Hyperon sigma terms for 2+1 quark flavors

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dc.contributor.authorHorsley, R.
dc.contributor.authorNakamura, Y.
dc.contributor.authorPerlt, H.
dc.contributor.authorPleiter, D.
dc.contributor.authorRakow, P.
dc.contributor.authorSchierholz, G.
dc.contributor.authorSchiller, A.
dc.contributor.authorStüben, H.
dc.contributor.authorWinter, F.
dc.contributor.authorZanotti, J.
dc.date.issued2012
dc.description.abstractQCD lattice simulations determine hadron masses as functions of the quark masses. From the gradients of these masses and using the Feynman-Hellmann theorem the hadron sigma terms can then be determined. We use here a novel approach of keeping the singlet quark mass constant in our simulations which upon using an SU(3) flavor symmetry breaking expansion gives highly constrained (i.e. few parameter) fits for hadron masses in a multiplet. This is a highly advantageous procedure for determining the hadron mass gradient as it avoids the use of delicate chiral perturbation theory. We illustrate the procedure here by estimating the light and strange sigma terms for the baryon octet.
dc.description.statementofresponsibilityR. Horsley, Y. Nakamura, H. Perlt, D. Pleiter, P. E. L. Rakow, G. Schierholz, A. Schiller, H. Stüben, F. Winter, and J. M. Zanotti, (QCDSF-UKQCD Collaboration)
dc.identifier.citationPhysical Review D: Particles, Fields, Gravitation and Cosmology, 2012; 85(3):034506:1-034506:12
dc.identifier.doi10.1103/PhysRevD.85.034506
dc.identifier.issn1550-7998
dc.identifier.issn1550-2368
dc.identifier.orcidZanotti, J. [0000-0002-3936-1597]
dc.identifier.urihttp://hdl.handle.net/2440/76479
dc.language.isoen
dc.publisherAmerican Physical Soc
dc.rights© 2012 American Physical Society
dc.source.urihttps://doi.org/10.1103/physrevd.85.034506
dc.titleHyperon sigma terms for 2+1 quark flavors
dc.typeJournal article
pubs.publication-statusPublished

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