Exact form factors in integrable quantum field theories: the sine-Gordon model
作者： A. Fring , M. Karowski , Hratchya M. Babujian , A. Zapletal
DOI: 10.1016/S0550-3213(98)00737-8
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摘要: We provide detailed arguments on how to derive properties of generalized form factors, originally proposed by one the authors (M.K.) and Weisz twenty years ago, solely based assumption "minimal analyticity" validity LSZ reduction formalism. These constitute consistency equations which allow explicit evaluation n-particle factors once scattering matrix is known. The give rise a Riemann-Hilbert problem. Exploiting "off-shell" Bethe ansatz we propose general formula for an odd number particles. For Sine-Gordon model alias massive Thirring exemplify solution several operators. carry out check three particle factor against perturbation theory thus confirm
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