{ital N{bar N}} annihilation in large {ital N}{sub {ital C}} QCD with {rho} and {omega} mesons
- Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States)
We use classical/large {ital N}{sub {ital C}} (number of colors) QCD to study nucleon-antinucleon annihilation at rest. We include pion, {rho}, and {omega} fields in the classical dynamics, starting from the nonlinear sigma model. We begin with a spherical blob of pionic matter with zero baryon number and energy of twice the nucleon mass. This evolves according to the classical dynamics to pion and vector meson fields into the radiation zone. The radiation fields are quantized using the method of coherent states modified to include isospin and four momentum conservation. Empirical information is extracted from that coherent state. We find good agreement with data for single particle momentum and number spectra, and with branching ratios to many annihilation channels. All this emerges with nearly no free parameters.
- OSTI ID:
- 118511
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 4 Vol. 52; ISSN PRVCAN; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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