Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/139955
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Type: | Journal article |
Title: | Δ Baryon Spectroscopy in Lattice QCD |
Author: | Hockley, L. Kamleh, W. Leinweber, D. Thomas, A. |
Citation: | Few-Body Systems, 2023; 64(3):1-10 |
Publisher: | Springer Nature |
Issue Date: | 2023 |
ISSN: | 0177-7963 1432-5411 |
Statement of Responsibility: | Liam Hockley, Waseem Kamleh, Derek Leinweber, Anthony Thomas |
Abstract: | A variational analysis is performed within the framework of lattice QCD to extract the masses of the spin-3/2 positive parity + baryons, including radial excitations. 2 + 1 flavour dynamical gauge-field configurations provided by the PACS-CS collaboration via the ILDG are considered. To improve our interpolator basis, we perform an iterative process of source and sink smearing and solve a generalised eigenvalue problem using the resulting fermion operators. We obtain a clear signal for the ground and first excited states at a light quark mass corresponding to mπ = 413 MeV. Furthermore, we show that one can use the eigenvectors obtained in this method to investigate the nature of these states, allowing us to classify our results as 1s and 2s states for the ground and first excited states respectively. Finally, we briefly highlight the method of Hamiltonian effective field theory which can be used to make comparison with quark model expectations. |
Keywords: | lattice QCD variational analysis |
Rights: | This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. |
DOI: | 10.1007/s00601-023-01832-x |
Grant ID: | http://purl.org/au-research/grants/arc/190102215 http://purl.org/au-research/grants/arc/210103706 |
Published version: | http://dx.doi.org/10.1007/s00601-023-01832-x |
Appears in Collections: | Physics publications |
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hdl_139955.pdf | Published version | 658.35 kB | Adobe PDF | View/Open |
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