1 / 78

Status of Super B Project

Status of Super B Project. Marcello A. Giorgi Università di Pisa & INFN Pisa. VII SuperB Workshop La Biodola May 31,2008. Since last SuperB workshop. IRC meetings Presentations at ECFA Crab waist test in Frascati Valencia Retreat on Physics Program

leesamuel
Download Presentation

Status of Super B Project

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. Status of SuperB Project Marcello A. GiorgiUniversità di Pisa & INFN Pisa VII SuperB Workshop La Biodola May 31,2008 Marcello A. Giorgi

  2. Since last SuperB workshop • IRC meetings • Presentations at ECFA • Crab waist test in Frascati • Valencia Retreat on Physics Program • A lot of progress in detector understanding and modeling Marcello A. Giorgi

  3. SuperB CDR was ready in may 2007 A CDR was delivered to the President of INFN in May 2007. INFN has set up an International Review Committee to evaluate the CDR proposal and in particular the physics program and the machine ideas. The IRC was lead by J.Dainton and formed byH.Aihara, R.D.Heuer, Y.K.Kim, J.Lefrancois, A.Masiero, D.Schulte, A.Seiden. They met in July 07, November 07, and april 29 and 30 2008. Meanwhile the project has been presented to ECFA at Manchester during the july 07 conference of EPS and more recently in the RECFA meeting in Lisbon last march 29, 2008. Rolf Heuer didn’t attend the last meeting and the preparation of the report. T.Nakada and S.Myers have participated to the conclusion. Marcello A. Giorgi

  4. REPORT IS READY It will be presented Sunday june 1,2008 by J.Dainton at the general meeting of SuperB starting tomorrow may 31 in the Elba (Italy) Mainly focused on Physics program with 10 36 , polarization >80% And possibility of running asymmetric at 4 GeV c.m.s. Energy for charm asymmetry in time dependent analysis. Marcello A. Giorgi

  5. Crab Waist Test (see P.Raimondi talk) Marcello A. Giorgi

  6. MACHINE: Crab Waist Test with DAΦNE • Tests undergoing in Frascati right now • Small angle EMC as luminosity monitor • Beam crabbing made by 2 pairs of Sextupoles Crab Sextupoles Marcello A. Giorgi

  7. DANE test summary • Crab sextupoles are working very nicely • Luminosity stable above 1.5x1032 reached • No “hard to fix” problems found so far, but many more than desired • A lot of “single pieces” are working very nicely, need to put all together at the same time • Commissioning rate was a factor 2 slower than hoped Marcello A. Giorgi

  8. Crab OFF Crab ON e- e+ Effect of crab sextupoles on luminosity LUMINOMETERS A huge work on machine optimization has been done and is still in progress in term of feedbacks systems tuning, background minimization and tuning of the machine luminosity Transverse beam dimensions at the Synchrotron Light Monitor x y Blow-up in beam sizes and decrease in Bhabha rates observed when crab sexts for one ring OFF (other ring ON) Marcello A. Giorgi

  9. Specific luminosity • Specific Luminosity(vs time) does not depends on beam currents • headrom for luminosity improvements Marcello A. Giorgi

  10. MEMO for IRC and P5 Marcello A. Giorgi

  11. SuperB parameters with higher Wall Power 150m needed for Polarization LEB HEB Asymmetric bunch size to optimize beam lifetime (Touschek effect) Doubling currents with a factor 2 in Wall power we can double the luminosity Marcello A. Giorgi

  12. SuperB expected LUMI >80ab-1 in 7th year After 7th year integrated Luminosity can grow at rate of 40 ab-1/year Marcello A. Giorgi

  13. From Valencia Retreat (see A.Stocchi talk) Marcello A. Giorgi

  14. Physics on CDR (comparisons with 50 ab-1)More recently update on physics program for 75 ab-1 after the Valencia Physics retreat Update on physics (potential discovery of New Physics with a 75 ab-1 in 5 years ) for B, Charm, Tau’s and new Spectroscopy . Examine carefully the potential benefits of running at 4GeV c.m.s. Energy and of the Polarization. Organize the preparation of the simulation tools to evaluate the correct experimental sensitivity to the most relevant physics channels Marcello A. Giorgi

  15. GOLDEN MODES for different scenarios The GOLDEN channel for the given scenario Not the GOLDEN channel for the given scenario but can show experimentally measurable deviation from SM. X X X X- CKM X X X- CKM X Marcello A. Giorgi

  16. COMPLEMENTARY FLAVOUR meas. AND LHC IF LHC DISCOVERS SUPERSYMMETRY Red are LHC+EW constraints+SuperB Blue is LHC alone Marcello A. Giorgi

