S-matrices and bi-linear sum rules of conserved charges in affine Toda field theories
Abstract
The exact quantum S-matrices and conserved charges are known for affine Toda field theories(ATFTs). In this note we report on a new type of bi-linear sum rules of conserved quantities derived from these exact S matrices. They exist when there is a multiplicative identity among S-matrices of a particular ATFT. Our results are valid for simply laced as well as non-simply laced ATFTs. We also present a few explicit examples.
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