59 citations · 195 across the 10 of their papers we have counts for
6 papers · 1 filter
First results from a hidden photon dark matter search in the meV sector using a plane-parabolic mirror system
Stefan Knirck, Takayuki Yamazaki, Yoshiki Okesaku +3
We report on the first results from a new dish antenna search for hidden photon dark matter (HPDM) in the meV mass region. A double mirror system composed of a plane and a paraboli…
Probing Physics in Vacuum Using an X-ray Free-Electron Laser, a High-Power Laser, and a High-Field Magnet
T. Inada, T. Yamazaki, T. Yamaji +5
A nonlinear interaction between photons is observed in a process that involves charge sources. To observe this process in a vacuum, there are a growing number of theoretical and ex…
Search for Two-Photon Interaction with Axionlike Particles Using High-Repetition Pulsed Magnets and Synchrotron X Rays
T. Inada, T. Yamazaki, T. Namba +12
We report on new results of a search for two-photon interaction with axionlike particles (ALPs). The experiment was carried out at a synchrotron radiation facility using a "light s…
First direct measurement of positronium hyperfine splitting with sub-THz light
T. Yamazaki, A. Miyazaki, T. Suehara +8
Positronium is an ideal system for the research of the bound state QED. The hyperfine splitting of positronium (Ps-HFS, about 203 GHz) is an important observable but all previous m…
Detection of the Direct Hyperfine Transition of Positronium Atoms using sub-THz High-power Radiation
T. Suehara, A. Miyazaki, T. Yamazaki +11
Hyperfine splitting of positronium is an important parameter for particle physics. This paper gives experimental techniques and results of R&D studies of our experiment to observe…
Data-driven Estimation of SM Backgrounds for SUSY Searches at the LHC
Takayuki Yamazaki
Searches for supersymmetry (SUSY) are very important tasks at the Large Hadron colleder(LHC). If SUSY exists at the TeV scale, clear excess above the Standard Model (SM) background…