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Simple Physical Approach to Thermal Cutting Rules

P V Landshoff
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Abstract

A first-principles derivation is given of the imaginary part of a Green's function in real-time thermal field theory. The analysis and its conclusions are simpler than in the usual circled-vertex formalism. The relationship to Cutkosky-like cutting rules is explained.

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P V Landshoff. 1996-08-27. Simple Physical Approach to Thermal Cutting Rules. https://doi.org/10.1016/0370-2693(96)00919-7

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