Abstract
We apply the perturbative chiral quark model to the study of the low-energy πN interaction. Using an effective chiral Lagrangian we reproduce the Weinberg-Tomozawa result for the S-ware πN scattering lengths. After inclusion of the photon field we give predictions for the electromagnetic O(p2) low-energy couplings of the chiral perturbation theory effective Lagrangian that define the electromagnetic mass shifts of nucleons and first-order (e2) radiative corrections to the πN scattering amplitude. Finally, we estimate the leading isospinbreaking correction to the strong energy shift of the π-p atom in the 1s state, which is relevant for the experiment "pionic hydrogen" at PSI.
| Original language | English |
|---|---|
| Pages (from-to) | 252021-2520210 |
| Number of pages | 2268190 |
| Journal | Physical Review C - Nuclear Physics |
| Volume | 65 |
| Issue number | 2 |
| Publication status | Published - Feb 2002 |
| Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Nuclear and High Energy Physics
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Lyubovitskij, V. E., Gutsche, T., Faessler, A., & Vinh Mau, R. (2002). Electromagnetic couplings of the chiral perturbation theory Lagrangian from the perturbative chiral quark model. Physical Review C - Nuclear Physics, 65(2), 252021-2520210.