Charm physics at Fermilab E791

Conference · Tue May 26 00:00:00 EDT 1992

OSTI ID:10122571

Amato, S; Anjos, J C; Bediaga, I; Costa, I; de Mello Neto, J R.T.; de Miranda, J; Santoro, A F.S.; Souza, M H.G. ^[1]; Blaylock, G; Burchat, P R; Gagnon, P; Sugano, K ^[2]; de Oliveira, A J; Santha, A; Sokoloff, M D ^[3]; Appel, J A; Banerjee, S; Carter, T; Denisenko, K; Halling, M ; James, C; Kwan, S; Lundberg, B; Thorne, K ^[4]; Burnstein, R; Kasper, P A; Peng, K C; Rubin, H ^[5]; Summers, D J; Aitala, E M; Gounder, K; Rafatian, A; Reidy, J J; Yi, D ^[6]; Granite, D; Nguyen, A; Reay, N W; Reibel, K; Sidwell, R; Stanton, N; Tripathi, A; Witchey, N ^[7]; Purohit, M V; Schwartz, A; Wiener, J ^[8]; Almeida, F M.L.; Ramalho, A J; da Silva Carvalho, H ^[9]; Ashery, D; Gerzon, S; Lichtenstadt, J; May-Tal-Beck, S; Trumer, D ^[10]; Bracker, S B ^[11]; Astorga, J; Milburn, R; Napier, A ^[12]; Radeztsky, S; Sheaff, M ^[13]; Darling, C; Slaughter, J; Takach, S; Wolin, E ^[14]

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1. Centro Brasileiro de Pesquisas Fisicas (CBPF), Rio de Janeiro, RJ (Brazil)
2. California Univ., Santa Cruz, CA (United States)
3. Cincinnati Univ., OH (United States)
4. Fermi National Accelerator Lab., Batavia, IL (United States)
5. Illinois Inst. of Tech., Chicago, IL (United States)
6. University of Mississippi, Oxford, MS (United States)
7. Ohio State Univ., Columbus, OH (United States)
8. Princeton Univ., NJ (United States)
9. Universidade Federal, Rio de Janeiro, RJ (Brazil)
10. Tel Aviv Univ. (Israel)
11. Toronto, Ontario, CA (Canada)
12. Tufts Univ., Medford, MA (United States)
13. Wisconsin Univ., Madison, WI (United States)
14. Yale Univ., New Haven, CT (United States)

Experiment 791 at Fermilab`s Tagged Photon Laboratory has just accumulated a high statistics charm sample by recording 20 billion events on 24000 8mm tapes. A 500 GeV/c {pi}{sup {minus}} beam was used with a fixed target and a magnetic spectrometer which now includes 23 silicon microstrip planes for vertex reconstruction. A new data acquisition system read out 9000 events/sec during the part of the Tevatron cycle that delivered beam. Digitization and readout took 50 {mu}S per event. Data was buffered in eight large FIFO memories to allow continuous event building and continuous tape writing to a wall of 42 Exabytes at 9.6 MB/sec. The 50 terabytes of data buffered to tape is now being filtered on RISC CPUs. Preliminary results show D{sup 0} {yields} K{sup {minus}}{pi}{sup +} and D{sup +} {yields} K{sup {minus}}{pi}{pi}{sup +} decays. Rarer decays will be pursued.

• Research Organization: Mississippi Univ., University, MS (United States). Dept. of Physics and Astronomy
• Sponsoring Organization: USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
• DOE Contract Number: FG05-91ER40622
• OSTI ID: 10122571
• Report Number(s): CONF-9203197-1; ON: DE93006020; IN: UMS/HEP/92-020
• Resource Relation: Conference: 27. Rencontres de Moriond: electroweak interactions and unified theories,Les Arcs (France),15-28 Mar 1992; Other Information: PBD: 26 May 1992
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
D MESONS
HADRONIC PARTICLE DECAY
DATA ACQUISITION SYSTEMS
MAGNETIC SPECTROMETERS
FERMILAB TEVATRON
CHARM PARTICLES
TRIGGER CIRCUITS
MASS SPECTRA
662350
DECAYS OF MESONS