Electromagnetic couplings of the chiral perturbation theory Lagrangian from the perturbative chiral quark model

V. E. Lyubovitskij, Th Gutsche, Amand Faessler, R. Vinh Mau

Research output: Contribution to journalArticle

36 Citations (Scopus)

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 languageEnglish
Pages (from-to)252021-2520210
Number of pages2268190
JournalPhysical Review C - Nuclear Physics
Volume65
Issue number2
Publication statusPublished - Feb 2002
Externally publishedYes

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electromagnetic coupling
quark models
perturbation theory
electromagnetism
shift
nucleons
scattering amplitude
energy
inclusions
photons
hydrogen
estimates
predictions
scattering
atoms
interactions

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics

Cite this

Electromagnetic couplings of the chiral perturbation theory Lagrangian from the perturbative chiral quark model. / Lyubovitskij, V. E.; Gutsche, Th; Faessler, Amand; Vinh Mau, R.

In: Physical Review C - Nuclear Physics, Vol. 65, No. 2, 02.2002, p. 252021-2520210.

Research output: Contribution to journalArticle

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