Properties of light pseudoscalars from lattice QCD with HISQ ensembles

A. Bazavov, R. S. Van de Water, C. Bernard, M. Lightman, C. DeTar, L. Levkova, M. Oktay, W. Freeman, J. Kim, William D Toussaint, Steven Gottlieb, U. M. Heller, J. E. Hetrick, J. Laiho, J. Osborn, R. L. Sugar

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Abstract

We fit lattice-QCD data for light-pseudoscalar masses and decay constants, from HISQ configurations generated by MILC, to SU(3) staggered chiral perturbation theory. At present such fits have rather high values of χ2/d.o.f., possibly due to the lack of ensembles with lighter-than-physical sea strange-quark masses. We propose solutions to this problem for future work. We also perform simple linear interpolations near the physical point on two ensembles with different lattice spacings, and obtain the preliminary result (fK/fπ)phys = 1.1872(41) in the continuum limit.

Original languageEnglish (US)
JournalProceedings of Science
Volume139
StatePublished - Jan 1 2011
Event29th International Symposium on Lattice Field Theory, Lattice 2011 - Squaw Valley, Lake Tahoe, United States
Duration: Jul 10 2011Jul 16 2011

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ASJC Scopus subject areas

  • General

Cite this

Bazavov, A., Van de Water, R. S., Bernard, C., Lightman, M., DeTar, C., Levkova, L., Oktay, M., Freeman, W., Kim, J., Toussaint, W. D., Gottlieb, S., Heller, U. M., Hetrick, J. E., Laiho, J., Osborn, J., & Sugar, R. L. (2011). Properties of light pseudoscalars from lattice QCD with HISQ ensembles. Proceedings of Science, 139.