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The strange quark condensate in the nucleon in 2+1 flavor QCD

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arxiv 0905.2432 v2 pith:XBXDRLK6 submitted 2009-05-14 hep-lat hep-ph

D. Toussaint , W. Freeman (for the MILC Collaboration) This is my paper · ORCID
classification hep-lathep-ph
keywords strangenucleonpartialquarkschemecalculatechiralcondensate
verification ladder T0 review T1 audit T2 compute T3 formal
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We calculate the "strange quark content of the nucleon", <N| s s_bar |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 strange quarks. After continuum and chiral extrapolations, the result is <N |s s_bar |N> = 0.69 +- 0.07(statistical) +- 0.09(systematic), in the modified minimal subtraction scheme (2 GeV), or for the renormalization scheme invariant form, m_s partial{M_N}/partial{m_s} = 59(6)(8) MeV.

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Cited by 2 Pith papers

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  1. Unveiling the Strong Interaction origin of Baryon Masses with Lattice QCD

    hep-lat 2024-11 conditional novelty 6.0 of 10

    First-principles lattice QCD decomposes baryon masses into quark sigma terms and a roughly flavor-independent gluon trace anomaly around 1 GeV.

  2. A self-consistent Higgs-portal framework for dark matter--admixed neutron stars: Collider-motivated benchmarks meet multimessenger constraints

    astro-ph.HE 2026-07 conditional novelty 5.0 of 10

    Adding heavy dark matter to neutron stars via nχ=FχnB softens the equation of state and lowers the maximum mass, but the vector interaction invoked is numerically negligible.

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