A bstract We study a general class of functionals providing an analytic handle on the
conformal bootstrap equations in one dimension. We explicitly identify the extremal …

We derive a nonperturbative, Lagrangian-level formulation of the double copy in two
spacetime dimensions. Our results elucidate the field theoretic underpinnings of the double …

A bstract In 1968, Atkinson proved the existence of functions that satisfy all S-matrix axioms
in four spacetime dimensions. His proof is constructive and to our knowledge it is the only …

A bstract We explore the S-matrices of gapped, unitary, Lorentz invariant quantum field
theories with a global O (N) symmetry in 1+ 1 dimensions. We extremize various cubic and …

Smirnov and Zamolodchikov recently introduced a new class of two-dimensional quantum
field theories, defined through a differential change of any existing theory by the determinant …

We consider the 2D S-matrix bootstrap in the presence of supersymmetry, Z 2, and Z 4
symmetry. At the boundary of the allowed S-matrix space we encounter well-known …

A bstract String on AdS 3× S 3× T 4 backgrounds are known to be classically integrable in
the presence of a mixture of Ramond-Ramond and Neveu-Schwarz-Neveu-Schwarz fluxes …

A bstract Recently we showed how, in two-dimensional scalar theories, one-loop threshold
diagrams can be cut into the product of one or more tree-level diagrams [1]. Using this …

Motivated by the search for new integrable string models, we study the properties of
massless tree-level S-matrices for 2d-models expanded near the trivial vacuum. We find …

A bstract We investigate the perturbative integrability of massive (1+ 1)-dimensional bosonic
quantum field theories, focusing on the conditions for them to have a purely elastic S-matrix …