1 / 54

Recent results on D 0 m ixing from Belle

Recent results on D 0 m ixing from Belle. Lepton Photon Interactions 2007. B. Golob University of Ljubljana Belle Collaboration. Outline Introduction Phenomenology Measurement s K + K - / p + p - K S p + p + CPV 4. Prospects & Summary. B. Golob, Belle.

keaton-davenport
Download Presentation

Recent results on D 0 m ixing from Belle

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Recent results on D0mixing from Belle Lepton Photon Interactions 2007 B. Golob University of Ljubljana Belle Collaboration • Outline • Introduction • Phenomenology • Measurements • K+K-/p+p- • KSp+p+ • CPV • 4. Prospects & Summary B. Golob, Belle D0 Mixing 1 Lepton Photon ‘07, Daegu

  2. → D0-D0 Mixing Introduction U(4S): s(c c)  1.3 nb (Belle luminos.:~850·106 XcYc pairs) Dual role of charm - experimental tests of theor. predictions (most notably of (L)QCD); improve precision of CKM measurements (B physics); - standalone field of SM tests and search for new phenomena (SM and/or NP) E. Golowich et al., arXiv:0705.3650 mb’=500 GeV 21 different NP models: 17 of those→ constraints in parameter space from established D0 mixing rate <~10-4 example: mixing ampl. mb’=200 GeV 4th fermion family (severly constrained from other measurements as well) |Vub’Vcb’| B. Golob, Belle D0 Mixing 2 Lepton Photon ‘07, Daegu

  3. Central Drift Chamber e+3.5 GeV 3(4) layer Si det. e-8 GeV Aerogel Cherenkov (n=1.015-1.030) m and KL Counter (14/15 layers RPC+Fe) EM calorimeter CsI (16X0) 1.5T SC solenoid Introduction 700 fb-1 Ldt 2000 2007 D0→ K-p+ D*+→D0p+slow, D0→K-p+ e(K±) ~ 85% e(p±→K±)  10% for p < 3.5 GeV/c <st>/t(D0) ~ 1/2 st/ t(D0)=1/3 st/t(D0) DM=M(Kppslow)-M(Kp) B. Golob, Belle D0 Mixing 3 Lepton Photon ‘07, Daegu

  4. q2 q1 Decay time distribution of experimentally accessible states X0, X0sensitive to mixing parameters |x|, |y| <O(10-2) ~ D0 - D0 Phenomenology q2 q1 X0 X0 Mixing phenomena X0 = K0, Bd0, Bs0 and D0 t-dependent Schrödinger eq.: mass eigenstates: decay time evolution: CP eigenstates if q/p=1; propagate in t according to distincteigenvalues; I.I. Bigi, N. Uraltsev, Nucl. Phys. B592, 92 (2001);A.F. Falk et al., PRD69, 114021 (2004) B. Golob, Belle D0 Mixing 4 Lepton Photon ‘07, Daegu

  5. Measurements Belle measurements - semileptonic decays, D0→ K(*) l n - hadronic decays to non-CP final state D0→ K+p- - hadronicdecays to multi-body final state, D0→ KSp+p- - decays to CP final state, D0→ K+K-/p+p- PRD72, 071101 (2005), 253 fb-1 common: D*+ →D0ps+ charge of ps tags the flavor of initially produced D0; p*(D*) > 2.5 GeV/c eliminates D meson production from b → c selection determined “blindly” PRL96, 151801 (2006), 400 fb-1 arXiv: 0704.1000, 540 fb-1, subm. to PRL PRL 98, 211803(2007), 540fb-1 B. Golob, Belle D0 Mixing 5 Lepton Photon ‘07, Daegu

  6. PRL 98, 211803 (2007), 540fb-1 Measurements K+K- / p+p- D0→ K+K- / p+p- CP even final state; in the limit of no CPV: CP|D1> = |D1> measure 1/G1 side band S. Bergman et al., PLB486, 418 (2000) AM, : CPV in mixing and interference Signal M(K+K- ) , Q=M(K+K- ps)- M(K+K- )- M(p), st, selection optimized on MC B. Golob, Belle D0 Mixing 6 Lepton Photon ‘07, Daegu

