Zobrazeno 1 - 10
of 303
pro vyhledávání: '"Katō, Kiyoshi"'
Publikováno v:
Progress of Theoretical and Experimental Physics, Volume 2024, Issue 8, August 2024, 083B08
Four 3-loop two-point functions are studied analytically and numerically using a simplified sector decomposition method. The coefficients of the ultraviolet divergent part are determined analytically, and those of the finite part are computed numeric
Externí odkaz:
http://arxiv.org/abs/2405.13286
A note on the dimensional regularization and the on-mass-shell renormalization in the two-loop order
Autor:
Kato, Kiyoshi
Publikováno v:
Kogakuin Daigaku Kenkyuronso(ISSN 21866635), vol.60-2, pp.1-8, 2023
The use of the dimensional regularization in the on-mass-shell renormalization scheme sometimes fails to locally cancel the ultraviolet divergence for a class of diagrams in the two-loop order. The mechanism is discussed based on an example with expl
Externí odkaz:
http://arxiv.org/abs/2403.11112
Autor:
Myo, Takayuki, Kato, Kiyoshi
Publikováno v:
Physical Review C 109, 014324 (2024)
We propose a new basis state, which satisfies the Pauli principle in the nuclear cluster model. The basis state is defined as the generalized coherent state of the harmonic oscillator wave function using a pair of the creation operators and is orthog
Externí odkaz:
http://arxiv.org/abs/2401.14572
Autor:
Myo, Takayuki, Kato, Kiyoshi
Publikováno v:
Physical Review C 107, 034305 (2023)
We investigate the soft dipole resonance in the proton-rich nucleus $^8_6$C$_2$, which is a collective dipole oscillation of four valence protons against the $\alpha$ core,and discuss the isospin symmetry with the mirror nucleus $^8_2$He$_6$. We use
Externí odkaz:
http://arxiv.org/abs/2303.14318
Autor:
Myo, Takayuki, Kato, Kiyoshi
Publikováno v:
Physical Review C 107, 014301 (2023)
We propose a possible scheme to interpret the complex expectation values associated with resonances having the complex eigenenergies. Using the Green's function for resonances, the expectation value is basically described by the Breit-Wigner distribu
Externí odkaz:
http://arxiv.org/abs/2301.05355
Publikováno v:
Progress of Theoretical and Experimental Physics 2022 (2022) 103D01
In neutron-rich $^8$He, we study the soft dipole resonance, which is regarded as a dipole oscillation of four valence neutrons against the $^4$He core, and its effect on the low-energy electric dipole strength with a $^4$He+$n$+$n$+$n$+$n$ five-body
Externí odkaz:
http://arxiv.org/abs/2211.10930
Autor:
Myo, Takayuki, Kato, Kiyoshi
Publikováno v:
Physical Review C 106, L021302 (2022)
We investigate the multineutron excitations of neutron-rich $^8$He in the electric dipole strength using a $^4$He+$n$+$n$+$n$+$n$ five-body model. Many-body unbound states of $^8$He are obtained in the complex scaling method. We found that the differ
Externí odkaz:
http://arxiv.org/abs/2208.01801
Publikováno v:
Physical Review C 104, 044306 (2021)
We study many-body resonances in the neuron-rich $^8$He and the mirror proton-rich $^8$C using the $^4$He+$N$+$N$+$N$+$N$ five-body model with the isospin $T=2$ system. Resonances are described with the complex energy eigenvalues as the Gamow states
Externí odkaz:
http://arxiv.org/abs/2110.11041
Publikováno v:
In Optical Materials: X May 2024 22
Autor:
Myo, Takayuki, Kato, Kiyoshi
Publikováno v:
Prog. Theor. Exp. Phys. 2020, 12A101
The complex scaling method (CSM) is one of the most powerful methods of describing the resonances with complex energy eigenstates, based on non-Hermitian quantum mechanics. We present the basic application of CSM to the properties of the unbound phen
Externí odkaz:
http://arxiv.org/abs/2007.12172