Regularizing chiral fermion has been a challenge in particle physics and field theory. In lattice regularization, the problem manifests itself as mirror fermions (or doublers) as suggested by the Nielsen-Ninomiya’s theorem. However, this problem is not a technical but fundamental, since it is also closely related to the existence of anomalies.<\/p>\n
On the other hand, we find many examples of chiral fermions in nature. Some of them are realized as the edge-modes which appears at the surface of the of higher dimensional bulk spacetime ( topological insulator, cosmic string, … ). The appearance of extra-dimensions in these remarkable examples can give a hint to formulating chiral fermions.<\/p>\n
In this talk, I review the study of constructing chiral fermions on the lattice and its partial solutions using extra-dimensions. I also explain our recent work in understanding the anomaly structure realized in higher dimensions.<\/p>\n","protected":false},"featured_media":0,"template":"","tags":[],"seminar_category":[55],"acf":{"s_now_accepting":true,"s_date_order":"2017-12-20 17:00:00","s_date_end":null,"s_date_text":"","s_text":"Tetsuya Onogi","s_place":"KMI Science Symposia (ES635)","s_place_other":"","s_categoryother":"","s_poster":"