  7. K-p+ PRL 98, 211803 (2007), 540fb-1 MeasurementsK+K- / p+p- Fit simultaneous binned likelihood fit to K+K-/K-p+/p+p- decay-t, common free yCP constructed using event-by-event st M sideband event-by-event st parameters of R depend slightly on data taking conditions t = 408.7±0.6 fs tPDG=410.1±1.5 fs B. Golob, Belle D0 Mixing 7 Lepton Photon ‘07, Daegu

  8. K+K-/p+p- and K-p+ratio PRL 98, 211803 (2007), 540fb-1 MeasurementsK+K- / p+p- c2/ndf=1.084 (ndf=289) Result + difference of lifetimes visually observable negligible CPV, yCP=y ±1 s 3.2 s from zero (4.1 s stat. only) evidence for D0 mixing (regardless of possible CPV) B. Golob, Belle D0 Mixing 8 Lepton Photon ‘07, Daegu

  9. arXiv: 0704.1000, 540 fb-1, subm. to PRL < f | D0 > M= < f | D0(t)> analogous Measurements KSp+p- t-dependent Dalitz analysis different decays identified through Dalitz analysis; CF: D0→ K*-p+ DCS: D0→ K*+p- CP: D0→r0 KS their relative phases determined (unlike D0→ K+p-); t-dependence: m±2 = m2(KSp±) l1,2=f(x,y); n.b.:K+p-:x’2, y’ < f | D0 > sum of intermediate states B. Golob, Belle D0 Mixing 9 Lepton Photon ‘07, Daegu

  10. arXiv: 0704.1000, 540 fb-1, subm. to PRL M signal rnd slow p combin. Measurements KSp+p- t Fit no CPV: fit M(m-2,m+2,t) to data distribution  x, y Signal M(KSp+p- ) and Q= M(KSp+p-ps)- M(KSp+p-)- M(p); 3 s signal region in M, Q Nsig= (534.4±0.8)x103 P95% Dalitz model 13 BW resonances, non-resonant contr.; comb. bkg.: from M sideband B. Golob, Belle D0 Mixing 10 Lepton Photon ‘07, Daegu

  11. arXiv: 0704.1000, 540 fb-1, subm. to PRL Measurements KSp+p- K*X(1400)+ Dalitz projection of fit K*(892)+ r/w K*(892)- test of S-wave pp contr. (f0, s1,2): K-matrix formalism Results (fit fractions, phases) in agreement with (measurement of f3) PRD73, 112009 (2006) B. Golob, Belle D0 Mixing 11 Lepton Photon ‘07, Daegu

  12. t [fs] 2-d 68% C.L. region arXiv: 0704.1000, 540 fb-1, subm. to PRL Measurements KSp+p- Decay-t projection of fit most sensitive meas. of x; comb. bkg. x = 1.8 ± 3.4 ± 0.6% y = -1.4 ± 2.5 ± 0.9 % Cleo, PRD72, 012001 (2005) 2-d 68% C.L. region t = 409.9±0.9 fs tPDG=410.1±1.5 fs D0→ K(*)ln D0→ K+K-/p+p- D0→ K+p- PRL 98, 211803 (2007), 540fb-1 PRL96, 151801 (2006), 400 fb-1 PRD72, 071101 (2005), 253 fb-1 B. Golob, Belle D0 Mixing 12 Lepton Photon ‘07, Daegu

  13. Measurements CPV CPV in D0 system first two generations involved: Wolfenstein parameter. CPV expected to be small in SM (singly Cabibbo supp. decays only) CPV in decay: CPV in mixing: CPV in interf. mix./decay: t distributions depend also on CPV parameters; x, y at upper limit of SM expectation →search for CPV; at current level of sensitivity positive signal clear indication of NP; B. Golob, Belle D0 Mixing 13 Lepton Photon ‘07, Daegu

  14. separate t for D0, D0 95% C.L. Measurements CPV CPV in D0 → K+K- / p+p- CPV in D0 → KSp+p- include |q/p|(AM) and  as additional free param. B. Golob, Belle D0 Mixing 14 Lepton Photon ‘07, Daegu

  15. D0 →p+p-p0 D0 →p+p-p0 540 fb-1, preliminary Measurements CPV CPV in D0 →p+p-p0 CPV in decay, integrated over t and Dalitz space Belle preliminary Cleo, PRD 72, 031102 (2005) B. Golob, Belle D0 Mixing 15 Lepton Photon ‘07, Daegu

