On the massless tree-level S-matrix in 2d sigma models
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DOI: 10.1088/1751-8121/ab0b79
Abstract: Motivated by the search for new integrable string models, we study the properties of massless tree-level S-matrices for 2d sigma models expanded near the trivial vacuum. We find that, in contrast to the standard massive… read more here.
Keywords: tree level; level; massless tree; model ... See more keywords