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We extend the study of the recently discovered Yangian symmetry of massive Feynman integrals and its relation to massive momentum space conformal symmetry. After proving the symmetry statements in detail at one and two loop orders, we…

High Energy Physics - Theory · Physics 2021-07-27 Florian Loebbert , Julian Miczajka , Dennis Müller , Hagen Münkler

Yangian-type differential operators are shown to constrain Feynman integrals beyond the restriction to integrable graphs. In particular, we prove that all position-space Feynman diagrams at tree level feature a Yangian level-one momentum…

High Energy Physics - Theory · Physics 2025-02-04 Florian Loebbert , Harshad Mathur

We prove the invariance of scalar Feynman graphs of any planar topology under the Yangian level-one momentum symmetry given certain constraints on the propagator powers. The proof relies on relating this symmetry to a planarized version of…

High Energy Physics - Theory · Physics 2025-10-17 Florian Loebbert , Lucas Rüenaufer , Sven F. Stawinski

Recently, infinite families of massive Feynman integrals were found to feature an unexpected Yangian symmetry. In the massless case, similar integrability properties are understood via the interpretation of individual Feynman integrals as…

High Energy Physics - Theory · Physics 2021-01-15 Florian Loebbert , Julian Miczajka

We give a brief overview of the Yangian symmetry of Feynman integrals. After a short introduction to the Yangian and integrability, we motivate the emergence of integrable structures for Feynman integrals via the fishnet limit of AdS/CFT.…

High Energy Physics - Theory · Physics 2024-01-09 Florian Loebbert

We present significant evidence that the powerful property of Yangian invariance extends to a new large class of conformally invariant Feynman integrals. Our results apply to planar Feynman diagrams in any spacetime dimension dual to an…

High Energy Physics - Theory · Physics 2025-07-01 Vladimir Kazakov , Fedor Levkovich-Maslyuk , Victor Mishnyakov

We explore the idea to bootstrap Feynman integrals using integrability. In particular, we put the recently discovered Yangian symmetry of conformal Feynman integrals to work. As a prototypical example we demonstrate that the D-dimensional…

High Energy Physics - Theory · Physics 2021-01-20 Florian Loebbert , Dennis Müller , Hagen Münkler

Feynman integrals with generic propagator powers in one and two spacetime dimensions are investigated from various perspectives. In particular, we argue that the class of track integrals at any loop order is fixed by the recently found…

High Energy Physics - Theory · Physics 2026-03-31 Gwenaël Ferrando , Florian Loebbert , Amelie Pitters , Sven F. Stawinski

An overview of the massive generalization of Yangian symmetry for Feynman integrals is given. We illustrate the relation to a massive fishnet theory defined as a double-scaling limit of Coulomb-branch N=4 SYM theory.

High Energy Physics - Theory · Physics 2021-09-27 Florian Loebbert , Julian Miczajka

In this letter we establish Yangian symmetry of planar N=4 super-Yang-Mills theory. We prove that the classical equations of motion of the model close onto themselves under the action of Yangian generators. Moreover we propose an off-shell…

High Energy Physics - Theory · Physics 2017-04-13 Niklas Beisert , Aleksander Garus , Matteo Rosso

We perform a detailed study of the Yangian symmetry of smooth supersymmetric Maldacena-Wilson loops in planar N=4 super Yang-Mills theory. This hidden symmetry extends the global superconformal symmetry present for these observables. A…

High Energy Physics - Theory · Physics 2016-01-05 Niklas Beisert , Dennis Muller , Jan Plefka , Cristian Vergu

We show that dual conformal symmetry, mainly studied in planar $\mathcal N = 4$ super-Yang-Mills theory, has interesting consequences for Feynman integrals in nonsupersymmetric theories such as QCD, including the nonplanar sector. A simple…

High Energy Physics - Theory · Physics 2017-12-06 Zvi Bern , Michael Enciso , Harald Ita , Mao Zeng

The computational technique of $N$-fold Mellin-Barnes (MB) integrals, presented in a companion paper by the same authors, is used to derive sets of series representations of the massive one-loop conformal 3-point Feynman integral in various…

High Energy Physics - Theory · Physics 2021-05-19 B. Ananthanarayan , Sumit Banik , Samuel Friot , Shayan Ghosh

Various classes of fishnet Feynman graphs are shown to feature a Yangian symmetry over the conformal algebra. We explicitly discuss scalar graphs in three, four and six spacetime dimensions as well as the inclusion of fermions in four…

High Energy Physics - Theory · Physics 2018-05-08 Dmitry Chicherin , Vladimir Kazakov , Florian Loebbert , Dennis Müller , De-liang Zhong

We explore the correspondence between one-loop Feynman integrals and (hyperbolic) simplicial geometry to describe the "all-mass" case: integrals with generic external and internal masses. Specifically, we focus on $n$-particle integrals in…

High Energy Physics - Theory · Physics 2020-08-26 Jacob L. Bourjaily , Einan Gardi , Andrew J. McLeod , Cristian Vergu

The maximally supersymmetric Yang-Mills theory in four-dimensional Minkowski space is an exceptional model of mathematical physics. Even more so in the planar limit, where the theory is believed to be integrable. In particular, the…

High Energy Physics - Theory · Physics 2018-11-16 Nils Kanning

We show the three-loop integrability of large N plane-wave matrix theory in a subsector of states comprised of two complex light scalar fields. This is done by diagonalizing the theory's Hamiltonian in perturbation theory and taking the…

High Energy Physics - Theory · Physics 2010-04-05 Thomas Klose , Jan Plefka

We study the differential equations that follow from Yangian symmetry which was recently observed for a large class of conformal Feynman graphs, originating from integrable `fishnet' theories. We derive, for the first time, the explicit…

High Energy Physics - Theory · Physics 2024-12-30 Fedor Levkovich-Maslyuk , Victor Mishnyakov

We establish an all-loop conformal Yangian symmetry for the full set of planar amplitudes in the recently proposed integrable bi-scalar field theory in four dimensions. This chiral theory is a particular double scaling limit of…

High Energy Physics - Theory · Physics 2018-05-08 Dmitry Chicherin , Vladimir Kazakov , Florian Loebbert , Dennis Müller , De-liang Zhong

Scattering amplitudes in planar N=4 super Yang-Mills theory reveal a remarkable symmetry structure. In addition to the superconformal symmetry of the Lagrangian of the theory, the planar amplitudes exhibit a dual superconformal symmetry.…

High Energy Physics - Theory · Physics 2015-05-20 J. M. Drummond
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