Hyperon- and Antihyperon-Nucleon Scattering at Lear

摘要

We have proposed to study at LEAR the production of hyperon-antihyperon pairs i.e. the two-body processes: anti pp- implies anti YY-, where Y: lambda , sigma , near threshold. Within the momentum range of LEAR the following pair creations are possible: anti lambda lambda -, lambda sigma sub 0 + c.c., anti sigma exp + sigma exp + , anti sigma exp 0 sigma exp 0 and anti sigma exp - sigma exp - . As an example the momentum interval of the anti lambda lambda -pair at the maximum anti p-momentum of 2 GeV/c covers the range 0.4 < p/sub lambda , anti lambda ) < 1.6 GeV/c. The yield at the rate of 10 exp 6 anti p/s and a production target of 2.5 mm CH sub 2 amounts to about 2.10 exp 5 anti lambda lambda -pairs per day, 5.10 exp 4 of these yielding 4 charged decay particles. This rate is sufficiently large to make detailed studies of hyperon-nucleon and hyperon-nuclei interactions feasible. This information is of vital importance for our understanding of the strong interaction. (ERA citation 07:062272)