  16. Measurements average Combination, no CPV all available meas.; observables (yCP, x, ...) → x, y, dKp , RD sum of likelihood curves, non-Gaussian shapes accounted for HFAG charm, http://www.slac.stanford.edu/xorg/hfag/charm/index.html B. Golob, Belle D0 Mixing 16 Lepton Photon ‘07, Daegu

  17. Measurements average Combination, CPV observables (AG, x, ...) → |q/p|, , AD, x, y, RD, dKp c2 minimization, non-Gaussian shapes not accounted for HFAG charm, http://www.slac.stanford.edu/xorg/hfag/charm/index.html B. Golob, Belle D0 Mixing 17 Lepton Photon ‘07, Daegu

  18. Prospects & Summary L = 5 ab-1L = 50 ab-1 s(x) 0.1% 0.07% s(y) 0.1% 0.07% s(AM)0.1 0.07 s(f) 0.1 rad 0.07 rad Super-B factory extrapolation of existing Belle results LHCb, 10 fb-1 (5 y): s(x’2)~6x10-5, s(y’)~0.9x10-3 s(yCP)~0.05% • Summary • 2007: D0 mixing established (slowest of all neutral mesons) • Belle presented first evidence for D0 mixing (yCP), most precise x meas.; confirmation in D0→ K+K-, KSp+p-,other sensitive modes? (esp. x, from Dalitz analyses, sign)? • combination of existing D0 mixing results: • established at ~5 s; x,y ~ O(10-2); s(x,y) ~ 0.3%; • observed mixing may (not) be arising from SM → • important CPV search • existing facilities: any CPV indication of NP • Super-B: allows to test CP asymmetries to few 10-4 (SM expectations) B. Golob, Belle D0 Mixing 18 Lepton Photon ‘07, Daegu

  19. → D0-D0 Mixing Introduction (bckup) √s = M(U(4S))c2= 10.58 GeV Physics of c-hadrons increased interest at B-factories in recent years B-factory, c-factory s(c c)  1.3 nb (~850·106 XcYc pairs) s(B B)  1.1 nb (~750·106 BB pairs) Dual role of charm standalone field of SM tests and search for new phenomena (SM and/or NP) experimental tests of theor. predictions (most notably of (L)QCD); improve precision of CKM measurements (B physics); B. Golob, Belle D0 Mixing 19 Lepton Photon ‘07, Daegu

  20. q2 q1 Phenomenology bckup q2 q1 Mixing phenomena in course of life neutral meson X0 can transform into anti-meson X0 X0 = K0, Bd0, Bs0and D0 t-dependent Schrödinger eq.: mass eigenstates: eigenvalues: X0 X0 CP eigenstates if q/p=1 B. Golob, Belle D0 Mixing 20 Lepton Photon ‘07, Daegu

  21. Vuj* Vci* Vcj Vui u c W+ D0 D0 d, s, b d, s, b W- c u if mi = mj  due to CKM unitarity: no D0 D0 mixing D0 - D0 Phenomenology(bckup) Mixing description observation of K0: 1950 (Caletch) mixing in K0: 1956 (Columbia) observation of Bd0: 1983 (CESR) mixing in Bd0: 1987 (Desy) observation of Bs0: 1992 (LEP) mixing in Bs0: 2006 (Fermilab) observation of D0: 1976 (SLAC) mixing in D0: 2007 (KEK, SLAC) (evidence of) 6 years 4 years 14 years 31 years d-like quarks in loop |Vcb*Vub|<< |Vcs*Vus|, |Vcd*Vud| mainly d,s contrib.; md ~ ms mixing small (as opposed to Bd0, where term with mt2 |Vtb* Vtd|2 dominates) B. Golob, Belle D0 Mixing 21 Lepton Photon ‘07, Daegu

  22. Vuj* Vci* Vcj Vui u c W+ D0 D0 d, s, b d, s, b W- u c K+ D0 D0 K- D0 - D0 Phenomenology(bckup) x and y in SM 2nd order perturb.: short distance: |x| ~ O(10-5) G. Burdman, I. Shipsey, Ann.Rev.Nucl.Sci. 53, 431 (2003) DCS SU(3) breaking absorptive part (real interm. states)  y dispersive part (off-shell interm. states)  x long distance: |x|, |y| ~ O(10-2) I.I. Bigi, N. Uraltsev, Nucl. Phys. B592, 92 (2001); A.F. Falk et al., PRD69, 114021 (2004) D0 mixing: rare process in SM; possible contrib. from NP B. Golob, Belle D0 Mixing 22 Lepton Photon ‘07, Daegu

