Lattice QCD study of scattering and the resonance

J Bulava, B Cid-Mora, AD Hanlon, B Hörz, D Mohler… - Physical Review D, 2024 - APS
A lattice QCD computation of the coupled channel π Σ–K¯ N scattering amplitudes in the Λ
(1405) region is detailed. Results are obtained using a single ensemble of gauge field …

Two-Pole Nature of the Resonance from Lattice QCD

J Bulava, B Cid-Mora, AD Hanlon, B Hörz, D Mohler… - Physical Review Letters, 2024 - APS
This Letter presents the first lattice QCD computation of the coupled channel π Σ-K¯ N
scattering amplitudes at energies near 1405 MeV. These amplitudes contain the resonance …

Hyperon II: Properties of excited hyperons

AV Sarantsev, M Matveev, VA Nikonov… - The European Physical …, 2019 - Springer
We report properties of Λ Λ and Σ Σ hyperon resonances formed in K^- K-induced reactions.
Special emphasis is laid on the analysis of the three-body final states 2π^0Λ 2 π 0 Λ and …

Application of the uniformized Mittag-Leffler expansion to

WA Yamada, O Morimatsu - Physical Review C, 2021 - APS
We study the pole properties of Λ (1405) in a model-independent manner by applying the
uniformized Mittag-Leffler expansion proposed in our previous paper. The resonant energy …

The in resummed chiral effective field theory

XL Ren, E Epelbaum, J Gegelia… - The European Physical …, 2021 - Springer
We study the unitarized meson–baryon scattering amplitude at leading order in the
strangeness S=-1 S=-1 sector using time-ordered perturbation theory for a manifestly …

Renormalization of the unitarized Weinberg-Tomozawa interaction without on-shell factorization and coupled channels

O Morimatsu, K Yamada - Physical Review C, 2019 - APS
We calculate the scattering T-matrix of I= 0 K¯ N-π Σ coupled channels taking a ladder sum
of the Weinberg-Tomozawa interaction without on-shell factorization, regularizing three …

The resonance as a genuine three-quark or molecular state

B Golli, H Osmanović, S Širca - The European Physical Journal A, 2022 - Springer
The mechanism for the formation of the Λ (1405) resonance is studied in a chiral quark
model that includes quark-meson as well as contact (four point) interactions. The negative …

Unitary bethe-salpeter methods in two-and three-body systems

D Sadasivan - 2020 - osti.gov
The study of resonances, unstable particles formed in particle scattering, is motivated by the
questions about the strong interaction and the composition of hadrons. In order to advance …

Analysis of Λ (1405) production data in the π− p→ K0πΣ reaction at pπ= 1.69 GeV/c

M Hassanvand, Y Akaishi, T Yamazaki - Proceedings of the Japan …, 2019 - jstage.jst.go.jp
We have been studying the (Σπ) 0 mass distribution based on data from an old Hydrogen
Bubble Chamber collected by Thomas et al. concerning the p (π−, K 0) Σπ reaction at p π …

Unitary Bethe-Salpeter Methods in Two-andThree-Body Systems

D Sadasivan - 2020 - search.proquest.com
The study of resonances, unstable particles formed in particle scattering, is motivated by the
questions about the strong interaction and the composition of hadrons. In order to advance …