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Effective Lagrangians in bound state calculations

V. Antonelli·A. Gall·J. Gasser·A. Rusetsky
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Abstract

In order to investigate specific aspects of bound state calculations in a non-relativistic framework, we consider the energy-levels of a massive scalar particle, which moves in an external field and interacts in addition with a massless scalar particle. The discussion includes the following topics: dimensionally regularized bound-state calculations, ultraviolet finiteness of bound-state observables and their independence of the off-mass-shell behavior of Green functions, non-renormalizable interactions, structure of the non-relativistic two-point function, power counting and matching.

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V. Antonelli, A. Gall, J. Gasser, A. Rusetsky. 2000-03-13. Effective Lagrangians in bound state calculations. https://doi.org/10.1006/aphy.2000.6084

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