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The New (g-2) Collaboration Meeting

The New (g-2) Collaboration Meeting. BNL 17-18 June 2004. B. Lee Roberts Department of Physics Boston University. roberts@bu.edu http://physics.bu.edu/roberts.html. New Muon (g-2) Meeting Draft Agenda Berkner Hall Room B Thursday: June 17, 2004

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The New (g-2) Collaboration Meeting

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  1. The New (g-2) Collaboration Meeting BNL 17-18 June 2004 B. Lee Roberts Department of Physics Boston University roberts@bu.edu http://physics.bu.edu/roberts.html B. Lee Roberts, g22 Meeting16June 2004

  2. New Muon (g-2) Meeting Draft Agenda Berkner Hall Room B Thursday: June 17, 2004 8:30 Welcome, introduction Lee Roberts 8:45 Status of the Storage Ring John Benante 9:40 AGS Schedule for the next several years Phil Pile 9:50 The Beamline - Present, limitations Charlie Pearson 10:00 The Beamline - upgrades Paul Debevec 10:50 C o f f e e B r e a k 11:15 The Inflector - present and upgraded Wuzheng Meng 12:00 Thoughts on continuous monitoring of Kicker Yannis Semertzidis eddy currents 12:30 L u n c h B. Lee Roberts, g22 Meeting16June 2004

  3. 1:45 24 Bunches Woody Glenn 2:15 The quads, present and future Yannis Semertzidis 3:00 The upgraded WFDs (for muLaN) Rob Carey 3:45 Other ideas on detectors Prisca Cushman 4:05 B r e a k 4:20 Detectors: Old and New David Hertzog 5:15 Thoughts on DAQ Issues Prisca Cushman 5:30 Collaboration Governance/ Executive Committee Jim Miller/ Lee Roberts Friday: June 18, 2004 8:30 The precision Magnetic Field Ernst Sichtermann 9:45 Systematic Errors/Discussion Jim Miller/ Vanya Logashenko 10:45 C o f f e e B r e a k 11:00 Discussion of the proposal preparation/ assignment of tasks B. Lee Roberts, g22 Meeting16June 2004

  4. Why we are here • We feel that an improvement of at least a factor of 2 can be achieved at BNL, • with reasonable cost • and reasonable running time • Let’s look at where we came from: B. Lee Roberts, g22 Meeting16June 2004

  5. Where we came from: B. Lee Roberts, g22 Meeting16June 2004

  6. Today with e+e- based theory: All E821 results were obtained with a “blind” analysis. B. Lee Roberts, g22 Meeting16June 2004

  7. B. Lee Roberts, g22 Meeting16June 2004

  8. B. Lee Roberts, g22 Meeting16June 2004

  9. systematic errors B. Lee Roberts, g22 Meeting16June 2004

  10. In March DH,JM,LR,WM went to DOE/NSF • We presented what we have done in E821 • We discussed the proposal to improve on aμ down to 0.25 ppm • Bill Marciano gave a strong physics argument of why 0.25 is a well motivated goal. • Our argument was that with modest improvements we could reach this goal. B. Lee Roberts, g22 Meeting16June 2004

  11. W. Marciano, @DOE & NSF11 March 2004 B. Lee Roberts, g22 Meeting16June 2004

  12. Marciano- ctd B. Lee Roberts, g22 Meeting16June 2004

  13. B. Lee Roberts, g22 Meeting16June 2004

  14. 50 45 40 35 30 25 20 15 10 5 0 |Fp | 2 CMD-2 KLOE Comparison with CMD-2 only statistical errors are shown we have evaluated the dispersion integral for theppchannel in the range 0.35 GeV2 < Mpp2 < 0.95 GeV2 ampp= ( 388.7  0.8stat  3.5syst  3.5theo )  10-10 KLOE PRELIMINARY Mpp2 (GeV2) comparison with CMD-2 in the range0.37 GeV2 < Mpp2 < 0.93 GeV2 0.4 0.5 0.6 0.7 0.8 0.9 1 ampp = (375.6  0.8stat  4.9syst+theo)  10-10 KLOE 1.3% Error ampp = (378.6  2.7stat  2.3syst+theo)  10-10 CMD-2 0.9% Error Federico Nguyen B. Lee Roberts, g22 Meeting16June 2004

  15. How the plot from M. Davier et al. (2003) modifies… …including KLOE result Federico Nguyen B. Lee Roberts, g22 Meeting16June 2004

  16. Other hadronic improvements: • BaBar is also using radiative return. The ISR photon is very hard. They have lots of data, but have to replace their muon chambers. • Novosibirsk is upgrading the machine and the detector. B. Lee Roberts, g22 Meeting16June 2004

  17. Experimental Improvements • use 5.2 πGeV beam and take backward μ decays. • improve ωa and ωp systematic errors to 0.1 ppm. • open the inflector ends. • improve the kicker? B. Lee Roberts, g22 Meeting16June 2004

  18. present beamline B. Lee Roberts, g22 Meeting16June 2004

  19. Inflector gain = 1.75 for open ends B. Lee Roberts, g22 Meeting16June 2004

  20. B. Lee Roberts, g22 Meeting16June 2004

  21. kicker we never saw this efficiency turn over…. can we improve the storage rate by an additional kicker? B. Lee Roberts, g22 Meeting16June 2004

  22. B. Lee Roberts, g22 Meeting16June 2004

  23. detectors/electroincs • can we improve the detectors? • or use the Q method? • New electronics • muLaN electronics B. Lee Roberts, g22 Meeting16June 2004

  24. Welcome to each of you • We have many challenges to deal with to reach the new goal. B. Lee Roberts, g22 Meeting16June 2004

  25. B. Lee Roberts, g22 Meeting16June 2004

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