The cusp limit of correlators and a new graphical bootstrap for correlators/amplitudes to eleven loops
Abstract We consider the universal behavior of half-BPS correlators in N $$ \mathcal{N} $$ = 4 super-Yang-Mills in the cusp limit where two consecutive separations x 12 2 $$ {x}_{12}^2 $$ , x 23 2 $$ {x}_{23}^2 $$ become lightlike. Through the Lagrangian insertion procedure, the Sudakov double-logar...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2025-03-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP03(2025)192 |
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| Summary: | Abstract We consider the universal behavior of half-BPS correlators in N $$ \mathcal{N} $$ = 4 super-Yang-Mills in the cusp limit where two consecutive separations x 12 2 $$ {x}_{12}^2 $$ , x 23 2 $$ {x}_{23}^2 $$ become lightlike. Through the Lagrangian insertion procedure, the Sudakov double-logarithmic divergence of the n-point correlator is related to the (n + 1)-point correlator where the inserted Lagrangian “pinches” to the soft-collinear region of the cusp. We formulate this constraint as a new graphical rule for the f-graphs of the four-point correlator, which turns out to be the most constraining rule known so far. By exploiting this single graphical rule, we bootstrap the planar integrand of the four-point correlator up to ten loops (n = 14) and fix all 22024902 but one coefficient at eleven loops (n = 15); the remaining coefficient is then fixed using the triangle rule. We verify the “Catalan conjecture” for the coefficients of the family of f-graphs known as “anti-prisms” where the coefficient of the twelve-loop (n = 16) anti-prism is found to be −42 by a local analysis of the bootstrap equations. We also comment on the implication of our graphical rule for the non-planar contributions. |
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| ISSN: | 1029-8479 |