Strange quark condensate in the nucleon in 2+1 flavor QCD

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Abstract

We calculate the "strange quark content of the nucleon," N|s̄s|N, which is important for interpreting the results of some dark matter detection experiments. The method is to evaluate quark-line disconnected correlations on the MILC lattice ensembles, which include the effects of dynamical light and strange quarks. After continuum and chiral extrapolations, the result is N|s̄s|N=0.69(7)stat(9)syst, in the modified minimal subtraction scheme (2 GeV) regularization, or for the renormalization scheme invariant form, ms∂MN∂ms=59(6)(8)MeV.

Original languageEnglish (US)
Article number122002
JournalPhysical Review Letters
Volume103
Issue number12
DOIs
StatePublished - Sep 18 2009

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condensates
quantum chromodynamics
quarks
subtraction
extrapolation
dark matter
continuums

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Strange quark condensate in the nucleon in 2+1 flavor QCD. / Toussaint, William D; Freeman, W.

In: Physical Review Letters, Vol. 103, No. 12, 122002, 18.09.2009.

Research output: Contribution to journalArticle

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