Strange Asymmetries in the Nucleon Sea

TL;DR

This paper investigates relativistic effects on strange form factors and quark asymmetries in nucleons, highlighting their impact on interpreting experimental data within a chiral cloud model.

Contribution

It introduces relativistic corrections to strange form factors within a light-cone formalism, emphasizing their significance for understanding experimental measurements.

Findings

Relativistic corrections significantly affect strange axial and vector form factors.

Correlations between strange form factors and quark asymmetries are demonstrated.

Implications for interpreting Jefferson Lab data are discussed.

Abstract

Relativistic corrections to the strange axial form factor are evaluated within a light-cone formalism, taking into account effects due to the breaking of Lorentz covariance associated with the use of one-body currents. Similar corrections are known to also be needed for the magnetic form factor, and we discuss the importance of these for recent data on strange electromagnetic form factors from the HAPPEX Collaboration at Jefferson Lab. The strange vector form factors, the strange axial charge, and the asymmetries in strange quark distributions are shown to be consistently correlated within the chiral cloud model.