We present a consistent derivation of the complete Wess-Zumino-Witten
interactions of axions, including the counter-term necessary to guarantee the
gauge invariance of the Standard Model. By treating the derivative of the axion
field as a background gauge field and incorporating auxiliary chiral rotation
phases, we ensure consistency in the axion-interaction Lagrangian. This
approach...
Certain dimension-8 operator coefficients are subject to positivity bounds, derived from the fundamental principles of Quantum Field Theory, including unitarity, locality, analyticity and Lorentz invariance. In the first part of the talk, I will discuss how these positivity bounds can be probed by LHC or future lepton colliders. In the second part of the talk, I will discuss some of the...
As the theoretical and experimental studies have entered the precision era, I will discuss some of the most well-motivated dark matter models in direct and indirect searches, with special focus on light dark matter.
We will discuss the remaining parameter space for WIMP-like dark matter with thermal relic density, focusing on two scenarios: the small interaction rate region and the small mass region. In the small interaction rate region, we reanalyze the prospects of detecting dark matter annihilation signals in the Galactic Center, particularly near the supermassive black hole (Sgr A*), by examining...
