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Soft Algebras for Leaf Amplitudes

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arxiv 2402.04150 v1 pith:5MCR6YKN submitted 2024-02-06 hep-th

classification hep-th
keywords leafamplitudessoftamplitudecelestialthree-pointalgebraalgebras
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

Celestial MHV amplitudes are comprised of non-distributional leaf amplitudes associated to an AdS$_3$ leaf of a foliation of flat spacetime. It is shown here that the leaf amplitudes are governed by the same infinite-dimensional soft `$S$-algebra' as their celestial counterparts. Moreover, taking the soft limit of the smooth three-point MHV leaf amplitude yields a nondegenerate minus-minus two-point leaf amplitude. The two- and three-point MHV leaf amplitudes are used to compute the plus-minus-minus leaf operator product coefficients.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Conformal Partial Wave Expansion of Celestial Correlators

    hep-th 2025-02 conditional novelty 7.0 of 10

    Celestial correlators in Minkowski space admit conformal partial wave expansions with meromorphic spectral densities, enabling conformal block expansions that simplify dramatically for massless scalars.

  2. MHV leaf amplitudes from parafermions

    hep-th 2025-01 conditional novelty 6.0 of 10

    A dual 2D CFT description of MHV leaf amplitudes using non-compact parafermions is shown to reproduce the known dressed Liouville realization.

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