We derive the S-matrix for the (2, 1; α)**2 symmetric spin-chain of AdS3/CFT2 by considering the centrally extended su(1|1)**2 algebra acting on the spin-chain excitations. The S-matrix is determined uniquely up to four scalar factors, which are further constrained by a set of crossing relations. The resulting scattering includes non-trivial processes between magnons of different masses that were previously overlooked.
A dynamic su(1|1)**2 S-matrix for AdS3/CFT2
Sfondrini A.
2013
Abstract
We derive the S-matrix for the (2, 1; α)**2 symmetric spin-chain of AdS3/CFT2 by considering the centrally extended su(1|1)**2 algebra acting on the spin-chain excitations. The S-matrix is determined uniquely up to four scalar factors, which are further constrained by a set of crossing relations. The resulting scattering includes non-trivial processes between magnons of different masses that were previously overlooked.
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