7 papers · 1 filter
Soft Algebras via Bulk Double Soft Limits
Sruthi A. Narayanan
Soft and collinear limits of "celestial amplitudes" give rise to infinite dimensional symmetry algebras for two-dimensional (2D) "celestial" conformal field theories (CFTs). A smal…
Memory Correlators and Ward Identities in the 'in-in' Formalism
Ian Moult, Sruthi A. Narayanan, Sabrina Pasterski
The symmetries of asymptotically flat spacetimes impose constraints on observables at infinity. The consequences of this have been extensively explored for S-matrix elements, where…
Marginal Operators from Celestial Diamonds
Michael Imseis, Sruthi A. Narayanan, A. W. Peet
For a given conformal field theory (CFT), one can deform it via the addition of a marginal operator to the spectrum. In two dimensions, when the added operator has conformal weight…
Collinear Corrections to the Cachazo-Strominger Soft Theorem
Eivind Jørstad, Sruthi A. Narayanan
Soft theorems describe the behavior of scattering amplitudes when one or several external particles are taken to be energetically soft. In tree-level gravity there are universal so…
Marginality from Leading Soft Gluons
Sruthi A. Narayanan
Marginal operators in a d-dimensional conformal field theory (CFT), those with conformal dimension , give us information about the space of related theories. This can be incre…
Celestial Gluon Amplitudes from the Outside In
Walker Melton, Sruthi A. Narayanan
We show that, given a two-dimensional realization of the celestial OPE in self-dual Yang-Mills, we can find a scalar source around which scattering amplitudes replicate correlation…