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SuperKEKB a new luminosity frontier

SuperKEKB a new luminosity frontier. Masashi Hazumi (KEK) 3 rd International Conference on Flavor Physics (ICFP2005), NCU, Taiwan, October 3-8, 2005. SuperKEKB overview. 40  KEKB design goal 25  present world record from KEKB. Super-high luminosity  410 35 cm - 2 s - 1

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SuperKEKB a new luminosity frontier

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  1. SuperKEKBa new luminosity frontier Masashi Hazumi (KEK) 3rd International Conference on Flavor Physics (ICFP2005), NCU, Taiwan, October 3-8, 2005

  2. SuperKEKB overview 40  KEKB design goal 25  present world record from KEKB • Super-high luminosity  41035 cm-2s-1 • 5109 BB per yr. • 4109t +t - per yr. • Letter of Intent (LoI) in 2004 • 276 authors from 61 institutions • available at http://belle.kek.jp/superb/loi • “Physics at Super B Factory” hep-ex/0406071 • Official budget request* (“gaisan” request) sent from KEK to MEXT** in Aug. 2005 *This does not mean the official approval of the project. **Ministry of Education, Culture, Sports, Science and Technology

  3. Bunch length(s) • 7 ~ 9 mm -> 3 mm How to achieve the super-high luminosity Crab cavity

  4. Crab cavity: a new idea for higher luminosity • Head-on collisions with finite crossing angle ! • avoid parasitic collisions • collisions with highest symmetry  large beam-beam parameter

  5. First performance report expected in summer 2006 • Factor ~2 gain in Lpeak expected within ~2 years • ~31034cm-2s-1 within our reach

  6. 5 4 3 NBB (1010) 2 We are here. 1 NBB ~100  now ! in the LHC era & before ILC Projection of integrated luminosity • Crab cavity installation in 2006 • ~2109 BB pairs by 2008 (4now) • Long shutdown (14months) in 2009-2010 • Constant improvement from 2010 • realistic and reliable plan based on experiences at KEKB • Crab cavities well tested before 2010: a big advantage !

  7. Time-dependent CPV (tCPV) (SuperKEKB projection at 50ab-1) B0gJ/Ks DSfKsSfKs-SJ/Ks < 0 can clearly be established. B0gfKs

  8. Issues for the upgrade 4Higher background ( 20) 4Higher event rate ( 10) 4Require special features • radiation damage and occupancy • fake hits and pile-up noise in the EM - higher rate trigger, DAQ and computing • low pm identification f smm recon. eff. • hermeticity fn “reconstruction” Belle detector K/pseparation • , p0 reconstruction e+-, KLidentification Aerogel Cherenkov Counter n = 1.015~1.030 Electromagnetic Calorimeter CsI(Tl) 16X0 3.5 GeV e+ TOF counter K/pseparation charged particle tracking 8.0 GeV e- Central Drift Chamber momentum, dE/dx 50-layers + He/C2H6 B vertex Muon / KLidentification Si Vertex Detector 4-layer DSSD KLm detector 14/15 layer RPC+Fe

  9. SuperBelle detector Aerogel Cherenkov counter + TOF counter g “TOP” + RICH CsI(Tl) 16X0 g pure CsI (endcap) Si vtx. det. 4 lyr. DSSD SC solenoid 1.5T g 2 pixel/striplet lyrs. + 4 lyr. DSSD Tracking + dE/dx small cell + He/C2H6 • remove inner lyrs. Use fast gas m / KL detection 14/15 lyr. RPC+Fe g tile scintillator New readout and computing systems In general, requirements less severe than those for LHC

  10. Second detector ? We may invite another detector. Answer by K. Oide HL6 workshop, 2004

  11. Vub Charged Higgs direct CPV f2(a) isospin analysis p+ p- Ks trajectory B vertex IP profile g g Measurements in clean environment Dtn etc. B meson beam ! • B decays with neutrinos BgDtn, tn, uln etc. • B decays with g, p0Bg Xsg, p0p0 etc. • B vertex reconstruction with Ks only ! BgKsp0, Ksp0g etc. B e- (8GeV) e+(3.5GeV) Υ(4S) p B full (0.1~0.3%) reconstruction BgDp etc.

  12. Physics atSuperKEKB

  13. matter no antimatter (BAU) H DM cut-off at ~TeV Cf. Physics of top quark Direct production, Mass, width etc.  CDF/D0 Off-diagonal couplings, phase  BaBar/Belle Motivation • Physics beyond the Standard Model (SM) must exist. • Good chance to find TeV New Physics at LHC • If LHC finds TeV New Physics, • its flavor structure must be examined experimentally. A super B factory is the best tool for this purpose. • If LHC finds nothing but SM-like Higgs, • search for small deviations from the SM in flavor physics will be one of the best ways to obtain a hint of new physics energy scale.

