Elli Pomoni 教授学术报告

Title: Hidden Symmetries of 4D N=2 Gauge Theories

Speaker: Elli Pomoni

Affiliation: Humboldt University and DESY, Germany（德国汉堡大学及电子同步加速器中心）

Time: 16:00-17:00, Friday, February 27th, 2026 (UTC+8, Beijing Time)

Venue: Zoom Meeting (ID: 385 442 0225; Passcode: yauc)

Inviter: Ryo Suzuki

Abstract

In this talk we will study the global symmetries of orbifolds of N = 4 Super-Yang-Mills theory and their marginal deformations. The process of orbifolding to obtain an N = 2 theory would appear to break the SU(4) R-symmetry down to SU(2)×U(1). We show that the broken generators can be recovered by moving beyond the Lie algebraic setting to that of a Lie algebroid. This remains true when marginally deforming away from the orbifold point by allowing the different gauge couplings to vary independently. The information about the marginal deformation is captured by a Drinfeld-type twist of this SU(4) Lie algebroid. The twist is read off from the F- and D- terms, and thus directly from the Lagrangian. We will show that the planar Lagrangian of the theory is invariant under this twisted version of the SU(4) algebroid and discuss implications of this hidden symmetry for the spectrum of the N = 2 theories.

Speaker

Prof. Elli Pomoni earned her PhD in 2010 at Stony Brook under Leonardo Rastelli and held postdoctoral positions at Humboldt University and DESY. She is now staff at DESY and professor at Hamburg University. Her research spans supersymmetric gauge theories, topological strings, integrability, conformal bootstrap, and exact non-perturbative quantum field theory.

The seminar will be broadcasted online by Zoom.

Interested people are free to join, without registration in advance.

The Zoom info is

URL: https://us02web.zoom.us/j/3854420225?pwd=SXY4eWJKOTBFZWJDaE16aXpTamY1QT09

Meeting ID: 385 442 0225

Passcode: yauc