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https://hdl.handle.net/2440/107770
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dc.contributor.author | Thomas, S. | - |
dc.contributor.author | Kamleh, W. | - |
dc.contributor.author | Leinweber, D. | - |
dc.date.issued | 2015 | - |
dc.identifier.citation | Physical Review D: Particles, Fields, Gravitation and Cosmology, 2015; 92(9):094515-1-094515-12 | - |
dc.identifier.issn | 1550-7998 | - |
dc.identifier.issn | 1550-2368 | - |
dc.identifier.uri | http://hdl.handle.net/2440/107770 | - |
dc.description | Published 24 November 2015 | - |
dc.description.abstract | The role of instanton-like objects in the QCD vacuum on the mass spectrum of low-lying light hadrons is explored in lattice QCD. Using overimproved stout-link smearing, tuned to preserve instanton-like objects in the QCD vacuum, the evolution of the mass spectrum under smearing is examined. The calculation is performed using a 20³×40 dynamical fat-link-irrelevant-clover (FLIC) fermion action ensemble with lattice spacing 0.126 fm. Through the consideration of a range of pion masses, the effect of the vacuum instanton content is compared at a common pion mass. While the qualitative features of ground-state hadrons are preserved on instanton-dominated configurations, the excitation spectrum experiences significant changes. The underlying physics revealed shows little similarity to the direct-instanton-interaction predictions of the instanton liquid model. | - |
dc.description.statementofresponsibility | Samuel D. Thomas, Waseem Kamleh, and Derek B. Leinweber | - |
dc.language.iso | en | - |
dc.publisher | American Physical Society | - |
dc.rights | © 2015 American Physical Society | - |
dc.source.uri | http://dx.doi.org/10.1103/physrevd.92.094515 | - |
dc.title | Instanton contributions to the low-lying hadron mass spectrum | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1103/PhysRevD.92.094515 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/DP120104627 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/DP150103164 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Kamleh, W. [0000-0002-6177-5366] | - |
dc.identifier.orcid | Leinweber, D. [0000-0002-4745-6027] | - |
Appears in Collections: | Aurora harvest 8 Special Research Centre for the Subatomic Structure of Matter publications |
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