The $$ \bar{p}n\to m\pi $$ Amplitude Subthreshold from Proton Spectra of $$ \bar{p}d\to m\pi p$$ at Rest

Low-energy pion-nucleon scattering

“…Since it contributes about 1/3 of the value of f 2 , the error in f 2 from this source is less than 1/3 %. Locher and Sainio [48] concluded, however, that the uncertainty in J was slightly larger, leading to a 1% error in f 2 .…”

On the history of dibaryons and their final observation

“…For reviews on this epoch see Refs. [2,3,4,7,8]. For a critical, but also very amusing review of this epoch see, e.g.…”

“…We note that in a recent article[398] it is argued that the width of an unbound ∆∆ configuration is equal to the width of just a single ∆ 3. The solution with a factor 2/3 applied assumes that there is no decay into ppπ 0 π − and nnπ + π 0 channels as well as a reduced decay into the npπ + π − channel, which is not in accordance with experimental results, see discussion of branchings in the next section…”

Sum rules for strong decays of 10 and 27 dibaryon multiplets in broken SU(3) symmetry

“…Interest in the study of dibaryons rose in 1977 when Jaffe [5] predicted the so-called Hdibaryon, a bound ΛΛ system containing two strange quarks. Diverse amount of predicted states triggered a worldwide rush of experimental dibaryon searches [6][7][8]. Recently, two groups announced that lattice QCD calculations [9][10][11] provide evidence for a bound Hdibaryon, as predicted.…”