Abstract
We investigate pion production via nucleon-nucleon scattering, i.e., N+NN+N+, assuming that pion emission takes place effectively at the quark level and that quark-quark interactions are described to a reasonable approximation by one-gluon exchange plus effective one-pion exchange. The six-quark wave function is totally antisymmetried. Consequently, reaction mechanisms may be grouped into several categories: (1) one-nucleon mechanism or the nucleon-only impulse approximation, (2) two-nucleon mechanisms or meson-exchange currents, and (3) reaction mechanisms involving quark interchange. Applying the formalism to the reactions p+pd++ and n+pp+p+-, we find that, for a nucleon radius of greater than 0.8 fm (as measured in the MIT bag model), reaction mechanisms involving quark interchange may be as important as the conventional one-nucleon or two-nucleon reaction mechanisms even near the pion production threshold. This specific result provides a quantitative support of the conclusion reached by Miller and Kisslinger in the hybrid quark-baryon model concerning the necessity of incorporating quark effects in describing pion production or absorption reactions.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1785-1797 |
| Number of pages | 13 |
| Journal | Physical Review C |
| Volume | 34 |
| Issue number | 5 |
| DOIs | |
| State | Published - Jan 1 1986 |
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ASJC Scopus subject areas
- Nuclear and High Energy Physics
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Importance of quark interchange in pion production via nucleon-nucleon scattering. / Cao, Zongjian; Hwang, W. Y.P.
In: Physical Review C, Vol. 34, No. 5, 01.01.1986, p. 1785-1797.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Importance of quark interchange in pion production via nucleon-nucleon scattering
AU - Cao, Zongjian
AU - Hwang, W. Y.P.
PY - 1986/1/1
Y1 - 1986/1/1
N2 - We investigate pion production via nucleon-nucleon scattering, i.e., N+NN+N+, assuming that pion emission takes place effectively at the quark level and that quark-quark interactions are described to a reasonable approximation by one-gluon exchange plus effective one-pion exchange. The six-quark wave function is totally antisymmetried. Consequently, reaction mechanisms may be grouped into several categories: (1) one-nucleon mechanism or the nucleon-only impulse approximation, (2) two-nucleon mechanisms or meson-exchange currents, and (3) reaction mechanisms involving quark interchange. Applying the formalism to the reactions p+pd++ and n+pp+p+-, we find that, for a nucleon radius of greater than 0.8 fm (as measured in the MIT bag model), reaction mechanisms involving quark interchange may be as important as the conventional one-nucleon or two-nucleon reaction mechanisms even near the pion production threshold. This specific result provides a quantitative support of the conclusion reached by Miller and Kisslinger in the hybrid quark-baryon model concerning the necessity of incorporating quark effects in describing pion production or absorption reactions.
AB - We investigate pion production via nucleon-nucleon scattering, i.e., N+NN+N+, assuming that pion emission takes place effectively at the quark level and that quark-quark interactions are described to a reasonable approximation by one-gluon exchange plus effective one-pion exchange. The six-quark wave function is totally antisymmetried. Consequently, reaction mechanisms may be grouped into several categories: (1) one-nucleon mechanism or the nucleon-only impulse approximation, (2) two-nucleon mechanisms or meson-exchange currents, and (3) reaction mechanisms involving quark interchange. Applying the formalism to the reactions p+pd++ and n+pp+p+-, we find that, for a nucleon radius of greater than 0.8 fm (as measured in the MIT bag model), reaction mechanisms involving quark interchange may be as important as the conventional one-nucleon or two-nucleon reaction mechanisms even near the pion production threshold. This specific result provides a quantitative support of the conclusion reached by Miller and Kisslinger in the hybrid quark-baryon model concerning the necessity of incorporating quark effects in describing pion production or absorption reactions.
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U2 - 10.1103/PhysRevC.34.1785
DO - 10.1103/PhysRevC.34.1785
M3 - Article
VL - 34
SP - 1785
EP - 1797
JO - Physical Review C - Nuclear Physics
JF - Physical Review C - Nuclear Physics
SN - 0556-2813
IS - 5
ER -