Asymptotic factorisation of form factors in two-dimensional quantum field theory
G. Delfino, P. Simonetti, J. L. Cardy
Abstract
It is shown that the scaling operators in the conformal limit of a two-dimensional field theory have massive form factors which obey a simple factorisation property in rapidity space. This has been used to identify such operators within the form factor bootstrap approach. A sum rule which yields the scaling dimension of such operators is also derived.
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