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Calendar of Physics Talks Vienna
| Defects, generalized symmetries, and marginal deformations |
| Speaker: | Giovanni Galati (University of Brussels) |
| Abstract: | Extended operators, or defects, play a prominent role in Quantum Field Theory, as they impose additional constraints on the theory and provide powerful tools to model experimental setups such as impurities, interfaces, and boundaries.
In this talk, I will discuss how the generalized global symmetries of a given system can provide non-perturbative constraints on the space of extended defects, both in massive and conformal field theories. Focusing on 2d CFTs, I will argue that the existence of certain exactly marginal defect deformations can be predicted by analyzing subtle ways in which generalized symmetries arise in this setting. Time permitting, I will also explain how some bulk marginal deformations can emerge from the same mechanism. |
| Date: | Tue, 12.05.2026 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Erwin-Schroedinger-HS, Boltzmanngasse 5, 1090 Wien, 5.Stock |
| Contact: | S. Fredenhagen, M. Sperling |
| Higgs mass limits from near-criticality |
| Speaker: | María Belén GAVELA LEGAZPI (Universidad Autónoma de Madrid) |
| Abstract: | After reminding the basic concept of Higgs near-criticality, strong bounds on the Higgs mass obtained recently will be discussed and compared within different contexts: the Majoron model and the axion-like particle (ALP) Lagrangian (the concept of axions and ALPs will be introduced previously). The ALP-SMEFT connection versus near-criticality will be discussed as well. Beyond the theoretical constructions, the expected impact at future colliders, flavour experiments and cosmological observations will be presented. |
| Date: | Tue, 12.05.2026 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Erwin-Schroedinger-HS, Boltzmanngasse 5, 1090 Wien, 5.Stock |
| Contact: | A. Hoang, M. Procura, J. Pradler |
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