Results 11 to 20 of about 27,267 (153)

Celestial Berends-Giele current

Journal of High Energy Physics, 2023
Celestial amplitude plays an important role in the understanding of holography. Computing celestial amplitudes by recursion can deepen our understanding of the structure of celestial amplitudes.
Yi-Xiao Tao
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Celestial geometry

Journal of High Energy Physics, 2022
Celestial holography expresses S $$ \mathcal{S} $$ -matrix elements as correlators in a CFT living on the night sky. Poincaré invariance imposes additional selection rules on the allowed positions of operators.
Sebastian Mizera, Sabrina Pasterski
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Celestial recursion

Journal of High Energy Physics, 2023
We examine the BCFW recursion relations for celestial amplitudes and how they inform the celestial bootstrap program. We start by recasting the celestial incarnation of the BCFW shift as a generalization of the action of familiar asymptotic symmetries on
Yangrui Hu, Sabrina Pasterski
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Celestial amplitude for 2d theory

Journal of High Energy Physics, 2022
We explore celestial amplitude corresponding to 2d bulk S $$ \mathcal{S} $$ -matrix. We consider scalar particles with identical mass and show that the celestial amplitude becomes the fourier transform of the 2d S $$ \mathcal{S} $$ -matrix written in the
Sarthak Duary
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Celestial diamonds: conformal multiplets in celestial CFT

Journal of High Energy Physics, 2021
We examine the structure of global conformal multiplets in 2D celestial CFT. For a 4D bulk theory containing massless particles of spin s = 0 1 2 1 3 2 2 $$ \left\{0,\frac{1}{2},1,\frac{3}{2},2\right\} $$ we classify and construct all SL(2,ℂ) primary ...
Sabrina Pasterski, Andrea Puhm, Emilio Trevisani   +2 more
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The Grassmannian for celestial superamplitudes [PDF]

Journal of High Energy Physics, 2021
Recently, scattering amplitudes in four-dimensional Minkowski spacetime have been interpreted as conformal correlation functions on the two-dimensional celestial sphere, the so-called celestial amplitudes.
Livia Ferro, Robert Moerman
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Shadow celestial amplitudes

Journal of High Energy Physics, 2023
We study scattering amplitudes in the shadow conformal primary basis, which satisfies the same defining properties as the original conformal primary basis and has many advantages over it. The shadow celestial amplitudes exhibit locality manifestly on the
Chi-Ming Chang, Wei Cui, Wen-Jie Ma, Hongfei Shu, Hao Zou   +4 more
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Eikonal approximation in celestial CFT [PDF]

Journal of High Energy Physics, 2023
We identify an eikonal regime in celestial CFT2 in which massless 2-2 scattering is dominated by t-channel exchange. We derive a formula for the celestial amplitude that resums exchanges of arbitrary integer spin to all orders in the coupling.
Leonardo Pipolo de Gioia, Ana-Maria Raclariu   +1 more
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Multicollinear singularities in celestial CFT

Journal of High Energy Physics, 2023
The purpose of this paper is to study the holomorphic multicollinear limit of (celestial) amplitudes and use it to further investigate the double residue condition for (hard celestial) amplitudes and the celestial operator product expansion. We first set
Adam Ball, Yangrui Hu, Sabrina Pasterski
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Massive celestial amplitudes and celestial amplitudes beyond four points

Journal of High Energy Physics
We compute scalar three-point celestial amplitudes involving two and three massive scalars. The three-point coefficient of celestial amplitudes with two massive scalars contains a hypergeometric function, and the one with three massive scalars can be ...
Reiko Liu, Wen-Jie Ma
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