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Strangeness of the nucleon from Lattice Quantum Chromodynamics

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arxiv 1309.7768 v2 pith:5LBITM7B submitted 2013-09-30 hep-lat hep-ph

Constantia Alexandrou , Martha Constantinou , Simon Dinter , Vincent Drach , Kyriakos Hadjiyiannakou , Karl Jansen , Giannis Koutsou , Alejandro Vaquero This is my paper · ORCID
classification hep-lathep-ph
keywords latticeeffectsnucleonstrangenesssystematicvalueableanalysis
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

We present a non-perturbative calculation of the strangeness of the nucleon $y_N$ within the framework of lattice QCD. This observable is known to be an important cornerstone to interpret results from direct dark matter detection experiments. We perform a lattice computation for $y_N$ with an analysis of systematic effects originating from discretization, finite size, chiral extrapolation and excited state effects leading to the value of $y_N= 0.173(50)$. The rather large uncertainty of this value of $y_N$ is dominated by systematic uncertainties which we were able to quantify in this work.

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  1. Nucleon axial, tensor and scalar charges and $\sigma$-terms in lattice QCD

    hep-lat 2019-09 conditional novelty 6.0 of 10

    Lattice QCD at physical pion mass with Nf=2+1+1 twisted mass fermions yields g_A^{u-d}=1.286(23), sigma_piN=41.6(3.8) MeV and per-flavor charges including charm.

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