Space-Time Description of Collision and Decay Processes
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概要
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On the basis of Lorentz invariance and the existence of the vacuum, scattering amplitudes are expressed in terms of Wightman functions. It is done with the aid of observation functions, four-dimensional wave packets vanishing outside the space-time regions of observation of colliding particles. Restrictions must be imposed on each of these regions in order to assure the one-particle character of observed particles, which may be either stable or unstable. Our expression, in a form modified under the additional assumption of microcausality, is compared with that of Lehmann, Symanzik and Zimmermann and the physical meaning of the asymptotic condition is clarified. Extension of our method of description to processes involving composite particles is given, and some relativistic problems concerned with unstable particles are also discussed from the above space-time point of view.
- 理論物理学刊行会の論文
- 1960-12-25
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