Current studentsExisting staffContact us
 

Low-lying odd-parity nucleon resonances as quark-model-like states

Simple item page
dc.contributor.authorAbell, C.D.
dc.contributor.authorLeinweber, D.B.
dc.contributor.authorLiu, Z.-W.
dc.contributor.authorThomas, A.W.
dc.contributor.authorWu, J.-J.
dc.date.issued2023
dc.descriptionPublished 30 November 2023)\
dc.description.abstractRecent lattice QCD results for the low-lying odd-parity excitations of the nucleon near the 𝑁*⁡(1535) and 𝑁*⁡(1650) resonance positions have revealed that the lattice QCD states have magnetic moments consistent with predictions from a constituent quark model. Using Hamiltonian effective field theory (HEFT) to describe pion-nucleon scattering in the I(JP) = ½ ⁢(½⁻) channel, we represent these two quark-model-like states as two single-particle bare basis states, dressed and mixed by meson-baryon scattering channels. By constraining the free parameters of the Hamiltonian with 𝑆₁₁ pion-nucleon scattering data, we perform the first calculation of the finite-volume spectrum using two bare-baryon basis states. By comparing this spectrum to contemporary lattice QCD results at three lattice volumes, we analyze the eigenvectors of the Hamiltonian to gain insight into the structure and composition of these two low-lying resonances. We find that an interpretation of the two low-lying nucleon resonances as quark-model-like states dressed by meson-baryon interactions is consistent with both the 𝑆11 scattering data and lattice QCD. We introduce a novel HEFT formalism for estimating scattering-state contaminations in lattice QCD correlation functions constructed with standard three-quark operators. Not only are historical lattice QCD results described with excellent accuracy, but correlation functions with large scattering-state contaminations are identified.
dc.description.statementofresponsibilityCurtis D. Abell, Derek B. Leinweber, Zhan-Wei Liu, Anthony W. Thomas, and Jia-Jun Wu
dc.identifier.citationPhysical Review D, 2023; 108(9):094519-1-094519-18
dc.identifier.doi10.1103/physrevd.108.094519
dc.identifier.issn2470-0010
dc.identifier.issn2470-0029
dc.identifier.orcidAbell, C.D. [0000-0002-3555-026X]
dc.identifier.orcidLeinweber, D.B. [0000-0002-4745-6027]
dc.identifier.orcidThomas, A.W. [0000-0003-0026-499X]
dc.identifier.urihttps://hdl.handle.net/2440/142146
dc.language.isoen
dc.publisherAmerican Physical Society
dc.relation.granthttp://purl.org/au-research/grants/arc/LE190100021
dc.relation.granthttp://purl.org/au-research/grants/arc/DP190102215
dc.relation.granthttp://purl.org/au-research/grants/arc/DP210103706
dc.rightsPublished by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
dc.source.urihttp://dx.doi.org/10.1103/physrevd.108.094519
dc.titleLow-lying odd-parity nucleon resonances as quark-model-like states
dc.typeJournal article
pubs.publication-statusPublished

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
hdl_142146.pdf
Size:
1.53 MB
Format:
Adobe Portable Document Format
Description:
Published version
Download

Collections

Research Outputs