Hoạt động khoa học
Seminar
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Seminar Trung tâm Vật lý lý thuyết: | |
| Tên báo cáo | S-matrix Unitarity and Renormalizability |
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| Người trình bày | GS. Keisuke Izumi |
| Cơ quan | Nagoya University, Japan |
| Ngày | Thứ Ba, 17-09-2019 |
| Giờ | 10:00 AM |
| Địa điểm | Phòng 62, Tầng 6, Nhà 2H, 18 Hoàng Quốc Việt, Cầu Giấy, Hà Nội |
| Tóm tắt | We investigate the relation between the S-matrix unitarity and the renormalizability. The relation has been confirmed in many theories, such as gauge theories, Einstein gravity by analyzing the unitarity bound, which follows from the S-matrix unitarity and the norm positivity. We firstly show that the relation holds in Lifshitz-type non-relativistic theories. On the other hand, renormalizable theories with a higher derivative kinetic term do not necessarily satisfy the unitarity bound essentially because of the negative norm states. In these theories, it is not clear if the S-matrix unitarity provides a nontrivial constraint related to the renormalizability. To verify that the norm positivity is irrelevant to the relation between the S-matrix unitarity and the renormalizability, we analyze not the unitarity bound but the S-matrix unitarity itself in scalar field models with a higher derivative kinetic term. |
| Người chủ trì | Hoàng Ngọc Long |