  23. D0 - D0 Phenomenology(bckup) Oscillations ~ Bs0 more difficult to observe oscillations within t visually unobservable deviation from pure exponential B. Golob, Belle D0 Mixing 23 Lepton Photon ‘07, Daegu

  24. right sign (RS) PRD72, 071101 (2005), 253 fb-1 Semileptonic (bckup) • Semileptonic decays • Wrong charge combinations (WS): • D*+→ D0pslow+D0 → D0 → K(*)+e-n • no “DCS” decays  NWS/NRS = RM (x2+y2)/2 • Reconstruct n: • missing momentum with • kinematic constraints • Signal: • DM = M(Kenpslow) - M(Ken) NRS = (229.45 ± 0.69) ·103 B. Golob, Belle D0 Mixing 24 Lepton Photon ‘07, Daegu

  25. PRD72, 071101 (2005), 253 fb-1 Semileptonic (bckup) • Decay time: • reduce bkg., increase sensitivity; • <t >(bkg., RS) < <t >(mix. signal) • 6 bins in 1 < t < 10 Result: allowed RM = (0.20 ± 0.47 ± 0.14) ·10-3 RM < 1.2 · 10-3 95% C.L. dominating systematics from limited bkg. statistics (embedded pslow) B. Golob, Belle D0 Mixing 25 Lepton Photon ‘07, Daegu

  26. PRL96, 151801 (2006), 400 fb-1 D*+→ D0pslow+D0 → D0 → K+p- K+p-(bckup) 3s Q interval Wrong charge combinations (WS): WS DCS decays  interference t-dependence to separate DCS/mixed 3s M interval • Signal: • M=M(Kp) • Q = M(K p pslow) - M(Kp) - M(p) • 2D M-Q fit: WS NWS = 4024 ± 88 B. Golob, Belle D0 Mixing 26 Lepton Photon ‘07, Daegu

  27. PRL96, 151801 (2006), 400 fb-1 K+p-(bckup) WS t dist. Decay time: resol. function from RS t(D0) = 409.9 ± 0.7 fs x’2, y’, RD free parameters Results: RD = (3.64 ± 0.17 ) ·10-3 x’2 = (0.18 ±0.210.23) · 10-3 y’= (0.6 ±4.03.9) · 10-3 95% C.L. (x’2, y’) contour frequentist, FC ordering B. Golob, Belle D0 Mixing 27 Lepton Photon ‘07, Daegu

  28. PRL96, 151801 (2006), 400 fb-1 x’2 < 0.72 ·10-3 -0.99% < y’ < 0.68% no signif. CPV Measurements K+p-bckup 95% C.L. (x’2, y’) contour frequentist, FC ordering Results: RD = (3.64 ± 0.17 ) ·10-3 x’2 = (0.18 ±0.210.23) · 10-3 y’= (0.6 ±4.03.9) · 10-3 AD = (23 ± 47) ·10-3 AM = (670 ± 1200) ·10-3 no CPV CPV • CPV allowed: • separate D0 and D0 tags • (x’2,y’,RD) → (x’±2, y’±,RD±) (0,0) lies on 96.1% C.L. contour largest syst. due to p*(D*) selection B. Golob, Belle D0 Mixing 28 Lepton Photon ‘07, Daegu

  29. 1 s 2 s 3 s BaBar, hep-ex/0703020, 384fb-1, acc. to PRL K+p-BaBar comp. (bckup) Result RD = (3.03 ± 0.19) ·10-3 x’2 = (-0.22 ±0.37) · 10-3 y’= (9.7 ± 5.4) · 10-3 3.9 s including sys. error Comparison evidence for (x,y)  (0,0) consistent B. Golob, Belle D0 Mixing 29 Lepton Photon ‘07, Daegu

  30. 3 s Prospects bckup 1 s perspective (1 ab-1) x, y at upper limit of SM expectation  search for CPV; at current level of sensitivity positive signal clear indication of NP; s(x) ~ ±0.21% s(y) ~ ±0.17% B. Golob, Belle D0 Mixing 30 Lepton Photon ‘07, Daegu

