Pole structure of the Λ(1405) in a recent QCD simulation

Molina, R.; Doring, M.

doi:10.1103/PhysRevD.94.056010

Title: Pole structure of the $Λ (1405)$ in a recent QCD simulation

Journal Article · Tue Sep 27 00:00:00 EDT 2016 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.94.056010· OSTI ID:1328673

Molina, R. ^[1]; Doring, M. ^[2]

The George Washington Univ., Washington, D.C. (United States)
The George Washington Univ., Washington, D.C. (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

The Λ(1405) baryon is difficult to detect in experiment, absent in many quark model calculations, and supposedly manifested through a two-pole structure. Its uncommon properties made it subject to numerous experimental and theoretical studies in recent years. Lattice-QCD eigenvalues for different quark masses were recently reported by the Adelaide group. We compare these eigenvalues to predictions of a model based on Unitary Chiral Perturbation Theory. The UχPT calculation predicts the quark mass dependence remarkably well. It also explains the overlap pattern with different meson-baryon components, mainly πΣ and K¯N, at different quark masses. As a result, more accurate lattice QCD data are required to draw definite conclusions on the nature of the Λ(1405).

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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: 1415459; 1452055; AC05-06OR23177

OSTI ID:: 1328673

Report Number(s):: JLAB-THY-16-2318; DOE/OR/23177-3906; arXiv:1512.05831; PRVDAQ; TRN: US1700162

Journal Information:: Physical Review D, Vol. 94, Issue 5; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 27 works

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Structure of the Roper Resonance from Lattice QCD Constraints Wu, Jia-jun; Leinweber, Derek B.; Liu, Zhan-wei arXiv https://doi.org/10.48550/arxiv.1703.10715	text	January 2017
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