Scalar strange content of the nucleon from lattice QCD

By P. Junnarkar, André Walker-Loud. 2013

215 citations recorded by the source corpus.

The scalar strange-quark matrix element of the nucleon is computed with lattice QCD. A mixed-action scheme is used with domain-wall valence fermions computed on the staggered MILC sea-quark configurations. The matrix element is determined by making use of the Feynman-Hellmann theorem which relates this strange matrix element to the change in the nucleon mass with respect to the strange-quark mass. The final result of this calculation is m_s = 49 +-10 +- 15 MeV and, correspondingly f_s = m_s / m_N = 0.051 +- 0.011 +- 0.016. Given the lack of a quantitative comparison of this phenomenologically important quantity determined from various lattice QCD calculations, we take the opportunity to present such an average. The resulting conservative determination is f_s = 0.043 +- 0.011.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/9b5418a2fbbdbf6f50dee1e670bcdb367bffa1d4

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Nuclear and High Energy Physics

Citations in the corpus

Dark matter and neutrino masses from a scale-invariant multi-Higgs portal (2015, background): “303 [101, 112] is the nucleon form factor (see also [113–115]).”
Status of invisible Higgs decays (2013, background): “r; r is the reduced mass and fN q (f N g ) are the quark (gluon) coecients in the nucleon. We take the values fp s = 0:0447, fp u = 0:0135, and f p d 0203 from an average of recent lattice results [23,24]. The gluon and heavy quark (Q= c;b;t) coecients are related to those of light quarks, and fp g”
Recommendations on presenting LHC searches for missing transverse energy signals using simplified s-channel models of dark matter (2016, background): “The state-of-the-art values for f n,p q are from [48] (for f n,p u and f n,p d ) and [49] (for f n,p s ) and read f n u = 0.”
FLAG Review 2019 (2019, background): “0) [87–89, 91, 92] gu T 10.”