29 citations · 66 across the 4 of their papers we have counts for
4 papers
Heavy Neutral Leptons from Stopped Muons and Pions
Yohei Ema, Zhen Liu, Kun-Feng Lyu +1
Stopped muons, which are generic in pion-at-rest experiments, can shed light on heavy neutral leptons (HNLs) in unexplored parameter spaces. If the HNL is lighter than the muon, th…
Reevaluation of heavy-fermion-induced electron EDM at three loops
Yohei Ema, Ting Gao, Maxim Pospelov
Motivated by improved limits on electric dipole moments (EDMs), we revisit the three-loop light-by-light mechanism that transmits violation from a heavy fermion to a light one…
Scalar field couplings to quadratic curvature and decay into gravitons
Yohei Ema, Kyohei Mukaida, Kazunori Nakayama
Any field, even if it lives in a completely hidden sector, interacts with the visible sector at least via the gravitational interaction. In this paper, we show that a scalar field…
Nonthermal Gravitino Production after Large Field Inflation
Yohei Ema, Kyohei Mukaida, Kazunori Nakayama +1
We revisit the nonthermal gravitino production at the (p)reheating stage after inflation. Particular attention is paid to large field inflation models with a symmetr…