  31. arXiv: 0704.1000 KSp+p-syst. (bckup) D0→ KSp+p- M(KSp+p- ) and Q= M(KSp+p-ps)- M(KSp+p-)- M(p); 3 s signal region in M, Q B. Golob, Belle D0 Mixing 31 Lepton Photon ‘07, Daegu

  32. arXiv: 0704.1000 KSp+p-syst. (bckup) D0→ KSp+p- model dependence [10-4]: Dx                 Dy -10.3           +0.1K*0(1430) DCS/CF -15% + 6.9           -2.5K*2(1430) DCS/CF -30% -1.6 -0.9 K*(1410) DCS & CF -20% -5.1 -4.1G(q2) const. --------------------------------- +10+6        Total model dep. -14-8 experimental: Dx           Dy +7.6         -7.8               p* variation -5.6         -5.7  Dalitz pdf for bkg. from different t bins ----------------------- +9+8 Total experimental-7          -12 Largest systematics observed discrepancy from input in MC statistical uncertainty: s(x)=29x10-4 s(y)=24x10-4 B. Golob, Belle D0 Mixing 32 Lepton Photon ‘07, Daegu

  33. arXiv: 0704.1000 KSp+p-syst. (bckup) D0→ KSp+p- Largest systematics model dependence [10-4]: Dx                 Dy -10.3           +0.1K*0(1430) DCS/CF -15% +12.5           -4.4K*2(1430) DCS/CF fixed to K*(892) -6.4 +5.0 K*(1410) DCS & CF fixed to K*(892) --------------------------------- +15 +8 +10+6        Total model dep. -16 -9-14-8 B. Golob, Belle D0 Mixing 33 Lepton Photon ‘07, Daegu

  34. arXiv: 0704.1000 KSp+p-param. (bckup) D0→ KSp+p-parameterization B. Golob, Belle D0 Mixing 34 Lepton Photon ‘07, Daegu

  35. arXiv: 0704.1000 KSp+p-param. (bckup) D0→ KSp+p- CP=+1 states parameterization as in Cleo, PRD 63, 092001 (2001) B. Golob, Belle D0 Mixing 35 Lepton Photon ‘07, Daegu

  36. arXiv: 0704.1000 KSp+p-param. (bckup) D0→ KSp+p- CP= -1 states parameterization as in Cleo, PRD 63, 092001 (2001) B. Golob, Belle D0 Mixing 36 Lepton Photon ‘07, Daegu

  37. arXiv: 0704.1000 KSp+p-K-matrix (bckup) BW formalism: M(s1) = 527 ±6 MeV/c2 G(s1) = 442 ±10 MeV M(s2) = 1031 ±11 MeV/c2 G(s2) = 94 ±6 MeV D0→ KSp+p- scalar pp K-matrix formalism: unit. relat. for 2-body scatt. trans. operator: T: NchxNch matrix for Nch coupled chann.; r: density of final states product. ampl.: product. process (init. state non-interacting with channel j); trans. ampl. unitarity: satisf. by defining parameters taken from: unitarity satisf. if V.V. Anisovich, A.V. Sarantev, Eur.Phys.J. A16, 229 (2003) BaBar, hep-ex/0507101 B. Golob, Belle D0 Mixing 37 Lepton Photon ‘07, Daegu

  38. arXiv: 0704.1000 KSp+p-eff., resol. (bckup) D0→ KSp+p- efficiency and resol. in M(pp) rnd ps bkg.: Prnd [(1-fw) M(m-2,m+2,t) +fwM(m+2,m-2,t)] R(t) fw from fit to Q side band: fw= 0.452 ± 0.005 diff. w.r.t. fw=0.5 in systematic error comb. bkg.: Pcmb  B(m-2,m+2) * ([ d(t) + Exp(t) ]R’(t) parameters from fit to Dalitz and t distrib. of M(KSp+p- ) sideband (systematics: Dalitz distrib. in different t intervals) B. Golob, Belle D0 Mixing 38 Lepton Photon ‘07, Daegu

  39. arXiv: 0704.1000 KSp+p-toy MC (bckup) D0→ KSp+p- MC tests, correct reconstruction of input; t-projection; PsigM(m-2,m+2,t)  R(t) Prnd [(1-fw) M(m-2,m+2,t) +fwM(m+2,m-2,t)] R(t) Pcmb  Msideband(m-2,m+2,t) * [ d(t) + Exp(t) ]R’(t) B. Golob, Belle D0 Mixing 39 Lepton Photon ‘07, Daegu

