Od. Dalkarov et al., EVIDENCE FOR A BOUND (N)OVER-BAR-N(1870) STATE PRODUCED IN THE (P)OVER-BAR-D-]P(S)5-PI REACTION, Physics letters. Section B, 392(1-2), 1997, pp. 229-233
It follows from the analysis of the experimental data on quasifree <(p
)over bar n> annihilation that the latter gives strong indications for
a narrow bound <(N)over bar N> state with a mass and width of about 1
870 and 10 MeV, respectively.