Journal Article

PUBDB-2024-07354

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Lattice QCD study of $πΣ-\bar{K}N$ scattering and the $Λ$(1405) resonance

Bulava, J.DESY* ; Cid-Mora, B. ; Hanlon, A. D. ; Hörz, B. ; Mohler, D. ; Morningstar, C. ; Moscoso, J. ; Nicholson, A. ; Romero-López, F. ; Skinner, S. ; Walker-Loud, A. ; Baryon Scattering Collaboration (Collaboration author)

2024
American Physical Society Ridge, NY

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Please use a persistent id in citations: doi:10.1103/PhysRevD.109.014511  doi:10.3204/PUBDB-2024-07354

Report No.: MIT-CTP/5580; arXiv:2307.13471

Abstract: A lattice QCD computation of the coupled channel $πΣ-\bar{K}N$ scattering amplitudes in the Λ(1405) region is detailed. Results are obtained using a single ensemble of gauge field configurations with N$_f$=2+1 dynamical quark flavors and m$_π$≈200 MeV and m$_K$≈487 MeV. Hermitian correlation matrices using both single baryon and meson-baryon interpolating operators for a variety of different total momenta and irreducible representations are used. Several parametrizations of the two-channel scattering K-matrix are utilized to obtain the scattering amplitudes from the finite-volume spectrum. The amplitudes, continued to the complex energy plane, exhibit a virtual bound state below the $πΣ$ threshold and a resonance pole just below the $\bar{K}N$ threshold.

Keyword(s): resonance: pole ; quark: flavor ; lattice field theory ; Lambda(1405) ; scattering amplitude ; scattering ; baryon ; correlation ; parametrization ; gauge field theory ; meson baryon ; bound state ; coupled channel ; finite size

Note: 18 pages, 11 figures

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Contributing Institute(s):

1. Leitungsbüro Zeuthen (Z_LB)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)
2. DFG project G:(GEPRIS)454605793 - Hadronstreuung und hadronische Resonanzen aus der Gitterquantenchromodynamik (454605793) (454605793)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2024

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Database coverage:
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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Bulava, J.DESY* ; Cid-Mora, B. ; Hanlon, A. D. ; Hörz, B. ; Mohler, D. ; Morningstar, C. ; Moscoso, J. ; Nicholson, A. ; Romero-López, F. ; Skinner, S. ; Walker-Loud, A.
Lattice QCD study of $\pi\Sigma\unicode{x2013}\bar{K}N$ scattering and the $\Lambda(1405)$ resonance
[10.3204/PUBDB-2023-04593]     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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