  40. hep-ex/0703036v2 K+K-/ p+p-, M, Q (bckup) D0→ K+K-/ p+p- M [GeV/c2] B. Golob, Belle D0 Mixing 40 Lepton Photon ‘07, Daegu

  41. hep-ex/0703036v2 K+K-/ p+p-, systematics (bckup) D0→ K+K-/ p+p- systematics K+K- only: yCP=(1.25 ±0.39)% AG=(0.15 ±0.35)% p+p- only: yCP=(1.44 ±0.57)% AG=(-0.28 ±0.52)% B. Golob, Belle D0 Mixing 41 Lepton Photon ‘07, Daegu

  42. K-p+ PRL 98, 211803 (2007), 540fb-1 K+K- / p+p-resolution (bckup) Fit simultaneous binned likelihood fit to K+K-/K-p+/p+p- decay-t, common free yCP R : ideally each si Gaussian resol. term with fraction fi; : described by 3 Gaussians  event-by-event st trec-tgen/st parameters of R depend slightly on data taking conditions t = 408.7±0.6 fs tPDG=410.1±1.5 fs B. Golob, Belle D0 Mixing 42 Lepton Photon ‘07, Daegu

  43. hep-ex/0703036v2 K+K-/ p+p-, t fit (bckup) < t > D0→ K+K-/ p+p- systematic checks running periods w/ diff. conditions robust to resol. f. shape; R(t): single Gauss → Dt=3.5%, DyCP=0.01%; no bias, reweigted MC: yCP(out) - yCP(in) < 0.04%; background P=98% (KK), 99% (Kp), 92% (pp); changing data side band/MC signal, DyCP = -0.04%; bkg. subtracted / no bkg. subtraction, DyCP = -0.07%; bkg. subtracted / MC signal subtr., DyCP= -0.03%; fitted t0 of R for Kp B. Golob, Belle D0 Mixing 43 Lepton Photon ‘07, Daegu

  44. hep-ex/0703036v2 K+K-/ p+p-, t0 (bckup) D0→ K+K-/ p+p- fitted t0 of R in diff. run periods and diff. decay modes B. Golob, Belle D0 Mixing 44 Lepton Photon ‘07, Daegu

  45. hep-ex/0703036v2 K+K-/ p+p-, t0 (bckup) D0→ K+K- / p+p- equal t0 assumption DyCP=t0CP - t0Kp / tKp from MC cocktail, including running periods with slight misalign. of SVD B. Golob, Belle D0 Mixing 45 Lepton Photon ‘07, Daegu

  46. hep-ex/0703036v2 K+K-/ p+p-, bkg t distr. (bckup) D0→ K+K-/ p+p- background comparison small tail of signal present in side band, only visible in Kp sample; fraction of rnd ps negligible: 0.3%, 0.3%, 0.2% KK Kppp B. Golob, Belle D0 Mixing 46 Lepton Photon ‘07, Daegu

  47. K+K-/ p+p-,KSp+p-comparison (bckup) Results KSp+p- : (x,y)=(0,0) has C.L. 2.6% K+K- / p+p-:y=0 has C.L. 6x10-4 B. Golob, Belle D0 Mixing 47 Lepton Photon ‘07, Daegu

  48. Measurements average (bckup) Combination, no CPV sum of likelihood curves, non-Gaussian shapes accounted HFAG charm, http://www.slac.stanford.edu/xorg/hfag/charm/index.html x yCP B. Golob, Belle D0 Mixing 48 Lepton Photon ‘07, Daegu

  49. Measurements average (bckup) Combination, no CPV sum of likelihood curves, non-Gaussian shapes accounted HFAG charm, http://www.slac.stanford.edu/xorg/hfag/charm/index.html dKp y B. Golob, Belle D0 Mixing 49 Lepton Photon ‘07, Daegu

  50. Measurements average (bckup) Combination, no CPV sum of likelihood curves, non-Gaussian shapes accounted HFAG charm, http://www.slac.stanford.edu/xorg/hfag/charm/index.html y D0 → K+ p- y’ x’2 x CPV: AD = (-0.76 ± 3.10)% B. Golob, Belle D0 Mixing 50 Lepton Photon ‘07, Daegu

More Related