The concept of intrinsic charm suggested by Brodsky et al. is extended to lighter quarks. Extraction of the intrinsic ū, d̄, and s̄ seas is obtained from an analysis of the d̄ − ū, s + s̄, and ū + d̄ − s −s̄ distributions. The connection between the intrinsic/extrinsic seas and the connected/disconnected seas in lattice QCD is also examined. It is shown that the connected and disconnected components for the ū(x) + d̄(x) sea can be separated. The striking x-dependence of the [s(x) + s̄(x)]/[ū(x) + d̄(x)] ratio is interpreted as an interplay between the connected and disconnected seas.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics