The energy-momentum tensor in scalar and gauge field theories |
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Authors: | Daniel Z Freedman Erick J Weinberg |
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Institution: | Institute for Advanced Study, Princeton, New Jersey 08540 USA |
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Abstract: | A previous study of the energy-momentum tensor in ?4 theory and spontaneously broken non-Abelian gauge field theories is extended here to show finiteness to all orders in perturbation theory. Divergences of Green's functions Γμν(j) (q; p1, …, pj) involving the energy-momentum tensor θμν and j particle fields are removed by counterterms of the ordinary Lagrangian plus a renormalization of the coefficient of the Callan-Coleman-Jackiw improvement term in θμν. Physically the extra renormalization means that the mean square “mass radius” of elementary spin zero particles must be specified from experiment. |
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