The mu-term corrections from bound-state quantization are reproduced exactly as residues of the F-term integral for elementary non-diagonal form factors, confirming the connection between the two formalisms.
Diagonal form factors from non-diagonal ones
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We prove the asymptotic large volume expression of diagonal form factors in integrable models by evaluating carefully the diagonal limit of a non-diagonal form factor in which we send the rapidity of the extra particle to infinity.
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Finite volume corrections of non-diagonal form factors
The mu-term corrections from bound-state quantization are reproduced exactly as residues of the F-term integral for elementary non-diagonal form factors, confirming the connection between the two formalisms.