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BNM Concluding Remarks

BNM Concluding Remarks. Tom Browder (University of Hawaii). The Super B Factory and “Todaiji”. By 798 the vast compound of Todaiji and its buildings were completed. According to Todaiji records, 50,000 carpenters, 370,000 metal workers,

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BNM Concluding Remarks

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  1. BNM Concluding Remarks Tom Browder (University of Hawaii) The Super B Factory and “Todaiji” By 798 the vast compound of Todaiji and its buildings were completed. According to Todaiji records, 50,000 carpenters, 370,000 metal workers, and 2.18 million laborers worked on its construction and furnishings. The enormous expenses virtually brought the nation to the brink of bankruptcy.

  2. Deep Unsolved Problems in Particle Physics

  3. Where is the anti-matter ? • Sakharov 1967: SM has the prerequisites for baryogenesis: • Baryon number violation at high temperatures (DB=DL) • Non-equilibrium (phase transitions) • CP violation in the quark sector • However, according to the theory department: “The KM (Kobayashi-Maskawa) phase in the SM is probably not sufficient (by about 10 orders of magnitude !)” Refs: V.A Rubakov, M.E. Shaposhnikov, Phys.Usp 39, 461 (1996); A.G. Cohen, D.B. Kaplan, A.E. Nelson, Ann. Rev. Nucl. Part. Sci. 43, 27 (1993). “A New source of CP violation in quarks ?”

  4. Fundamental Questions in Flavor Physics Why three generations ? String Theory ? (e.g. P.Binetruy et.al., hep-th/0509157; J.Phys G.32: 129 (2006)); Larger Symmetry Groups ? Experiments with quarks or heavy leptons? This question is probably too hard – more tractable questions….. Are there New Physics Phases and New sources of CP Violation Beyond the SM ? Experiments: bs CPV, compare CPV angles from tree and loops Are there new operators with quarks enhanced by New Physics ? Experiments: AFB(BK*l l), BK  rates and asymmetries Are there right-handed currents ? Experiments: bs  CPV, B->VPγ or BV V triple-product asymmetries Are there new flavor changing neutral currents ? Experiments: bs ννbar, D-Dbar CPV+mixing+rare, τγ These questions can only be answered at a Super B Factory.

  5. Thanks, Tim Gershon

  6. New physics effects in B decayswill depend on the type of NP SUSY Models popular in Japan (e.g. SU(5) GUT’s connects ’s and quarks) Generic predictions: no signf. effects in B decays, (due to Tevatron Bs mixing constraint) however, enhanced lepton flavor violation such as γ e.g. Okada Generic SUSY Not constrained well. But impossible to make ab initio predictions, too much freedom and too many extra phases and couplings. Extra dimensions

  7. 2006:Intriguing Tension between |Vub| and sin(2φ1) tree loop Small non-zero NP phase Amplitude close to 1 R. Itoh

  8. Off-diagonal SUSY terms with current data x L. Silvestrini

  9. CKM Unitarity Triangle (in)consistency Two scenarios at 50 ab-1 Super B Factory Something new in Precise measurements may show φ3 (tree) measurements are inconsistent with loops.

  10. Extra dimensions (by Randall + Sundrum) New Kaluza-Klein (K.K) particles are associated with the extra dimension. (“Tower of states”) Some may induce certain types of flavor-changing neutral currents. e.g. K.Agashe, G. Perez, A. Soni, PRD 71, 016002 (2005) RS1 ++CPV in D decay SM Model: K.K. Gluon near 3 TeV

  11. New Detectors for B Physics

  12. LHCb J. Libby 10 fb-1 for LHCb 50 fb-1 for SuperB The Super B Factory will face tough competition from LHCb, which is now a real experiment. There is considerable complementarity: photon, neutral detection and inclusive channels are considerable easier at the Super B Factory while time-dependent Bs studies are superior at LHCb.

  13. New Ideas and Unsolved Problems for the Detector at the Super B Factory “Red meat for experimental physicists” Do we have robust solutions for vertexing and particle ID ?

