MESONS AND THE STRUCTURE OF NUCLEONS. PART III. PION-NUCLEON SCATTERING

Journal Article · Tue Mar 01 04:00:00 EST 1960 · Annals of Physics (New York) (U.S.)

DOI:https://doi.org/10.1016/0003-4916(60)90038-5· OSTI ID:4184382

Costa, G; Feld, B T

The "atomic" model of the physical nucleons was used in a direct computation of the scattering of free pions by nucleons. The computation is analogous to the computation of the scattering of electrons by hydrogen atoms. Neglecting any pion-pion interaction, p-wave scattering phase shifts are computed in the Born approximation and also by an improved technique, for various assumptions concerning the interaction between a pion and the nucleon "core". The model is shown to be capable of reproducing the resonant scattering in the (3,3) isobar state, while predicting much smaller phase shifts for the other states. The results differ from the Chew-Low theory for the Born approximation in that a small, positive phase-shift for scattering in the (1,1) state is predicted; the experiments appear to favor the prediction. It is concluded that the same pion-nucleon interaction, which accounts for the properties of the ground (physical) nucleon state. leads to the observed low-energy pion-nucleon scattering. (auth)

• Research Organization: Massachusetts Inst. of Tech., Cambridge
• NSA Number: NSA-14-010972
• OSTI ID: 4184382
• Journal Information: Annals of Physics (New York) (U.S.), Journal Name: Annals of Physics (New York) (U.S.) Vol. Vol: 9; ISSN APNYA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ATOMS
BORN APPROXIMATION
ELECTRONS
HYDROGEN
INTERACTIONS
MESONS
NUCLEAR STRUCTURE
NUCLEONS
PARTICLE MODELS
PERTURBATION THEORY
PHYSICS
PIONS
RESONANCE
SCATTERING
SPECTRAL SHIFT