Finite temperature correlation functions from form factors

Details Finite temperature correlation functions from form factors Finite temperature correlation functions from form factors

2002-03-14

arxiv.org/abs/hep-th/0203130v2

Nucl.Phys. B636 (2002) 611-631

Physics

High Energy Physics

High Energy Physics - Theory

22 pages Latex, 3 figures

Scientific paper

We investigate proposals of how the form factor approach to compute correlation functions at zero temperature can be extended to finite temperature. For the two-point correlation function we conclude that the suggestion to use the usual form factor expansion with the modification of introducing dressing functions of various kinds is only suitable for free theories. Dynamically interacting theories require a more severe change of the form factor program.

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