A method of measuring the close to threshold meson production in neutron-neutron collisions is described where the momenta of the colliding neutrons can be determined with the accuracy obtainable for the proton-proton reaction. The technique is based on the double quasi-free nn->nnX0 reaction, where deuterons are used as a source of neutrons.
Preprint: FZJ-IKP(I)-2001-1 in
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E-print:
http://xxx.lanl.gov/abs/nucl-ex/0108005
Publication:
Phys.Lett. B
517
(2001)
295-298