Pseudoscalar flavor-singlets and staggered fermions

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dc.creatorGregory, Eric B.
dc.creatorIrving, Alan C.
dc.creatorMcNeile, Craig
dc.creatorRichards, Christopher M.
dc.date2006-10-06
dc.date.accessioned2026-07-07T11:58:24Z
dc.date.available2026-07-07T11:58:24Z
dc.descriptionThe Asqtad improved staggered fermion formalism has been a valuable tool in successfully calculating the non-singlet parts of the hadronic spectrum. We are engaged in a project to calculate the spectrum of the pseudoscalar singlet mesons with 2+1-flavor Asqtad staggered gauge configurations. Propagators of flavor-singlet states incorporate contributions from both disconnected and connected diagrams, and hence are sensitive to any differences in the actions governing the sea and valence fermions on the lattice. As such, they also present the possibility of a probe of the validity of the ``fourth-root trick'' in the staggered fermion formulation. We present an update on our progress toward measuring the $η'$ mass on 2+1-flavor Asqtad staggered gauge configurations, including a review of methods and preliminary results. We also show a strong correlation between ${\rm Tr}(γ_5\otimes 1)$ and the topological charge in these configurations, as predicted by the index theorem.
dc.description7 pages, 5 figures, talk presented at Lattice2006 (Hadron Spectroscopy)
dc.identifierhttps://arxiv.org/abs/hep-lat/0610044
dc.identifierhttp://arxiv.org/abs/hep-lat/0610044
dc.identifierPoSLAT2006:176,2006
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/206213
dc.subjectHigh Energy Physics - Lattice
dc.titlePseudoscalar flavor-singlets and staggered fermions
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