  14. Right-handed current, quark mixing and CPV New left-handed current, quark mixing and CPV Our present dogmas from the SM are no more valid. • No right-handed current • No additional CPV phase • Off-diagonal terms in quark mixing strongly suppressed Extended flavor structure Left-handed current, quark mixing and CPV VCKM(A,l,r,h) Recall the dramatic breakdown of our old dogma “neutrinos are massless.”

  15. Correlations “DNA identification” of new physics Elucidation of New Physics scenarios e.g. SUSY mechanism How do we study the extended flavor structure ? 1) 2) • Many clean measurements (both exp. & th.) unique at e+e- SuperB • New CPV phase(s) in b g sqq :e.g. tCPV in B0gfKs, h’Ks, KsKsKs • Right-handed current in b g sg :e.g. tCPV in B0gKsp0g • Lepton flavor violation in t decays :e.g. tgmg • Charged Higgs in tree diagram :e.g. Br(BgDtn)/Br(BgDmn) • bgdg, AFB in bgsl+l-, BgK*nn, Bgln, and more 3) 4) SuperB: Leading experiment for Bd/u, t (and charm)

  16. DSfK0(July 2005) DSfK0(SuperKEKB) SM predictions 1) New CPV phases in bsqq summer 2005 50ab-1 assuming present WA ∆S(fKs) at 50ab-1 = XX 0.03(stat)  0.01(syst) 0.04(th)

  17. SUSY Flavor Physics squark/slepton mass matrix FCNC Off-diagonal terms Flavor Structure Luminosity frontier Diagonal terms Mass Spectrum Energy frontier (LHC, LC) Left-handed Right-handed Flavor mixing parameterization for bgs (2313 for bgd)

  18. LL RR LR RL In LR or RL, O(1) deviation can be created (although strongly disfavored by exp.) up to multi TeV. G.L.Kane, P.Ko, Haibin Wang, C.Kolda, Jae-hyeon Park, Lian-Tao Wang, PRD70, 035015 (2004)

  19. LR Caution ! Other possible problems in SUSY at very large mass scale not taken into account. Thank you Jae-heyon !

  20. SM only fKs 0.2 0.4 Summer 2005 0.6 ASUSY ASM | | 0.8 based on S.Khalil and E.Kou PRD67, 055009 (2003) and SuperKEKB LoI

  21. fKs Summer 2005

  22. fKs

  23. fKs

  24. fKs

  25. If established, fKs MFV (e.g. mSUGRA) ? Gauge-mediation ? Big impact on SUSY breaking scenario

  26. fKs

  27. fKs

  28. fKs SUSY GUT needs some mechanism to explain suppressed d or f

  29. mb ms ms mb Present Belle (stat.) 5ab-1 50ab-1 S(BK*g, K*Ksp0) 0.52 0.14 0.04 2) Right-handed current in bgsg D.Atwood, M.Gronau, A.Soni (1997) D.Atwood, T.Gershon, M.H, A.Soni (2004) • tCPV in B0g Ksp0g • SM: g is polarized, the final state almost flavor-specific. S(Ksp0g) ~ -2ms/mbsin2f1 • mheavy/mb enhancement for right-handed current in many new physics models • LRSM, SUSY, Randall-Sundrum (warped extra dimension) model • LRSM: SU(2)LSU(2)RU(1) • Right-handed amplitude mt/mb :  is WL-WR mixing parameter • for present exp. bounds ( < 0.003, WR mass > 1.4TeV) |S(Ksp0g)| ~ 0.5 is allowed. • No need for a new CPV phase

  30. CPV in b g s and SUSY breaking • Correlations are useful to differentiate new physics models Expected precision at 5ab-1 T.Goto, Y.Okada, Y.Shimizu,T.Shindou, M.Tanaka (2002, 2004) + SuperKEKB LoI

  31. tlg w/ improvement Extrapolation Present CLEO tlp/h/h’ t3l tl Ks tB g/p 3) Lepton flavor violation in t decays LFV in neutrino sector ⇒LFV in charged leptons ? Search for “SM Zero” tlg t3l, lh B-factory = “Tau-factory” ~1010t pairs at 10ab-1 Search region enters into O(10-9)

  32. Br( tgmg) S(fKs) Br(b g sg) 50ab-1 A(b g sg) AFB(b g sll) S(K*g) S(fKs) A(b g sg) Br(b g sg) AFB(b g sll) More tests of SUSY breaking scenarios tlg SUSY GUT relation Correlation to b g s DS0 implies lower bound on Br(tgmg) T.Goto, Y.Okada, Y.Shimizu,T.Shindou, M.Tanaka (2002, 2004) + SuperKEKB LoI

  33. c b H+/W+ t+ nt 4) Charged Higgs in tree diagram • BDtn (semileptonic decay) Blue bands from form-factor uncertainty • Full reconstruction tag • Signal  large missing mass • Expected at 5ab-1

  34. c b H+/W+ H+/W+ t+ t+ nt Sensitivity for Charged Higgs Constraint from BXsg BDtn D(Form-factor) ~5% D(Form-factor) ~15% Btn (present) LHC 100fb-1

