Zobrazeno 1 - 10
of 86
pro vyhledávání: '"Morimatsu, Osamu"'
We investigate the survival probability of unstable states, the time-dependence of an initial state, in coupled channels. First, we extend the formulation of the survival probability from single channel to coupled channels (two channels). We derive a
Externí odkaz:
http://arxiv.org/abs/2305.11695
We explore the analytic structure of the three-channel $S$ matrix by generalizing uniformization and making a single-valued map for the three-channel $S$ matrix. First, by means of the inverse Jacobi's elliptic function we construct a transformation
Externí odkaz:
http://arxiv.org/abs/2203.17069
We demonstrate how S-matrix poles manifest themselves as the physical spectrum near the upper threshold in the context of the two-channel uniformized Mittag-Leffler expansion, an expression written as a sum of pole terms under an appropriate variable
Externí odkaz:
http://arxiv.org/abs/2108.11605
Autor:
Yamada, Wren, Morimatsu, Osamu
Publikováno v:
Phys. Rev. C 103, 045201 (2021)
We study the pole properties of $\Lambda(1405)$ in a model-independent manner by applying the Uniformized Mittag-Leffler expansion proposed in our previous paper. The resonant energy, width and residues are determined by expanding the observable as a
Externí odkaz:
http://arxiv.org/abs/2101.10029
Autor:
Yamada, Wren, Morimatsu, Osamu
Publikováno v:
Phys. Rev. C 102, 055201 (2020)
We propose a new, simple model-independent method to extract information of near-threshold resonances, such as complex energies and residues. The method is based on the observation that the Green's function and the T-matrix can be represented as the
Externí odkaz:
http://arxiv.org/abs/2005.07022
Autor:
Morimatsu, Osamu, Yamada, Kazuki
Publikováno v:
Phys. Rev. C 100, 025201 (2019)
We calculate the scattering $T$-matrix of $I=0$ $\bar K N-\pi \Sigma$ coupled channels taking a ladder sum of the Weinberg-Tomozawa interaction without on-shell factorization, regularizing three types of divergent meson-baryon loop functions by dimen
Externí odkaz:
http://arxiv.org/abs/1903.12380
In the three-body system with one resonantly interacting pair, we study the behavior of the $S$-matrix pole near the threshold in the fourth quadrant of the unphysical complex energy plane. Our study is essentially based on the unitarity and analytic
Externí odkaz:
http://arxiv.org/abs/1705.02569
Publikováno v:
Phys. Rev. C 97, 064001 (2018)
Motivated by the existence of candidates for exotic hadrons whose masses are close to both of two-body and three-body hadronic thresholds lying close to each other, we study degenerate two-body and three-body coupled-channel systems. We first formula
Externí odkaz:
http://arxiv.org/abs/1703.04073
We study the dynamic critical exponent from effective and microscopic theories. We employ a simple TDGL model, or model A in the classification of Hohenberg and Halperin, as an effective theory and the imaginary time formalism of the finite-temperatu
Externí odkaz:
http://arxiv.org/abs/1411.1867
We present an argument to support the existence of dissipative modes in relativistic field theories. In an O(N) $\varphi^4$ theory in spatial dimension $d\le 3$, a relaxation constant $\Gamma$ of a two-point function in an infrared region is shown to
Externí odkaz:
http://arxiv.org/abs/1309.4892