D. Beavis et al., SEARCH FOR NEW METASTABLE PARTICLES PRODUCED IN AU+AU COLLISIONS AT 10.8A GEV C/, Physical review letters, 75(17), 1995, pp. 3078-3081
We have investigated particle production using a zero degree two-segme
nt focusing beam-line spectrometer, examining 2 x 10(12) Au + Au inter
actions at a beam momentum of 10.8A GeV/c. We have measured invariant
cross sections for protons, various light nuclei (through A = 6), anti
protons, and have set upper limits on the production of heavier nuclei
, antideuterons, and strangelets. There is no evidence, within the sen
sitivity of our measurements, for the formation of new particles havin
g lifetimes >100 ns.