Searching for the first radial excitation of the Δ(1232) in lattice QCD

Simple item page
dc.contributor.authorHockley, L.
dc.contributor.authorKamleh, W.
dc.contributor.authorLeinweber, D.B.
dc.contributor.authorThomas, A.W.
dc.date.issued2024
dc.description.abstractWe present a lattice QCD analysis of the Δ-baryon spectrum, with the goal of finding the position of the 2s radial excitation of the Δ(1232) ground state. Using smeared three-quark operators in a correlation matrix analysis, we report masses for the ground, first and second excited states of the J(P) = 3/2⁺ spectrum across a broad range of m²(∏). We identify the lowest lying state as being a 1s state, consistent with the well known Δ(1232). The first excitation is identified as a 2s state, but is found to have a mass of approximately 2.15 GeV on our ∼3 fm lattice, which does not appear to be associated with the Δ(1600) resonance in a significant manner. We also report on the spin-1/2 and odd-parity states accessible via our methods. The large excitation energies of the radial excitations provide a potential resolution to the long-standing missing baryon resonances problem.
dc.description.statementofresponsibilityLiam Hockley, Waseem Kamleh, Derek Leinweber and Anthony Thomas
dc.identifier.citationJournal of Physics G: Nuclear and Particle Physics, 2024; 51(6):065106-1-065106-24
dc.identifier.doi10.1088/1361-6471/ad33e2
dc.identifier.issn0954-3899
dc.identifier.issn1361-6471
dc.identifier.orcidHockley, L. [0000-0002-7021-056X]
dc.identifier.orcidKamleh, W. [0000-0002-6177-5366]
dc.identifier.orcidLeinweber, D.B. [0000-0002-4745-6027]
dc.identifier.orcidThomas, A.W. [0000-0003-0026-499X]
dc.identifier.urihttps://hdl.handle.net/2440/142788
dc.language.isoen
dc.publisherIOP Publishing
dc.relation.granthttp://purl.org/au-research/grants/arc/DP190102215
dc.relation.granthttp://purl.org/au-research/grants/arc/DP210103706
dc.relation.granthttp://purl.org/au-research/grants/arc/DP230101791
dc.rights© 2024 The Author(s). Published by IOP Publishing Ltd. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
dc.source.urihttp://dx.doi.org/10.1088/1361-6471/ad33e2
dc.subjectlattice QCD; hadron physics; nuclear theory; lattice spectroscopy
dc.titleSearching for the first radial excitation of the Δ(1232) in lattice QCD
dc.title.alternativeSearching for the first radial excitation of the Delta(1232) in lattice QCD
dc.typeJournal article
pubs.publication-statusPublished

Files

Collections

Research Outputs