Baryon distribution amplitude: Large-Nc factorization, spin-flavor symmetry and soft-pion theorem
| Autor: | P. V. Pobylitsa |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2005 |
| Předmět: |
Physics
High Energy Physics - Theory Nuclear and High Energy Physics Particle physics Distribution (number theory) High Energy Physics::Lattice Nuclear Theory High Energy Physics::Phenomenology FOS: Physical sciences Symmetry (physics) Baryon High Energy Physics - Phenomenology Amplitude Pion High Energy Physics - Phenomenology (hep-ph) Factorization High Energy Physics - Theory (hep-th) Nucleon Nuclear Experiment Spin-½ |
| Popis: | The 1/N_c expansion for the baryon distribution amplitude is constructed in terms of a specially designed generating functional. At large N_c this functional shows exponential behavior. The exponential factor is universal for all low-lying baryons and baryon-meson scattering states. Simple factorization properties are established for the preexponential term. This factorization agrees with the large-N_c contracted SU(2N_f) spin-flavor symmetry. The consistency of the factorization with the soft-pion theorem for the baryon distribution amplitude is explicitly checked. A relation between the generating functionals for the distribution amplitudes of the nucleon and the Delta resonance is derived. 28 pages |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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