ABJM amplitudes and WL at finite N

Abstract

We evaluate ABJM observables at two loops, for any value of the rank N of the gauge group. We compute the color subleading contributions to the four-point scattering amplitude in ABJM at two loops. Contrary to the four dimensional case, IR divergent N-subleading contributions are proportional to leading poles in the regularization parameter. We then exploit the non-planar calculation for the amplitude to derive an expression for the two-loop Sudakov form factor at any N. In the planar limit the result coincides with the one recently obtained in literature by using Feynman diagrams and unitarity. Finally, we analyze the subleading contributions to the light-like four-cusps Wilson loop and interpret the result in terms of the non-abelian exponentiation theorem. All these perturbative results satisfy the uniform transcendentality principle, hinting at its validity in ABJM beyond the planar limit.

27 pages, 5 figures, result for ABJ form factor corrected

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Cited by in corpus (11)

• ABJM amplitudes and the positive orthogonal grassmannian
• Cutting through form factors and cross sections of non-protected operators in N=4 SYM
• On-shell Diagrams, Graßmannians and Integrability for Form Factors
• On Form Factors in N=4 SYM Theory and Polytopes
• On the ABJM four-point amplitude at three loops and BDS exponentiation
• Non-planarity through unitarity in ABJM
• Grassmannians and form factors with $q^2=0$ in N=4 SYM theory
• Integrated negative geometries in ABJM
• Four-point amplitudes in $\mathcal{N}=2$ SCQCD
• $\mathcal{N}=3$ Harmonic Super-Wilson Loop
• The canonical form has got baubles