Internal meson dominance for pp-bar annihilation
The previously considered /sup 3/S/sub 1/ internal fusion model of pp-bar..-->..YY-bar, YY-bar /sup */, and Y/sup */Y-bar/sup */ (Y denotes hyperon) at low energies is modified and thereby extended to also include pp-bar..-->..nn-bar and ..delta../sup ++/Delta-bar/sup - -/. It is assumed that the same nonperturbative mechanism that mixes the different qq-bar pairs within the neutral, nonstrange mesons is also responsible for the scattering, annihilation, and creation of qq-bar pairs within the baryon-antibaryon system. More specifically, we assume that processes qq-bar..-->..QQ-bar within the baryon-antibaryon system with q = d or u and Q = d, u, or s quarks is mediated by fusion of the qq-bar to a pseudoscalar or vector meson that also within the system decays into QQ-bar. The /sup 1/S/sub 0/ pseudoscalar-meson model disagrees with experiment whereas the /sup 3/S/sub 1/ vector-meson fusion model is in reasonable agreement with it. As compared to the previously considered /sup 3/S/sub 1/ internal fusion model the main change is an extension of the approximate agreement to the nonstrange final-state baryons. This is achieved since strange baryons in the model are only produced via the small ..omega..-phi mixing.
- Research Organization:
- Institut fuer Theoretische Kernphysik, Universitaet Karlsruhe, Kaiserstrasse 12, D-7500 Karlsruhe 1, West Germany
- OSTI ID:
- 6188728
- Journal Information:
- Phys. Rev. D; (United States), Vol. 39:7
- Country of Publication:
- United States
- Language:
- English
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BARYON-BARYON INTERACTIONS
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645204* - High Energy Physics- Particle Interactions & Properties-Theoretical- Strong Interactions & Properties