The Λ(1405) pole structure from Lattice QCD: a coupled-channel πΣ - (K)over-barN study

被引：0

作者：

Bulava, John ^{[1
]}

Cid-Mora, Barbara ^{[2
,3
]}

Hanlon, Andrew D. ^{[4
]}

Hoerz, Ben ^{[5
]}

Mohler, Daniel ^{[2
,3
]}

Morningstar, Colin ^{[6
]}

Moscoso, Joseph ^{[7
]}

Nicholson, Amy ^{[7
]}

Romero-Lopez, Fernando ^{[8
]}

Skinner, Sarah ^{[7
]}

Walker-Loud, Andre ^{[9
]}

机构：

[1] Ruhr Univ Bochum, Inst Theoret Phys 2, Fak Phys & Astron, D-44780 Bochum, Germany

[2] GSI Helmholtz Ctr Heavy Ion Res, Darmstadt, Germany

[3] Tech Univ Darmstadt, Inst Kernphys, Schlossgartenstr 2, D-64289 Darmstadt, Germany

[4] Brookhaven Natl Lab, Phys Dept, Upton, NY 11973 USA

[5] Intel Deutschland GmbH, Dornacher Str 1, D-85622 Feldkirchen, Germany

[6] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA

[7] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27516 USA

[8] MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA

[9] Lawrence Berkeley Natl Lab, Nucl Sci Div, Berkeley, CA 94720 USA

来源：

16TH INTERNATIONAL CONFERENCE ON MESON-NUCLEON PHYSICS AND THE STRUCTURE OF THE NUCLEON, MENU 2023 | 2024年 / 303卷

基金：

美国国家科学基金会;

关键词：

CHIRAL DYNAMICS; BOUND-STATES; RESONANCES; SCATTERING;

D O I：

10.1051/epjconf/202430301004

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

This report summarizes results of the first lattice QCD calculation of coupled-channel pi Sigma - (K) over barN scattering in the Lambda(1405) region. This study was carried out using a single CLS ensemble with a heavier-than-physical pion mass m(pi) approximate to 200 MeV and a lighter-than-physical kaon mass m(K) approximate to 487 MeV. Once the finite-volume energy spectrum has been reliably extracted, the Luscher method was employed to obtain scattering amplitudes. Through a variety of parametrizations of the two-channel K-matrix, the final results show a virtual bound state below the pi Sigma threshold and a resonance right below (K) over barN.

引用

页数：7

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