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arXiv · 1309.7768

Strangeness of the nucleon from Lattice Quantum Chromodynamics

Constantia Alexandrou·Martha Constantinou·Simon Dinter·Vincent Drach·Kyriakos Hadjiyiannakou·Karl Jansen·Giannis Koutsou·Alejandro Vaquero
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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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Constantia Alexandrou, Martha Constantinou, Simon Dinter, Vincent Drach, Kyriakos Hadjiyiannakou, Karl Jansen, Giannis Koutsou, Alejandro Vaquero. 2013-09-30. Strangeness of the nucleon from Lattice Quantum Chromodynamics. https://doi.org/10.1103/physrevd.91.094503

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