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Australian Journal of Physics Australian Journal of Physics Society
A journal for the publication of original research in all branches of physics
PREFACE

Preface: Quarks, hadrons and nuclei


Australian Journal of Physics 50(1) I - 1
Published: 1997

Abstract

The Bethe–Salpeter equation (BSE) for bound states in scalar theories is reformulated and solved in terms of a generalized spectral representation directly in Minkowski space. This differs from the conventional approach, where the BSE is solved in Euclidean space after a Wick rotation. For all but the lowest-order (i.e. ladder) approximation to the scattering kernel, the naive Wick rotation is invalid. Our approach generates the vertex function and Bethe–Salpeter amplitude for the entire allowed range of momenta, whereas these cannot be directly obtained from the Euclidean space solution. Our method is quite general and can be applied even in cases where the Wick rotation is not possible.

https://doi.org/10.1071/PHv50n1_PR

© CSIRO 1997

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