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Journey Towards Asymptotically Safe Standard Model and Unexploded Higgs: from Large N_f to Large Q
06/26
2023
Seminar
- Title Journey Towards Asymptotically Safe Standard Model and Unexploded Higgs: from Large N_f to Large Q
- Speaker Zhi-Wei Wang(UESTC)
- Date 14:30 Jun. 26, 2023
- Venue Room 6620, ITP South Building
Abstract
Solving QFT is key to a more profound understanding of present and next generation of theories of Nature. In fact, both the large number-of-flavour 1/Nf and charge 1/Q expansion have been useful tools to go beyond Feynman diagrammatic computations. In this talk, I will discuss not only the theoretical perspectives of these two methods but, in particular, also their important applications in particle physics phenomenology. I will show that by using the large number-of-flavour 1/Nf summation techniques, the Standard Model can achieve an interacting ultraviolet fixed point to be asymptotically safe, addressing the famous UV Landau Pole problem. We have also applied this method to Grand Unified Theories to explore the safety possibility of Pati-Salam model and Trinification model. On the other hand, the large charge 1/Q approach may have the potential to address the multi-Higgs production problem. I will show that by implementing the large charge 1/Q approach, we can determine the scaling dimensions of a class of fixed charge operators to the next-to-leading-order in the charge expansion but to all orders in their couplings.
Inviter：
Tian-Jun Li