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• W4313232397 abstract "A bstract We study a scalar component of the 8-point next-to-next-to-maximally-helicity-violating (N 2 MHV) amplitude at two-loop level in $$ mathcal{N} $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>N</mml:mi> </mml:math> = 4 super-Yang-Mills theory; it has a leading singularity proportional to the inverse of the four-mass-box square root and receives contributions from only two types of non-trivial integrals with one-loop infrared (IR) divergences. We compute such two-loop 8-point integrals by taking (double-)collinear limits of certain finite, dual-conformal-invariant integrals, and they nicely give the IR-safe ratio function after subtracting divergences. As the first genuine two-loop N 2 MHV amplitude computed explicitly, we find remarkable structures in its symbol and alphabet: similar to the next-to-MHV (NMHV) case, there are still 9 algebraic letters associated with the square root, and the latter also becomes a letter for the first time; unlike the NMHV case, such algebraic letters appear at either one or all of the second, third and last entry, and the part with three odd letters is particularly simple." @default.
• W4313232397 created "2023-01-06" @default.
• W4313232397 creator A5023543729 @default.
• W4313232397 creator A5080872035 @default.
• W4313232397 creator A5088141052 @default.
• W4313232397 date "2022-12-28" @default.
• W4313232397 modified "2023-10-14" @default.
• W4313232397 title "A nice two-loop next-to-next-to-MHV amplitude in $$ mathcal{N} $$ = 4 super-Yang-Mills" @default.
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• W4313232397 doi "https://doi.org/10.1007/jhep12(2022)158" @default.
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