Study of the [eta] and [eta]' mesons with improved staggered fermions

We report on a high statistics lattice QCD calculation of the mass of the [eta] and [eta]' mesons using ASQTAD improved staggered fermions. The calculation used two ensembles with different lattice spacings and pion masses. We also report results for [eta]-[eta]' mixing. The results are in...

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Bibliographic Details
Published in:Physical review. D, Particles, fields, gravitation, and cosmology Particles, fields, gravitation, and cosmology, 2012-07, Vol.86 (1)
Main Authors: Gregory, Eric B, Irving, Alan C, Richards, Christopher M, McNeile, Craig
Format: Article
Language:English
Subjects:
Cosmology
Fermions
Gravitation
Lattices
Mathematical analysis
Mesons
Pions
Quantum chromodynamics
Statistics
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Summary:We report on a high statistics lattice QCD calculation of the mass of the [eta] and [eta]' mesons using ASQTAD improved staggered fermions. The calculation used two ensembles with different lattice spacings and pion masses. We also report results for [eta]-[eta]' mixing. The results are in satisfactory agreement with other lattice calculations using other fermion formulations and with experiment, given the unphysical quark masses used. We see no evidence of abnormal behavior at the lattice spacings studied.
ISSN:1550-7998
1550-2368