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https://hdl.handle.net/2440/106230
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Type: | Journal article |
Title: | Structure of the Λ (1405) from Hamiltonian effective field theory |
Other Titles: | Structure of the Lambda (1405) from Hamiltonian effective field theory |
Author: | Liu, Z.-W. Hall, J. Leinweber, D. Thomas, A. Wu, J.-J. |
Citation: | Physical Review D, 2017; 95(1):014506-1-014506-10 |
Publisher: | AMER PHYSICAL SOC |
Issue Date: | 2017 |
ISSN: | 2470-0010 2470-0029 |
Statement of Responsibility: | Zhan-Wei Liu, Jonathan M. M. Hall, Derek B. Leinweber, Anthony W. Thomas and Jia-Jun Wu |
Abstract: | The pole structure of the Λ(1405) is examined by fitting the couplings of an underlying Hamiltonian effective field theory to cross sections of K−p scattering in the infinite-volume limit. Finite-volume spectra are then obtained from the theory, and compared to lattice QCD results for the mass of the Λ(1405). Momentum-dependent, nonseparable potentials motivated by the well-known Weinberg-Tomozawa terms are used, with SU(3) flavor symmetry broken in the couplings and masses. In addition, we examine the effect on the behavior of the spectra from the inclusion of a bare triquarklike isospin-zero basis state. It is found that the cross sections are consistent with the experimental data with two complex poles for the Λ(1405), regardless of whether a bare-baryon basis state is introduced or not. However, it is apparent that the bare baryon is important for describing the results of lattice QCD at high pion masses. |
Rights: | © 2017 American Physical Society |
DOI: | 10.1103/PhysRevD.95.014506 |
Grant ID: | http://purl.org/au-research/grants/arc/CE1101004 http://purl.org/au-research/grants/arc/LE160100051 http://purl.org/au-research/grants/arc/DP150103101 http://purl.org/au-research/grants/arc/DP150103164 http://purl.org/au-research/grants/arc/DP120104627 |
Published version: | http://dx.doi.org/10.1103/physrevd.95.014506 |
Appears in Collections: | Aurora harvest 8 Physics publications |
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