Abstract
The general formula of the π- p atom strong energy-level shift in the 1s state is derived in the next-to-leading order in the isospin breaking, and in all orders in chiral expansion. Isospin-breaking corrections to the level shift are explicitly evaluated at order p2 in ChPT. The results clearly demonstrate the necessity to critically reaccess the values of the π N scattering lengths, extracted from the energy-level shift measurement by means of the potential model-based theoretical analysis. (C) 2000 Elsevier Science B.V.
Original language | English |
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Pages (from-to) | 9-18 |
Number of pages | 10 |
Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 494 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 23 Nov 2000 |
Keywords
- Chiral Perturbation Theory
- Hadronic atoms
- Non-relativistic effective Lagrangians
ASJC Scopus subject areas
- Nuclear and High Energy Physics