Charm Physics at Fermilab E791

Details Charm Physics at Fermilab E791 Charm Physics at Fermilab E791

2000-09-06

arxiv.org/abs/hep-ex/0009015v1

XXVII Rencontre de Moriond, Electroweak (15-22 March 1992) 417-422

Physics

High Energy Physics

High Energy Physics - Experiment

6 pages, 7 figures, LaTex, Fermilab E791 Collaboration

Scientific paper

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- beam was used with a fixed target and a magnetic spectrometer which now includes 23 silicon 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 uS 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 D0 --> K- pi+ and D+ --> K- pi+ pi+ decays. Rarer decays will be pursued.

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