The composite operator TT in sinh-Gordon and a series of massive minimal models
Abstract
The composite operator TT, obtained from the components of the energy-momentum tensor, enjoys a quite general characterization in two-dimensional quantum field theory also away from criticality. We use the form factor bootstrap supplemented by asymptotic conditions to determine its matrix elements in the sinh-Gordon model. The results extend to the breather sector of the sine-Gordon model and to the minimal models M2/(2N+3) perturbed by the operator phi1,3.
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