QCD: Photo/Hadroproduction of Heavy Flavors; Fermilab E691, E769 and Beyond
A series of heavy flavor experiments is being performed at the Fermilab Tagged Photon Laboratory. These experiments make use of accurate charged particle tracking, including precise vertex determinations, in an open geometry forward spectrometer. The global transverse energy trigger has high acceptance for all heavy flavor decay modes and allows a wide variety of questions to be addressed.
Some of the results for the completed charm photoproduction experiment (E691), especially production dynamics and relative branching ratios, have been selected for presentation. Their selection is due to their relevance to questions fundamental to QCD, the topic of this workshop. Other results (e.g., on charm particles lifetimes, mixing, Cabibbo single and doubly suppressed decays, etc.) have appeared already or are about to appear.
The current experiment, charm hadroproduction (E769), is also described and its status presented. Finally, plans for future efforts, including beauty hadroproduction, are summarized.
KeywordsMagnetic Tape Charm Production Heavy Flavor Charm Meson Transition Radiation Detector
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- 2.For details see J. Raab, Fermilab-Pub-87–144, submitted to Phys. Rev. D (1987) and references therein.Google Scholar
- 3.E-691; University of California-Santa Barbara: A. Bean, T.E. Browder, P.E. Karchin, S. McHugh, R.J. Morrison, G. Punkar, J.R. Raab, M.S. Witherell; Carleton University: P. Estabrooks, J. Pinfold, J.S. Sidhu; Centro Brasileiro de Pesquisas Fisicas: J.C. Anjos, A.F.S. Santoro, M.H.G. Souza; University of Colorado at Boulder: L.E. Cremaldi, J.R. Elliott, M.C. Gibney, U. Nauenberg; Fermi National Accelerator Lab: J.A. Appel, P.M. Mantsch, T. Nash, M.V. Purohit, K. Sliwa, M.D. Sokoloff, W.J. Spalding, M.E. Streetman; National Research Council: M.J. Losty; Universidade de Sao Paulo: C.O. Escobar; University of Toronto: S.B. Bracker, G.F. Hartner, B.R. Kumar, G.J. Luste, J.F. Martin, S.R. Menary, P. Ong, A.B. Stundzia.Google Scholar
- 4.J.A. Appel, p. 555 in “The Search for Charm, Beauty, and Truth at High Energies,” Proc. of a Europhysics Study Conference on High-Energy Physics held November 15–22, 1981, in Erice, Sicily, Italy, G. Bellini and S.C.C. Ting, editors, Plenum Press, New York (1984).Google Scholar
- 5.E-769; University of California-Santa Barbara: G. Punkar; Centro Brasileiro de Pesquisas Fiscas: G.A. Alves, J.C. Anjos, C. DeBarros, H. DeMotta Filho, A.F.S. Santoro, B. Schulze, M.H.G. Souza; University of Colorado at Boulder: L.M. Cremaldi; Fermilab: J.A. Appel, L. ChenTokarek, R. Dixon, H. Fenker, D. Green, L.Lueking, P.M. Mantsch, T. Nash, W.J. Spalding, M.E. Streetman, D. Summers; Institute of Theoretical Physics-Sao Paulo: A. D’Oliveira; Northeastern University: D. Kaplan, I. Leedom, S. Reucroft; University of Toronto: S.B. Bracker, C. Gay, R. Jedicke, G.J. Luste; Tufts University: J. Metheny, R. Milburn, A. Napier; University of Wisconsin at Madison: D. Errede, M. Sheaff; Yale University: P.E. Karchin, Z. Wu.Google Scholar