On the s-sbar asymmetry of the nucleon sea
C. Avila, I. Monroy, J.C. Sanabria, J. Magnin
TL;DR
This paper investigates the asymmetry between strange quarks and antiquarks in the nucleon sea using a Kaon-Hyperon model, fitting parameters to experimental data and exploring implications for the Weinberg angle measurement.
Contribution
It introduces a model incorporating Kaon-Hyperon states to explain the s-anti s asymmetry, calibrated with global DIS data, and discusses its impact on electroweak measurements.
Findings
The model successfully fits the s-anti s asymmetry data.
The asymmetry could influence the NuTeV measurement of the Weinberg angle.
Potential effects on precision electroweak tests are discussed.
Abstract
We study the asymmetry in the nucleon sea using a model in which the proton wave function includes a Kaon-Hyperon Fock state. Parameters of the model are fixed by fitting the asymmetry obtained from global fits to Deep Inelastic Scattering data. We discuss possible effects of the asymmetry on the measurement of the Weinberg angle by the NuTeV Collaboration.
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Taxonomy
TopicsQuantum Chromodynamics and Particle Interactions · Particle physics theoretical and experimental studies · Scientific Research and Discoveries