36 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Yamaguchi UniversityJP29 papers
- National Institute of TechnologyJP4 papers
- RIKEN Nishina CenterJP4 papers
- Kyushu UniversityJP3 papers
- National Institute of Technology, Kagoshima CollegeJP3 papers
- The University of OsakaJP3 papers
- Ibaraki UniversityJP2 papers
- Institute of Space and Astronautical ScienceJP2 papers
- Japan Aerospace Exploration AgencyJP2 papers
- National Astronomical Observatory of JapanJP2 papers
- National Institute of Information and Communications TechnologyJP2 papers
- Osaka Metropolitan UniversityJP2 papers
43 papers
Precision spectral measurements of Chromium and Titanium from 10 to 250 GeV and sub-Iron to Iron ratio with the Calorimetric Electron Telescope on the ISS
O. Adriani, Y. Akaike, K. Asano +77
The Calorimetric Electron Telescope (CALET), in operation on the International Space Station since 2015, collected a large sample of cosmic-ray (CR) iron and sub-iron events over a…
Nonspherical Pauli-forbidden states in deformed halo nuclei: Impact on the resonant states in the particle rotor model
Shin Watanabe, Antonio M. Moro
Background: An important aspect of reducing nuclear many-body problems to few-body models is the presence of Pauli forbidden (PF) states, which are excluded in fully antisymmetrize…
Investigation of the determination of nuclear deformation using high-energy heavy-ion scattering
Shin Watanabe, Takenori Furumoto, Wataru Horiuchi +2
Background: Nuclear deformation provides a crucial characteristic of nuclear structure. Conventionally, the quadrupole deformation length of a nucleus, , has often been dete…
Uncovering the sign of nuclear deformations: Determination of prolate or oblate shape via low-energy inelastic scattering
Shin Watanabe, Yoshiki Suzuki, Masaaki Kimura +1
Background: Understanding nuclear shape is a crucial problem in nuclear physics. In particular, determining the sign of quadrupole deformation, i.e., whether prolate or oblate, rem…
Electric and dilatonic fields of a charged massive particle at rest in the field of a charged dilaton black hole
Nahomi Kan, Kiyoshi Shiraishi
We study linear-perturbation equations for the two-body system of a charged dilaton black hole, of which dilaton coupling constant is , and a static particle with mass , elec…
Dynamical mass generation of spin-2 fields in de Sitter space for an symmetric model at large
Nahomi Kan, Kiyoshi Shiraishi
We consider the strong-coupling phase in a model of spin-2 field theory in de Sitter spacetime and the effective mass of spin-2 fields therein. In the strong-coupling phase,…
Discrete time heat kernel and UV modified propagators with Dimensional Deconstruction
Nahomi Kan, Kiyoshi Shiraishi
We revisit the dimensionally deconstructed scalar quantum electrodynamics and consider the (Euclidean) propagator of the scalar field in the model. Although we have previously inve…
Spinorial Wheeler-DeWitt wave functions inside black hole horizons
Nahomi Kan, Takuma Aoyama, Kiyoshi Shiraishi
We revisit the solutions of the Wheeler-DeWitt (WDW) equation inside the horizons of spherical black holes and planar topological black holes in arbitrary dimensions. For these sys…
Classical and quantum bicosmology with noncommutativity
Nahomi Kan, Takuma Aoyama, Kiyoshi Shiraishi
Recently, Falomir, Gamboa, Mendez, Gondolo and Maldonado proposed a bicosmology scenario [1-4] for solving some cosmological problems related to inflation, dark matter, and thermal…
Geometrical effective actions for a partially massless spin-2 field
Nahomi Kan, Takuma Aoyama, Kiyoshi Shiraishi
We consider nonlinear effective actions for a spin-2 field, whose `decoupling' limit gives Fierz-Pauli action in D dimensional maximally symmetric spacetime. We find, especially, t…
The Gluon Exchange Model in proton-nucleus collisions
Marek Jeżabek, Andrzej Rybicki
We apply our recently formulated Gluon Exchange Model (GEM) to baryon production in proton-nucleus reactions involving N>1 proton-nucleon collisions. We propose a description schem…
