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- The University of TokyoJP64 papers
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12 papers · 1 filter
Quark number density at imaginary chemical potential and its extrapolation to large real chemical potential by the effective model
Junichi Takahashi, Junpei Sugano, Masahiro Ishii +2
We evaluate quark number densities at imaginary chemical potential by lattice QCD with clover-improved two-flavor Wilson fermion. The quark number densities are extrapolated to the…
Quark number densities at imaginary chemical potential in lattice QCD with Wilson fermions and its model analyses
Junichi Takahashi, Hiroaki Kouno, Masanobu Yahiro
We investigate temperature () dependence of quark number densities () at imaginary and real chemical potential () by using lattice QCD and the hadron resonance…
Photon-Veto Counters at the Outer Edge of the Endcap Calorimeter for the KOTO Experiment
T. Matsumura, T. Shinkawa, H. Yokota +17
The Outer-Edge Veto (OEV) counter subsystem for extra-photon detection from the backgrounds for the? decay is located at the outer edge of the endcap Cs…
Thermal Effects and Sudden Decay Approximation in the Curvaton Scenario
Naoya Kitajima, David Langlois, Tomo Takahashi +2
We study the impact of a temperature-dependent curvaton decay rate on the primordial curvature perturbation generated in the curvaton scenario. Using the familiar sudden decay appr…
Blue-tilted Tensor Spectrum and Thermal History of the Universe
Sachiko Kuroyanagi, Tomo Takahashi, Shuichiro Yokoyama
We investigate constraints on the spectral index of primordial gravitational waves (GWs), paying particular attention to a blue-tilted spectrum. Such constraints can be used to tes…
CMB distortion from primordial gravitational waves
Atsuhisa Ota, Tomo Takahashi, Hiroyuki Tashiro +1
We propose a new mechanism of generating the distortion in cosmic microwave background (CMB) originated from primordial gravitational waves. Such distortion is generated by…