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hep-ph1998
Theory of the pi+ pi- atom
M. A. Ivanov, V. E. Lyubovitskij, E. Z. Lipartia +1
The relativistic perturbative approach based on the Bethe-Salpeter (BS) equation is developed for the study of the characteristics of the hadronic pi+ pi- atom. The general express…
nucl-th1998
Heavy Meson Observables and Dyson-Schwinger Equations
M. A. Ivanov, Yu. L. Kalinovsky, P. Maris +1
Dyson-Schwinger equation (DSE) studies show that the b-quark mass-function is approximately constant, and that this is true to a lesser extent for the c-quark. These observations p…
hep-ph1998
pi+pi- Atom in Chiral Theories
M. A. Ivanov, V. E. Lyubovitskij, E. Z. Lipartia +1
We review the existing theoretical approaches to the study of the observables of hadronic atoms. In the relativistic perturbative approach based on the Bethe-Salpeter equation and…