1 ±.25 ±.5 Belle -.5 ±.23 ±.6 Average -.31 ±.17 Moriond 26 Moriond 26 HFAG Moriond f HFAG Moriond 26 Moriond 26 PRELIMINARY C b s

38 Mikihiko Nakao p.35 cos 2(φ 1 /β) from B J/ψK angular analysis (mixed CP) cos 2φ 1 =.56 ±.79 ±.11 (Belle 275 MBB, PRL95,9161(25)) cos 2β = ±.27 (BaBar 88 MBB, PRD71,325(25)) cos 2φ 1 from B D π with D K ππ Dalitz analysis S cos 2φ 1 = (Belle 386 MBB hep-ex/6523) η φ 1 /β = ( ) 1 β/φ 1 β/φ 1 = ( ) β/φ 1 = ( ) H F A G H F A G LP 25 PRELIMINARY DISFAVOURED BY J/ψK* & Dh ρ

39 Mikihiko Nakao p.36 r φ 3 (degrees) a) 1 (deg) γ -1 r B Dalitz analysis of B D ( ) K ( ), D K S π+ π, to disentangle φ 3 /γ, δ and r B altogether (Many other proposed methods, none of them are as powerful) combined for D K, D K and D K φ 3 = ( ± 3 ± 9) γ = (67 ± 28 ± 13 ± 11)

40 Inclusive B X u l ν Rate can be directly converted into V ub Huge B X c l ν Mikihiko Nakao p.37 Limited q 2 and M X range can be measured Cut variables: E l (endpoint), M X, q 2,... Model (extrapolation): shape function (SF), dressed gluon (DGE),... Exclusive B πl ν, B ρl ν, B ωl ν Clear signal, full q 2 range (and dep.) can be measured Methods: untag, semileptonic tag, full-recon tag Form factor not precisely known, only in limited q 2 (high q 2 ( >16 GeV 2 ) from Lattice, low q 2 ( <14 GeV 2 ) from light cone sum rule)

41 Mikihiko Nakao p BABAR SL tag: B π l ν 2τ /τ ±.68 ± BABAR Breco tag: B π l ν 2τ /τ ±.41 ±.21 BELLE SL tag: B 1.37 ±.24 ± π l + BABAR SL tag: B π - l 1.2 ±.25 ±.13 BELLE SL tag: B 1.46 ±.2 ±.16 BABAR Breco tag: B - + π l ν 2τ /τ π l ν 1.14 ±.27 ±.17 + CLEO untagged: B π l ν 1.32 ±.18 ±.13 + BABAR untagged: B π l ν 1.38 ±.1 ± Average: B π l ν 1.34 ±.8 ±.8 ν ν Ball-Zwicky full q ± HPQCD full q ± FNAL full q ± APE full q ± χ 2 /dof = 8.4/ 7 (CL = 3.1) -2 2 B(B - π l + HFAG Winter 26 ν ) [ 1-4 ] 2 4 V ub HFAG Winter 26 [ 1-3 ]