摘要： 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. 其他題名： Few-Body Syst 出版者： Vienna: Springer Vienna 出版日期： 2015-09-01 出處： Few-body systems, 2015-09, Vol.56 (6-9), p.349-354 資源來源： EBSCOhost Academic Search Premier 版權： Springer-Verlag Wien 2015 識別號： ISSN: 0177-7963 識別號： EISSN: 1432-5411 識別號： DOI: 10.1007/s00601-015-0951-6 識別號： CODEN: FBSYEQ