  35. (at 50 ab-1) Vub & f3 sin2f1 & Dmd CKM Unitarity Triangle CKM is only one part of SuperB physics programs, but still provides model indep. approach to constrain NP. M12=M12SM + M12NP

  36. Expected Sensitivities for B mesons at SuperKEKB SuperKEKB 5ab-1 50ab-1 LHCb 2fb-1 CPV (b g s) FCNC w/ n CKM and rich t physics # of produced B’s irrelevant to physics reach comparison

  37. Pattern of the deviation from the SM Unitarity triangle Rare decays ++: Large, +: sizable, -: small “DNA Identification” of New Physics from Flavor Structure

  38. Many other new measurements • AFB in B g K*ll • B g K*nn, tn • b g dg • Observation of direct/mixing-induced CPV in many decays • sin2W from e+e-gm+m- FB asymmetry • T violation 3-body baryonic decays within SM • Light DM in Y(1S) decays • New hadrons (X, Y, Z, XX, YY, ...) impossible to give a complete list.

  39. Summary • SuperKEKB target luminosity = 41035cm-2s-1 • Crab cavity from 2006: “start of SuperKEKB” • Super-high-luminosity data taking from 2010 (proposal) • new luminosity frontier in the LHC era • # of B mesons ~ 100 times larger ! • Physics Goals • Search for new origin of flavor mixing and CPV • If LHC finds TeV new physics • Elucidation of new physics scenarios (e.g. SUSY breaking) • If LHC finds nothing but SM-like Higgs • Search for small deviations from the SM to obtain a hint of the new physics energy scale. • Your participation is very welcome !

  40. leptons LHC quarks

  41. Backup Slides

  42. Components to be upgraded Interaction Region Crab crossing q=30mrad. by*=3mm New QCS Electric power consumption (KEKB rings) 35MW (KEKB design) -> 83 MW New Beam pipe More RF power (same RF frequency) Damping ring Linac upgrade Charge switch Beam Lifetime ~140min(LER) / ~180min(HER) -> ~40min(LER) / ~50min(HER)

  43. More on background effects • Cleaner than hadron machines even with 20 background • Many off-timing hits, but on-timing background hits sufficiently small • typical track eff. 91%  89% SuperBelle Belle

  44. KM Model of CPV: Success and Puzzles • Beautiful agreements so far! • KM phase IS the dominant source of CPV • New paradigm: search for corrections to KM from New Physics (NP) • Missing links • Difficulty in Baryogenesis • NP Flavor Problem • Many CP-violating phases in NP (No principle to suppress FCNC and CPV) • Present constraints mainly from transitions between • 3rd 1st generations • 2nd 1st generations b  s (3rd 2nd ) should be explored !

  45. Strategy to utilize Clean Environment • Selected observables • sizable deviation from the SM expected, • small hadronic uncertainty, • superior to other exp., in particular to LHCb. loop diagrams • Sensitivity studies • performance = present Belle detector • Vertexing with LoI design (larger VTX) assumed if needed • Extrapolation of Belle results, parametric simulation, Geant Modes with Ks, KL, p0, g, n

  46. SM AFB q2 BXsll FB Asymmetry • Good electroweak probe for bs loop. • q2 distribution has different pattern depending on sign(C7). • Sensitive to Wilson coefficients C9 and C10 • AFB=0 sensitive to NP (determined by C7 and C9) New MC (5ab-1) 5ab-1: dC9~10%, dC10~14% (errors on q2-indep. term) 50ab-1: ~4% very precise measurements

  47. CPV B  f K0 B  KsKsKs B  p+p b  sg .... Branching ratios B  Dtn B  K*nn .... F-B asymmetries t decays (LFV) ..... SUSY1 SUSY2 SUSY3 ..... SUSY-GUT1 SUSY-GUT2 ..... Extra dim. 1 Extra dim. 2 .... LR sym. 1 LR sym. 2 ...... Effective Field Theory <Heff> = SCiQi B physics LHC many observables many NPs LC EDM LFV K physics Muon g-2 Charm physics Challenge at SuperKEKB • Synthesize clean measurements in B and t decays • identify flavor structure • differentiate new physics models • “Synergy” with LHC (and others)

  48. SUSY breaking at SuperKEKB • T. Goto, Y.Okada, Y.Shimizu,T.Shindou, M.Tanaka, hep-ph/0306093, also in SuperKEKB LoI Similar SUSY mass spectra (hard to distinguish) Representative SUSY scenarios a la SUGRA 1 2 3 4 Can we differentiate these 4 scenarios at SuperKEKB ?

  49. SUSY breaking at SuperKEKB TCPV in B -> K*g TCPV in B ->f Ks Direct asymmetry in b -> s g

  50. SUSY vs. Warped Extra Dimensions Agashe,Perez,Soni,hep-ph/0406101(PRL); hep-ph/0408134 at LHCb SuperKEKB B(B g Xsl+l-) = (4.51.0) x 10-6 (present WA) also constrains RR and LL mass insertions; i.e. related to S(fKs) KK gluon

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