Strange and nonstrange sea quark-gluon effects in nucleons

TL;DR

This paper investigates the role of strange and nonstrange quark-gluon sea components in nucleons, demonstrating how different sea contributions influence low energy properties and aligning theoretical models with experimental data.

Contribution

It introduces an extended Fock space wavefunction approach to analyze the impact of various sea components on nucleon properties, highlighting the significance of vector sea contributions.

Findings

Vector sea significantly influences hadronic structure

Scalar and tensor seas are less dominant but still relevant

Model results agree with experimental measurements

Abstract

Probabilities of various Fock states with strange and nonstrange quark-gluon sea contents are calculated to probe the hadronic structure. Particularly for nucleon, we find various contributions to the low energy properties from scalar, vector and tensor sea in addition to three valence quarks. We focus on the importance of individual sea contributions to the low energy parameters of nucleon by taking the strange and non strange quark-gluon content to the hadron sea. We confirm that the extended Fock space wavefunction is capable of explaining the experimental results where vector sea plays a crucial role in studying hadronic structure while scalar and tensor sea appears to be less dominating due to quark-spin flip process but cannot be neglected. Some of the properties like spin distribution and gA/gV ratio seem to be the most affected by the change in the statistically determined coefficients. Detailed analysis includes different approximations within the statistical approach to test the validity of the model chosen. Phenomenological implication of such sea affecting these properties is also discussed and the results are compared with the experiments.