1 / 30

E732 The Search for the h c Twenty Years Later

E732 The Search for the h c Twenty Years Later. Randy Johnson University of Cincinnati. Kycia Memorial Symposium Brookhaven National Laboratory May 19, 2000. E732 The Search for the h c Twenty Years Later. Randy Johnson University of Cincinnati. Kycia Memorial Symposium

tavia
Download Presentation

E732 The Search for the h c Twenty Years Later

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. E732 The Search for the hc Twenty Years Later Randy Johnson University of Cincinnati Kycia Memorial Symposium Brookhaven National Laboratory May 19, 2000

  2. E732 The Search for the hc Twenty Years Later Randy Johnson University of Cincinnati Kycia Memorial Symposium Brookhaven National Laboratory May 19, 2000

  3. The Holy Grail of Hadron Machines and BNL wants another piece of the action

  4. Expectations 20 Years Ago X(2880) • + Verified DESY result • + Indicated hadronic production • was possible • Too low of mass to be hc • (possible ccqq state?) W. D. Apel, et al., PL 72B 500(1978)

  5. Expectations 20 Years Ago h, h’, hc mixing Harari, PL 60B, 172(1976) hc contains 10% h and 30% h’ Fritzsch and Jackson, PL 66B (1977) hc contains 1% h and 2% h’ hc”gg QCD BR ~ 1x10-3

  6. The Detector Gamma and Charged Particle Vetos 107 p-/pulse E631 Lead Glass Lead Scintillator Converter

  7. In the Interim…. Results from the Crystal Ball

  8. Taking Our Show on the Road Intermediate Results p0p0 p0g gg XX ICHEP No X(2880)

  9. But So Does the Crystal Ball Elliot Bloom

  10. Published Results Physics Letters, 140B 145(1984)

  11. Raw Events gg events predicted from p0g and p0p0 events Acceptance Corrected Events

  12. FinalResult s x Br < 44 pb s(p-p -> hcn) < .15 mb s(p-p -> hcn) s(p-p -> hn) < .02 hc mass

  13. Physics Post Script hc”gg is found CERN FNAL Armstrong, et al., PR D52, 4839(1995) Baglin, et al., PL B187, 191(1987)

  14. Physics of E732 – Twenty Years Later • hc’s are still scarce • Br(hc”gg) ~ .3 x 10-3 (theory 1 x 10-3) • X(2880) has disappeared • hc does not mix with the h, h’

  15. Where are they now? Physics Letters, 140B 145(1984)

  16. Mike Halling Susan, Seth and Mike Designs and builds ion accelerators Eaton Corp., Beverly, MA Physics Letters, 140B 145(1984)

  17. Lynn Garren Computing Division, Focus, BTeV Fermilab Physics Letters, 140B 145(1984)

  18. Tony Wijangco Betty Kwan ? Physics Letters, 140B 145(1984)

  19. Gary Hogan m”eg Proton Radiography Physics Letters, 140B 145(1984)

  20. Jon Thaler Professor, University of Illinois CLEO Physics Letters, 140B 145(1984)

  21. Kirk McDonald Professor, Princeton E144 and BaBar at SLAC Physics Letters, 140B 145(1984)

  22. Stu Smith Professor, Princeton Former Department Chair Technical Coordinator - BaBar Physics Letters, 140B 145(1984)

  23. Mr. Ye (Ming Han) Former Director (retired) Institute for High Energy Physics Beijing Physics Letters, 140B 145(1984)

  24. Mr. Lu (Chang Guo) Physics Letters, 140B 145(1984)

  25. Yours Truly Professor, Cincinnati NuTeV and BooNE, FNAL Physics Letters, 140B 145(1984)

  26. The rest of the Brookhaven Group Physics Letters, 140B 145(1984)

  27. The rest of the Brookhaven Group Physics Letters, 140B 145(1984)

More Related