Abstract
We define the vacuum expectation value of the time-ordered product of three exponentials of free massless fields as a continuous linear functional over a suitable test function space using minimal singularity as a criterion.
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References
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Research sponsored by the Alfred P. Sloan Foundation.
On leave from II. Institut für Theoretische Physik der Universität Hamburg, Germany.
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Pohlmeyer, K. Higher order perturbation theory for exponential Lagrangians: Third order. Commun.Math. Phys. 26, 130–148 (1972). https://doi.org/10.1007/BF01645700
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DOI: https://doi.org/10.1007/BF01645700