Theory Division

The absence of confirmed signal in dark matter (DM) direct detection (DD) may suggest weak interaction strengths between DM and the abundant constituents inside nucleon, i.e. gluons and valence light quarks. In this work we consider a real scalar dark matter $S$ interacting only with $SU(2)_L$ singlet Up-type quarks $U_i=u_R,c_R,t_R$ via a vector-like fermion $\psi$.... More »

Dark sectors are ubiquitous in physics beyond the Standard Model (SM), and may play a role  in explaining many of the long-standing problems of the SM such as the existence of dark matter or the electroweak hierarchy problem.  By definition, dark sectors are not charged under any of the known forces. Discovering their possible existence... More »

Neutrinoless double-beta decay, as a lepton-number violating process, has been the focus of numerous experimental and theoretical investigations in recent years. While it proves that neutrinos are Majorana particles once observed, the underlying new physics responsible for this process can only be constrained if the theoretical predictions of the rate are substantially refined. This talk... More »