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pi(-)p atom in ChPT: strong energy-level shift | | V. E. Lyubovitskij
; A. Rusetsky
; | | Date: |
18 Sep 2000 | | Journal: | Phys.Lett. B494 (2000) 9-18 | | Subject: | hep-ph | | Affiliation: | Tuebingen University and Tomsk University), A. Rusetsky (Bern University and HEPI, Tbilisi University | | Abstract: | The general formula of the pi(-)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 p^2 in ChPT. The results clearly demonstrate the necessity to critically reaccess the values of the piN scattering lengths, extracted from the energy-level shift measurement by means of the potential model-based theoretical analysis. | | Source: | arXiv, hep-ph/0009206 | | Services: | Forum | Review | PDF | Favorites | |
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