2026/05/20(Wed) 11:00 -12:30 五樓第一會議室 5F, 1st Meeting Room
Title
Dark Photon Phenomenology: From Minicharged Particles to Dark Matter
Speaker
高橋史宜特聘教授 (日本東北大學物理學系) Distinguished Professor Fuminobu Takahashi (Tohoku University, Japan)Abstract
The dark photon is one of the simplest and most versatile extensions of the Standard Model, with markedly different phenomenology in the massless and massive limits. In this talk, I will discuss two recent developments in dark photon physics. First, I will consider light minicharged particles associated with a massless dark photon. In this framework, anomaly cancellation imposes highly nontrivial constraints on chiral charge assignments, and these conditions can be related to the Prouhet–Tarry–Escott problem in number theory. I will show that this framework predicts a doublet structure of the minicharged particles. I will then turn to the massive case and discuss light dark photon dark matter, focusing on a general cosmological bound in scenarios where the dark photon mass is generated through spontaneous symmetry breaking. Together, these examples illustrate how theoretical consistency, mathematical structure, and cosmological constraints shape the viable parameter space of dark photon models.
Language
演講語言 (Language): in English