Forward-produced short-lived hadrons in ultra-relativistic fixed-target heavy-ion collisions can survive to undergo secondary hadron–nucleus collisions with neighboring lattice nuclei due to Lorentz contraction and time dilation.
The high-intensity hyperon beam at CERN
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abstract
A high-intensity hyperon beam was constructed at CERN to deliver Sigma- to experiment WA89 at the Omega facility and operated from 1989 to 1994. The setup allowed rapid changeover between hyperon and conventional hadron beam configurations. The beam provided a Sigma-flux of 1.4 x 10^5 per burst at mean momenta between 330 and 345 Gev/c, produced by about 3 x 10^10 protons of 450 GeV/c . At the experiment target the beam had a Sigma-/pi- ratio close to 0.4 and a size of 1.6 x 3.7 cm^2. The beam particle trajectories and their momenta were measured with a scintillating fibre hodoscope in the beam channel and a silicon microstrip detector at the exit of the channel. A fast transition radiation detector was used to identify the pion component of the beam.
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Secondary Hadron--Nucleus Collisions of Short-Lived Hadrons in Ultra-Relativistic Fixed-Target Heavy-Ion Interactions
Forward-produced short-lived hadrons in ultra-relativistic fixed-target heavy-ion collisions can survive to undergo secondary hadron–nucleus collisions with neighboring lattice nuclei due to Lorentz contraction and time dilation.