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53 papers · 1 filter
New air fluorescence detectors employed in the Telescope Array experiment
H. Tokuno, Y. Tameda, M. Takeda +134
Since 2007, the Telescope Array (TA) experiment, based in Utah, USA, has been observing ultra high energy cosmic rays to understand their origins. The experiment involves a surface…
Resonant annihilation of long-lived massive colored particles through hadronic collisions
Motohiko Kusakabe, Tomohiro Takesako
Hypothetical long-lived massive colored particles (MCPs or Ys) would be confined in colorless exotic strongly interacting massive particles (SIMPs) at color confinement temperature…
Prospects for Detecting Gamma-Ray Bursts at Very High Energies with the Cherenkov Telescope Array
Jun Kakuwa, Kohta Murase, Kenji Toma +3
We discuss the prospects for the detection of gamma-ray bursts (GRBs) by the Cherenkov Telescope Array (CTA), the next generation, ground-based facility of imaging atmospheric Cher…
Hubble Induced Mass in Radiation Dominated Universe
Masahiro Kawasaki, Tomohiro Takesako
We reconsider the effective mass of a scalar field which interact with visible sector via Planck-suppressed coupling in supergravity framework. We focus on the radiation-dominated…
The First Systematic Survey for Lyman Alpha Emitters at z=7.3 with Red-sensitive Subaru/Suprime-Cam
Takatoshi Shibuya, Nobunari Kashikawa, Kazuaki Ota +5
We have performed deep imaging surveys for LyA emitters (LAEs) at redshift ~7.3 in two blank fields, the Subaru Deep Field (SDF) and the Subaru/XMM-Newton Deep survey Field (SXDF),…
Revisiting the cosmological coherent oscillation
Masahiro Kawasaki, Naoya Kitajima, Kazunori Nakayama
It is often the case that scalar fields are produced in the early Universe in the form of coherent oscillation. These scalar fields may have huge abundances and affect the evolutio…