  17. TAU LFV (use of polarization) Polarization is only partially used in this estimate. An optimization of the BKG rejection is in progress. But Pol. helps to discriminate models. In some model there is a strong effect on the angular distribution of m from signal: Marcello A. Giorgi

  18. Comparison with Snowmass points on Tau using also polarization SuperB with 75 ab-1, evaluation assuming the most conservative scenario about syst. errors LFV 5s disc 1÷2 Marcello A. Giorgi

  19. Tau g-2 <1 Make use of all the informations (total x-section,angular distribution, f-b asymmetry. Measure Re and Im parts Start with the expt. with m Marcello A. Giorgi

  20. CPV in Charm CP violation can be studied in high statistics as: • Indirect in the mixing • Direct in the decay With very high statistics at Y4S together with tau and B physics BUT time dependent analysis is needed for CP violation in the interference mixing-decay,for it runs at charm threshold production are needed in asymmetric factory mode . D0K+K- and D0p+p- can be studied with time dependent analysis and ff can be extracted. Marcello A. Giorgi

  21. On detector (see talk of F.Forti) Marcello A. Giorgi

  22. Detector Layout – Reuse parts of Babar (or Belle) BASELINE OPTION Marcello A. Giorgi

  23. Detector R&D Progress Test beam goals for 2008-2010 • Silicon Vertex Tracker • MAPS pixel devices: resolution, efficiency, readout speed • Advanced trigger systems (Associative Memories) • Drift Chamber • Cell size, shape, and gas mixture • Particle ID system (forward system) • Radiators (Aerogel, NaF) • Photon detector (MCP, MAPMTs, SiPM) • Timing for TOF system • Electromagnetic Calorimeter • Forw: LYSO Crystals leakage, resolution, mechanical structure • Back: Lead-scintillator calorimeter resolution • Instrumented Flux Return • Scintillator, fibers, photon detector, readout electronics • Detection efficiency, time/space resolution • Integrated slice • Track trigger, material in front of EMC, timing for TOF, forward PID options Lots of progress • R&D technical progress in all detector subsystems • Started the definition of strategies for Electronics and DAQ design • Large computing effort for simulation • Subdetector groups are building up  collaboration • SuperB is included in the DevDet FP7 proposal • Improve infrastructure for detector R&D • Mainly focused on improving LNF Beam test facility • Electronics and software network Marcello A. Giorgi

  24. Progress in simulation • Development of both fast (parametrized) and full (Geant4) simulation programs started. • Reuse Babar code where possible • Remove dependencies from private Babar code to allow redistribution to outside Babar • Use more modern approach to geometry description (GDML, developed for LHC) • Fast simulation targeted at physics benchmarking • Geant4 simulation targeted at backgrounds Geant4 Model Marcello A. Giorgi

  25. GOAL now Setup the structure for TDR – start now Move towards forming collaboration- start now Major goal: DECISION about the approval by next winter. Marcello A. Giorgi

  26. Committees The SuperB Steering has recently setup 3 ad hoc committees with specific tasks: Resources (chair: M.G., D.Leith) with the task of identifying the human resources required to do the TDR work and then to build SuperB . Outreach (chair:G.Batignani) with the task of developing reference material at different levels for different goals: • Scientific for various agencies and for the scientific community outside SuperB • Non scientific for publicity in non scientific/ non physics environment as politicians, University managements , media and public opinion. Governance (chair:D.Hitlin) with the task of • preparing a recommendation to INFN and the other agencies for reaching a reasonable and  true international  structure for the SuperB enterprise. • Propose the governance for the experiment collaboration.     Reports at the end of this 7th WORKSHOP Marcello A. Giorgi

  27. Already some activity started! (the easyest) Very preliminary estimate, number of people and time (FTE) Marcello A. Giorgi

  28. END Marcello A. Giorgi

  29. ON MACHINE : Guiding principles Flavour Physics was recently in the front line of the stage thanks to the e+ e- factories. What in the next decade will e+ e- factories say about new physics and contribute as complementary to LHC and LHCb ? A LOT! Providing they can produce more than 5 10 10 and 10 11 b, c and t pairs in 5 years and from then accumulate 4-5 10 10 more/year. AND AT WITH A REASONABLE ELECTRICITY BILL! Marcello A. Giorgi

