A free-field 2d CFT realization of the chiral bms4 algebra is constructed, with vertex operators for graviton and scalar primaries whose OPEs exactly reproduce those from conformal gravity MHV amplitudes.
A Mathematica package for computing operator product expansions
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Primary charged and neutral spin-4 currents are identified in the Grassmannian-like coset model by extracting the second-order poles in OPEs of charged-neutral and neutral-neutral spin-3 currents.
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Celestial dual of conformal gravity MHV amplitudes: an OPE analysis
A free-field 2d CFT realization of the chiral bms4 algebra is constructed, with vertex operators for graviton and scalar primaries whose OPEs exactly reproduce those from conformal gravity MHV amplitudes.
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A Charged and Neutral Spin-$4$ Currents in the Grassmannian-like Coset Model
Primary charged and neutral spin-4 currents are identified in the Grassmannian-like coset model by extracting the second-order poles in OPEs of charged-neutral and neutral-neutral spin-3 currents.