The Λ(1405) pole structure from Lattice QCD: A coupled-channel πΣ − KN study
This report summarizes results of the first lattice QCD calculation of coupled-channel πΣ − K ¯ N scattering in the Λ(1405) region. This study was carried out using a single CLS ensemble with a heavier-than-physical pion mass m π ≈ 200 MeV and a lighter-than-physical kaon mass m K ≈ 487 MeV. Once the finite-volume energy spectrum has been reliably extracted, the Lüscher 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 πΣ threshold and a resonance right below K ¯ N .
Authors
- Fernando Romero-López (ORCID: https://orcid.org/0000-0003-0239-1394)
- Bárbara Cid-Mora (ORCID: https://orcid.org/0000-0002-4511-4963)
- Andrew D. Hanlon (ORCID: https://orcid.org/0000-0001-8786-8053)
- Colin Morningstar (ORCID: https://orcid.org/0000-0002-0607-9923)
- John Bulava (ORCID: https://orcid.org/0000-0001-9447-8459)
- Amy Nicholson (ORCID: https://orcid.org/0000-0001-7002-0945)
- Joseph Moscoso (ORCID: https://orcid.org/0000-0002-7227-9165)
- André Walker-Loud (ORCID: https://orcid.org/0000-0002-4686-3667)
- Sarah Skinner (ORCID: https://orcid.org/0000-0003-1089-723X)
- Ben Hörz (ORCID: https://orcid.org/0000-0003-4062-7898)
- Daniel Mohler (ORCID: https://orcid.org/0000-0003-1852-9562)
Institutions
- University of North Carolina at Chapel Hill (US)
Publication Details
- Journal
- UNC Libraries
- Published
- 2024-10-03
- DOI
- https://doi.org/10.17615/6t6e-gb33
- Primary Topic
- Quantum Chromodynamics and Particle Interactions
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Science Foundation
- U.S. Department of Energy
- National Energy Research Scientific Computing Center
- Deutsche Forschungsgemeinschaft
- Office of Science
- Nuclear Physics
- Lawrence Berkeley National Laboratory