Third quantization for scalar and spinor wave functions of the Universe in an extended minisuperspace
Nahomi Kan, Takuma Aoyama, Taiga Hasegawa +1
We consider the third quantization in quantum cosmology of a minisuperspace extended by the Eisenhart-Duval lift. We study the third quantization based on both Klein-Gordon type an…
Eisenhart--Duval lift for minisuperspace quantum cosmology
Nahomi Kan, Takuma Aoyama, Taiga Hasegawa +1
We study covariant equations in quantum cosmology of an extended minisuperspace obtained by the Eisenhart--Duval lift. We find that a Dirac-type equation is naturally introduced in…
Quantum baryon number fluctuations in subsystems of a hot and dense relativistic gas of fermions
Arpan Das, Wojciech Florkowski, Radoslaw Ryblewski +1
Quantum features of the baryon number fluctuations in subsystems of a hot and dense relativistic gas of fermions are analyzed. We find that the fluctuations in small systems are si…
Hosotani mechanism in the "color"-singlet plasma
Nahomi Kan, Koichiro Kobayashi, Kiyoshi Shiraishi
By projecting the partition function on the "color"-singlet state, we investigate the Hosotani mechanism in the fermion-gauge boson plasma. The present toy-model analysis of the on…
Isothermal spheres in general relativity and Horava-type gravity
Nahomi Kan, Kiyoshi Shiraishi
We construct a toy model for isothermal spheres in Horava gravity, which includes Einstein's gravity if a parameter is appropriately chosen. The equations for the isothermal sphere…
Calculations in induced gravity from higher-derivative field theories
Nahomi Kan, Kiyoshi Shiraishi
In this paper, we investigate Einstein's gravity induced from higher-derivative scalar field theories. We develop an approach utilizing an effective theory of multiple fields for t…
Practical method for decomposing discretized breakup cross sections into components of each channel
Shin Watanabe, Kazuyuki Ogata, Takuma Matsumoto
Background: In the continuum-discretized coupled-channel method, a breakup cross section (BUX) is obtained as an admixture of several components of different channels in multi-chan…
Quantum fluctuation of stress tensor in a higher-derivative scalar field theory around a cosmic string
Nahomi Kan, Masashi Kuniyasu, Kiyoshi Shiraishi
We calculate the vacuum fluctuation of the stress tensor of a higher-derivative theory around a thin cosmic string. To this end, we adopt the method to obtain the stress tensor fro…
Discrete heat kernel, UV modified Green's function, and higher derivative theories
Nahomi Kan, Masashi Kuniyasu, Kiyoshi Shiraishi +1
We perform the UV deformation of the Green's function in free scalar field theory using a discrete heat kernel method. It is found that the simplest UV deformation based on the dis…
Vacuum expectation values in non-trivial background space from three types of UV improved Green's functions
Nahomi Kan, Masashi Kuniyasu, Kiyoshi Shiraishi +1
We evaluate the quantum expectation values in non-simply connected spaces by using UV improved Green's functions proposed by Padmanabhan, Abel, and Siegel. It is found that the res…
Equivalent Hamiltonian approach to quantum cosmology of integrable models
Nahomi Kan, Masashi Kuniyasu, Kiyoshi Shiraishi +1
We propose an approach to quantum cosmology of integrable models. To analyze the models with two dynamical variables, we introduce equivalent Hamiltonians in reduced phase spaces,…
Lattice deformation on flat-band modulation in 3D Hopf-linked carbon allotrope: Hopfene
Isao Tomita, Shinichi Saito
Flat bands form in a 3D Hopf-linked graphene crystal or a 3D carbon allotrope named Hopfene, which qualitatively differ from bands of only graphenes. This paper discusses carbon-he…
Topological carbon allotropes: paradigm shift for materials innovation
Shinichi Saito, Isao Tomita
Topology is a central concept of mathematics, which allows us to distinguish two isolated rings with linked ones. In material science, researchers discovered topologically differen…