TY - JOUR
T1 - "soft-pion" production in the reaction NNNN
AU - Dubach, J.
AU - Silbar, R. R.
AU - Kloet, W. M.
PY - 1980
Y1 - 1980
N2 - We examine the reaction NNNN for "soft-pion" kinematics (p=0 in the center of mass). An earlier calculation based on the Adler-Dothan theorem severely underestimated the p=0 cross section for ppnp+ at 740 MeV. We attempt to understand this discrepancy in the context of a relativistic, unitary, three-body isobar model. The postemission -pole contributions are shown to be very important, even for these "soft-pion" kinematics. Relatively high partial waves in the NNN isobar amplitude are significant. However, after summing all the postemission and preemission diagrams, the discrepancy with experiment is only partially removed.
AB - We examine the reaction NNNN for "soft-pion" kinematics (p=0 in the center of mass). An earlier calculation based on the Adler-Dothan theorem severely underestimated the p=0 cross section for ppnp+ at 740 MeV. We attempt to understand this discrepancy in the context of a relativistic, unitary, three-body isobar model. The postemission -pole contributions are shown to be very important, even for these "soft-pion" kinematics. Relatively high partial waves in the NNN isobar amplitude are significant. However, after summing all the postemission and preemission diagrams, the discrepancy with experiment is only partially removed.
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U2 - 10.1103/PhysRevD.22.2761
DO - 10.1103/PhysRevD.22.2761
M3 - Article
AN - SCOPUS:35949018147
SN - 1550-7998
VL - 22
SP - 2761
EP - 2771
JO - Physical review D: Particles and fields
JF - Physical review D: Particles and fields
IS - 11
ER -