Strangeness of the nucleon from Lattice Quantum Chromodynamics

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.

14 pages, 3 figures, version accepted by PRD

References in corpus (6)

• First results from DAMA/LIBRA and the combined results with DAMA/NaI
• Results from a Search for Light-Mass Dark Matter with a P-type Point Contact Germanium Detector
• Results from a Low-Energy Analysis of the CDMS II Germanium Data
• Light hadrons from lattice QCD with light (u,d), strange and charm dynamical quarks
• Lattice QCD at the physical point meets SU(2) chiral perturbation theory
• Global fits of the Minimal Universal Extra Dimensions scenario

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• Review of the electric dipole moment of light nuclei
• Phi meson spectral moments and QCD condensates in nuclear matter
• Consistency between SU(3) and SU(2) chiral perturbation theory for the nucleon mass
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• Chiral Effective Theory Methods and their Application to the Structure of Hadrons from Lattice QCD
• Disconnected quark loop contributions to nucleon observables using $N_f=2$ twisted clover fermions at the physical value of the light quark mass
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