  30. Luminosity geometrical Reduction factor • For gaussian bunches: Ne+ ( Ne- ) is the number of positrons (electrons) in a bunch fcoll is the collision frequency σx (σy) is the horizontal (vertical) r.m.s. size at the I.P. Rl is the Luminosity Reduction factor by incomplete overlap: crossing angle and “hour glass” effect. • TRADITIONAL (brute force): increase the numerator Currents increase: from 1A on 2 A up to 4.1 A on 9.4 A- Wall Plug Power, HOM,CSR: hard to surpass 5 1035 cm2s-1Crab Crossing to increase Rland to optimize beam dynamic • SuperB: decrease the denominator (same currents as PEP-II) Bunch sizes: from σy = 3μm down to σy = 40 nm Luminosity: 1036 cm2s-1 ( baseline) . Crab Waist and large Piwinsky angle to optimize beam dynamic Marcello A. Giorgi

  31. Right solution? It appeared as the solution for the high luminosity at a reasonable wall power (≤ 30 MW as in PEPII) BUT: To proceed the validation of simulations was necessary. The large Piwinski angle scheme and crab waist needed to be tested. Preliminary results on test are now available Marcello A. Giorgi

  32. Crab Waist • Crab waist: modulation of the y-waist position, particles collides a same βy realized with a sextupole upstream the IP. • Minimization of nonlinear terms in the beam-beam interaction: reduced emittance growth, suppression of betatron and sincro-betatron coupling • Maximization of the bunch-bunch overlap: luminosity gain Marcello A. Giorgi

  33. Large Piwinsky angle • Bunches are “long” (σz ~ 5 mm), “natural” aspect ratio σy /σx ~ 0.5% • The collision region is short (Σz ~ 400 μm), very small aspect ratio Σy /Σx ~ 0.01 % Marcello A. Giorgi

  34. Machine Parameters (slightly different from CDR) LEB HEB Asymmetric bunch size to optimize beam lifetime (Toushek effect) Baseline Circumference in CDR was 2200 m Marcello A. Giorgi

  35. MORE.. 2 ab-1 10 ab-1 75ab-1 200 ab-1 20 40 60 20 40 60 B  t n and B  m ncombination exclusion plots in [ M(H+), tan b] R= (B l n)/ (B l n )SM in 2HDM with m(H+)=500 GeV BF of Bt n is higher than Bm n, but With the B beam method and high lumi the use of Bm n is almost systematic free due to a cleaner identification of the lepton. Marcello A. Giorgi

  36. ON THE SITE Marcello A. Giorgi

  37. Background simulation • Lattice “MAD” decks can be transformed into G4 geometry • Machine elements and apertures are then introduced into the full simulation for evaluation of backgrounds • Touchek background simulation is benchmarked with Dafne results • Good agreement • Optimization of collimators is needed after each lattice adjustement Background rate in the KLOE forward calorimeter vs. position of the internal jaw of a collimator Marcello A. Giorgi

  38. TOR VERGATA site, close to LNF Ring length =1650m+150m for polarization Marcello A. Giorgi

  39. Accelerator and site costs Note: site cost estimate not as detailed as other estimates. Marcello A. Giorgi

  40. Detector cost Note: options in italics are not summed. We chose to sum the options we considered most likely/necessary. Marcello A. Giorgi

  41. END Marcello A. Giorgi

  42. BACK UPS Marcello A. Giorgi

  43. Lattice layout, PEP-II reuse Total length 1800 m 20 m 280 m Dipoles Available Needed Quad. • All PEP-II magnets are used, dimensions and fields are in rangeRF requirements are met by the present PEP-II RF system Marcello A. Giorgi

  44. END Marcello A. Giorgi

  45. (B PHYSICS) Comparison 10ab-1 with 75 ab-1 Determination of Susy mass insertion parameter (d13)LL with 10 ab-1 and 75 ab-1 Marcello A. Giorgi

  46. END Marcello A. Giorgi

  47. UTfit as now and with SuperB 1 ab-1 50 ab-1 With 50 ab-1 gis measured at 1° level Triangle vertex Determined by N.P. free processes • Theoretical uncertainties on sides could be reduced: (V.Lubicz, SuperB IV Villa Mondragone nov.2006) • Vub : 2% (excl.) 2% (incl.)Vcb : 1% (excl.) 0.5% (incl.) Marcello A. Giorgi

  48. The case for a high luminosity flavour factory • Prejudice: if there is New Physics at the TeV scale it must have a flavor/CP structure • New heavy quanta can be detected through precision measurement of processes involving loop diagrams • Statistics of O(50 ab-1) is necessary to reduce the experimental error below the theoretical uncertainty for the most sensitive analyses • Physics reach is complementary to LHC-LHCb: • many rare decays are not accessible at LHC; • sensitivity to off-diagonal term of squark mixing matrix, • test of LFV in t decays Marcello A. Giorgi

  49. CPV in rare decays (PENGUINS) Marcello A. Giorgi

  50. Rare Decays Marcello A. Giorgi

More Related