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

Abstract

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).

Authors:
 [1];  [2]
  1. The George Washington Univ., Washington, D.C. (United States)
  2. The George Washington Univ., Washington, D.C. (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1328673
Report Number(s):
JLAB-THY-16-2318; DOE/OR/23177-3906; arXiv:1512.05831
Journal ID: ISSN 2470-0010; PRVDAQ; TRN: US1700162
Grant/Contract Number:
1415459; 1452055; AC05-06OR23177
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 94; Journal Issue: 5; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Molina, R., and Doring, M. Pole structure of the Λ(1405) in a recent QCD simulation. United States: N. p., 2016. Web. doi:10.1103/PhysRevD.94.056010.
Molina, R., & Doring, M. Pole structure of the Λ(1405) in a recent QCD simulation. United States. doi:10.1103/PhysRevD.94.056010.
Molina, R., and Doring, M. Tue . "Pole structure of the Λ(1405) in a recent QCD simulation". United States. doi:10.1103/PhysRevD.94.056010. https://www.osti.gov/servlets/purl/1328673.
@article{osti_1328673,
title = {Pole structure of the Λ(1405) in a recent QCD simulation},
author = {Molina, R. and Doring, M.},
abstractNote = {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).},
doi = {10.1103/PhysRevD.94.056010},
journal = {Physical Review D},
number = 5,
volume = 94,
place = {United States},
year = {Tue Sep 27 00:00:00 EDT 2016},
month = {Tue Sep 27 00:00:00 EDT 2016}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 6works
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