Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/102852
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Type: | Journal article |
Title: | Flavor-singlet baryons in the graded symmetry approach to partially quenched QCD |
Author: | Hall, J. Leinweber, D. |
Citation: | Physical Review D: Particles, Fields, Gravitation and Cosmology, 2016; 94(9):094004-1-094004-10 |
Publisher: | American Physical Society |
Issue Date: | 2016 |
ISSN: | 1550-7998 1550-2368 |
Statement of Responsibility: | Jonathan M. M. Hall and Derek B. Leinweber |
Abstract: | Progress in the calculation of the electromagnetic properties of baryon excitations in lattice QCD presents new challenges in the determination of sea-quark loop contributions to matrix elements. A reliable estimation of the sea-quark loop contributions represents a pressing issue in the accurate comparison of lattice QCD results with experiment. In this article, an extension of the graded symmetry approach to partially quenched QCD is presented, which builds on previous theory by explicitly including flavor-singlet baryons in its construction. The formalism takes into account the interactions among both octet and singlet baryons, octet mesons, and their ghost counterparts; the latter enables the isolation of the quark-flow disconnected sea-quark loop contributions. The introduction of flavor-singlet states enables systematic studies of the internal structure of Λ-baryon excitations in lattice QCD, including the topical Λ(1405). |
Description: | Published 4 November 2016 |
Rights: | © 2016 American Physical Society. |
DOI: | 10.1103/PhysRevD.94.094004 |
Grant ID: | http://purl.org/au-research/grants/arc/DP120104627 http://purl.org/au-research/grants/arc/DP140103067 http://purl.org/au-research/grants/arc/DP150103164 |
Published version: | http://dx.doi.org/10.1103/physrevd.94.094004 |
Appears in Collections: | Aurora harvest 7 IPAS publications |
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hdl_102852.pdf | Published version | 434.75 kB | Adobe PDF | View/Open |
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