  14. SuperBelle default Barrel BWD EndCap FWD EndCap Realistic design based on discussion with QCS group Vertex:Si striplet (MAPS later) inner-most and Si strip tracker Tracker:Drift chamber r>15cm PID: w/TOP and AC-RICH (endcap) ECAL:CsI (Tl) +wave from (barrel) pure CsI+PMT (endcap) m: Scintillator +SiPM

  15. Detector Layout BASELINE OPTION

  16. Detector summary (Haba) • Now the two detectors look alike even more than before. • 1cm Be beam pipe • Striplet (MAP pixels later) + 5 layer Si strips • Drift chamber tracker for r>15cm • PID with a DIRC-like principle + optional FWD PID • EMcal with CsI(Tl) (barrel reuse) + pure CsI (or LSO) for endcap • Several important points to note • Energy asymmetry/vertex resolution • KLMm detector • APD for pure CsI endcap • Role of backward EC for hermiticity Differences are worth investigating…. There is convergence on the detector

  17. Comments on Super B Factory AcceleratorDevelopments

  18. Simplified SuperB layout Crossing angle = 2*25 mrad November 2006 ILC ring & ILC FF Piredda

  19. Energy asymmetry discussion There is no free lunch INFN: To reduce beam energy spread, improve beam dynamics and reduce power costs, reducethe bg factor from 0.56 to 0.23. To recover BaBar level physics performance, must reduce the beampipe radius to 1cm and improve vertexing performance… May improve acceptance for high multiplicity modes and hermiticity Similar discussions are underway for SuperKEKB in order to reduce power and wiggler costs (T. Tsuboyama, Ohnishi)

  20. Background from Touschek scattering ? • Data taken 28-June-200312:30~13:00 • LER single beam • Vertical beam size changed by “size bump” • Beam lifetime expected to follow Background could depend on Beam current Vertical beam size sy Beam life t 1/t k might be different for different processes

  21. Ante-chamber & solenoid coils to reduce photo-electron clouds Super B Factory at KEK Interaction Region Crab crossing q=30mrad. by*=3mm New QCS New Beam pipe More RF power Damping ring Linac upgrade L = 81035/cm2 /sec

  22. First step towards Super B: Crab crossing . Superconducting crab cavities are now being tested and will be installed at KEKB in 2007

  23. Piredda ILC-style international review committee can examine whether this is realistic Question: 12 nanometer beam spot in y, 2.7 microns in x. Is this possible in a real 2-3 km circumference multi-orbit machine ?

  24. Master Plan for Japanese High Energy Physics

  25. K. Oide “Dai-repoton keikaku” Budget of Japanese acceleratorphysicists Official Announcement from KEK director A. Suzuki on Super B expected in 2007

  26. Thinking outside of the 箱　(hako)

  27. E. Baracchini

  28. E. Baracchini

  29. Bsγγ at Upsilon(5S) E. Baracchini Another example where the Super B is the only machine where this experiment is possible.

  30. Searches for light (~GeV) Dark Matter No sensitivity of direct searches to M<10 GeV • B decays with missing energy: e.g. BK + nothing (use fully reconstructed tags) • Upsilon(1S)nothing (use Upsilon(3S)->Upsilon(1S)  and run KEKB at the Upsilon(3S) resonance, modify trigger) (new Belle UL) T. Iijima Expected BF~O(6 x 10-3) O. Tajima Also may use Upsilon(nS) to look for a very light CP odd neutral Higgs a1 (J. Gunion)

  31. data Fit BG Prediction Br(Y(1S)invisble)=0.6% Results of Belle Dark Matter Search Nsignal = 38 ± 39, consistent with zero BF(Y(1S)invisible) < 2.5x10-3 (90%C.L.) McElrath prediction is disfavored. SM : Y(1S)nnbar O. Tajima

  32. Doing light dark matter: g Uinvisible ~5 GeV, g Due to Beam-BG suppressed “Bhabha veto” Veto with Esum of two-f rings Two-threshold logic is still under testing No signal O. Tajima

  33. Use time-dependent flavor asymmetry in BD* l  to look for deviations from quantum mechanics (Belle) Something for the next SuperB meeting ? Chi^2 =5 Chi^2 =43 Chi^2 =174

  34. Wise words from a discoverer of CP violation:

  35. Backup Slides

  36. x bY e- e+ 2sx/q 2sz*q q z 2sz 2sx “Crab waist” (P. Raimondi) Vertical waist has to be a function of x: Z=0 for particles at –sx(- sx/2q at low current) Z= sx/q for particles at +sx(sx/2q at low current) Crabbed waist realized with a sextupole in phase with the IP in X and at p/2 in Y “Crab waist” removes beam-beam betratron coupling Introduced by the crossing angle May be studied at KEKB and DAFNE in machine experiments

  37. Possible site: Tor Vergata campusRing circumference: 3.-2.2 km O 0.7Km O 1.0Km Piredda Civil construction synergy with FEL project or subway ???

  38. Piredda • An ILC-like parameter list • Same DR emittances • Same DR bunch length • Same DR bunch charges • Same DR damping time • Same ILC-IP betas • Crossing Angle and Crab Waist to minimize BB blowup

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