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arXiv · 1508.07331

Worldsheet scattering for the GKP string

Lorenzo Bianchi·Marco S. Bianchi
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Abstract

We initiate the perturbative study of the S-matrix for the excitations on top of the GKP vacuum at strong coupling. Using the string sigma model action expanded around the null cusp classical solution, we compute the tree-level S-matrix elements and compare them with the predictions from the asymptotic Bethe Ansatz. We also check the factorization of the three-body S-matrix for various bosonic processes, finding precise agreement with the constraints imposed by integrability.

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Lorenzo Bianchi, Marco S. Bianchi. 2015-08-28. Worldsheet scattering for the GKP string. https://doi.org/10.1007/jhep11(2015)178

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