activity
20202026
most citedA New Method to Extract Information of Near-Threshold Resonances: Uniformized Pole-Sum Representation of Green's Function and T-matrix

15 citations · 49 across the 8 of their papers we have counts for

collaborators

8 papers

hep-lat2026

-meson Nucleon Scattering from Lattice QCD at the Physical Point

Wren Yamada, Yan Lyu, Kotaro Murakami +1

We report the first lattice QCD study of the -wave scattering of the -meson and the nucleon at the physical point, utilizing (2+1)-flavor configurations generated by th…

hep-lat2025

-wave kaon-nucleon interactions from lattice QCD at the physical point

Kotaro Murakami, Sinya Aoki, Takumi Doi +2

We investigate S-wave kaon-nucleon () interactions with strangeness in lattice QCD using the time-dependent HAL QCD method. Employing the -flavor gauge configurat…

hep-lat2025

Pole-Expansion of Two-Hadron Imaginary-Time Correlation Function -a new method of analysis for unstable states in lattice QCD-

Wren Yamada, Osamu Morimatsu, Toru Sato +1

We analyze the pole expansion of the two-hadron imaginary-time correlation function. We first explain the general idea that the imaginary-time correlation function is expressed as…

hep-ph2023

Survival Probability of Unstable States in Coupled-Channels -- nonexponential decay of "threshold-cusp"

Wren A. Yamada, Osamu Morimatsu, Toru Sato +1

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 probabili…

hep-ph2022★ 7 cited

Analytic Map of Three-Channel S Matrix -Generalized Uniformization and Mittag-Leffler Expansion-

Wren A. Yamada, Osamu Morimatsu, Toru Sato

We explore the analytic structure of the three-channel matrix by generalizing uniformization and making a single-valued map for the three-channel matrix. First, by means of…

hep-ph2021★ 14 cited

Near-threshold Spectrum from Uniformized Mittag-Leffler Expansion -Pole Structure of -

Wren A. Yamada, Osamu Morimatsu, Toru Sato +1

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 e…

hep-ph2021★ 13 cited

Application of the Uniformized Mittag-Leffler Expansion to

Wren Yamada, Osamu Morimatsu

We study the pole properties of in a model-independent manner by applying the Uniformized Mittag-Leffler expansion proposed in our previous paper. The resonant energy, wi…

hep-ph2020★ 15 cited

A New Method to Extract Information of Near-Threshold Resonances: Uniformized Pole-Sum Representation of Green's Function and T-matrix

Wren Yamada, Osamu Morimatsu

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…