235 citations · 525 across the 6 of their papers we have counts for
22 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…
Preheating from target space curvature and unitarity violation: Analysis in field space
Yohei Ema, Ryusuke Jinno, Kazunori Nakayama +1
We study particle production and unitarity violation caused by a curved target space right after inflation. We use the inflaton field value instead of cosmic time as the time varia…
Axion assisted Schwinger effect
Valerie Domcke, Yohei Ema, Kyohei Mukaida
We point out an enhancement of the pair production rate of charged fermions in a strong electric field in the presence of time dependent classical axion-like background field, whic…
Neutrino experiments probe hadrophilic light dark matter
Yohei Ema, Filippo Sala, Ryosuke Sato
We use Super-K data to place new strong limits on interactions of sub-GeV Dark Matter (DM) with nuclei, that rely on the DM flux inevitably induced by cosmic-ray upscatterings. We…
Renormalization Group Equations of Higgs- Inflation
Yohei Ema, Kyohei Mukaida, Jorinde van de Vis
We derive one- and two-loop renormalization group equations (RGEs) of Higgs- inflation. This model has a non-minimal coupling between the Higgs and the Ricci scalar and a Ricc…
Dark matter models for the 511 keV galactic line predict keV electron recoils on Earth
Yohei Ema, Filippo Sala, Ryosuke Sato
We propose models of Dark Matter that account for the 511 keV photon emission from the Galactic Centre, compatibly with experimental constraints and theoretical consistency, and wh…