On the Amplitude/Wilson Loop duality in N=2 SCQCD

2015/02/26 by Marta Leoni, Leoni, Marta, Andrea Mauri +3
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #FOS: Physical sciences #High Energy Physics - Theory (hep-th) #Quantum Chromodynamics and Particle Interactions #hep-th

paper · pdf · doi:10.48550/arxiv.1502.07614

17 pages; v2: a comment on the Regge limit of the final result and references added; v3: minor corrections; v4: published shorter version matching Phys.Lett. B standards

openalex publication_date 2015/02/26 · arxiv created 2015/06/12 · arxiv updated 2015/06/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We compute the four-point amplitude with external adjoint particles in N=2 SCQCD at two loops using N=1 superspace Feynman diagrams, extending the results of arXiv:1406.7283. We consider the diagrammatic difference with the corresponding process of N=4 SYM finding a non vanishing result, which is a non trivial function of the kinematic variables. This demonstrates that in N=2 SCQCD, even in the sector with external particles in the vector multiplet, the amplitude/Wilson loop duality is inevitably broken at two loops.

Citations

• DGLAP and BFKL evolution equations in the N=4 supersymmetric gauge theory
• Four-point amplitudes in N=2 SCQCD

Related

• A Note on Loop Amplitudes in QED
• Wilson loops as defects in N=2 conformal field theories
• Descent equations for superamplitudes
• Pentagon Wilson loop with Lagrangian insertion at two loops in \mathcal N=4 super Yang-Mills theory
• Two-loop four-point amplitudes on the Coulomb branch of N=4 super Yang-Mills