Starts 26 Nov 2026 16:00
Ends 26 Nov 2026 17:00
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HECAP Seminar by Reig Lopez - Testing Unification and Some String Theories with Axions
Hybrid
Leonardo Building - Euler Lecture Hall and via Zoom
Abstract
The topological nature of axion couplings to gauge bosons offers unique opportunities to obtain information about the UV limit of the SM. I will discuss why the discovery of an axion-like particle above the QCD line--such as an axion inducing cosmic birefringence-- would rule out Grand Unified Theories, both in 4 dimensions and in higher-dimensions, and the perturbative Heterotic String.
Based on 2206.07053, 2410.03820, 2509.08042, and 2606.09982.
Link to Zoom registration
https://zoom.us/meeting/register/xmjyUH9tTkqxP9aA2ZUxdA
The topological nature of axion couplings to gauge bosons offers unique opportunities to obtain information about the UV limit of the SM. I will discuss why the discovery of an axion-like particle above the QCD line--such as an axion inducing cosmic birefringence-- would rule out Grand Unified Theories, both in 4 dimensions and in higher-dimensions, and the perturbative Heterotic String.
Based on 2206.07053, 2410.03820, 2509.08042, and 2606.09982.
Link to Zoom registration
https://zoom.us/meeting/register/xmjyUH9tTkqxP9aA2ZUxdA