Date: May 28th, 9:00AM(JST)
Speaker: Nobuchika Okada (The University of Alabama)
Title: The Domain-Wall Standard Model: Construction and Phenomenological Implications
Abstract: In this talk, I will present the Domain-Wall Standard Model, a framework formulated in a non-compact five-dimensional spacetime. In this setup, all Standard Model (SM) fields are dynamically localized on domain walls along the extra spatial dimension, so that the four-dimensional SM emerges as the low-energy effective theory. In addition to the SM fields, the effective theory contains Kaluza-Klein (KK) excitations of SM particles and a Nambu?Goldstone (NG) boson associated with the spontaneous breaking of translational invariance in the fifth dimension. These features give rise to a variety of novel phenomenological signatures. After outlining the model's construction, I will focus on its phenomenological implications, including:
- Signatures of KK gauge bosons at the Large Hadron Collider (LHC);
- The impact of KK fermions and gauge bosons on Higgs boson production and decay at the LHC;
- Searches for KK fermions via their decays into SM fermions and the NG boson.
I will also discuss astrophysical and cosmological constraints on the existence of the NG boson.