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Flavor Structure of Intrinsic Nucleon Sea

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Abstract

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.

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Authors and Affiliations

  1. Physics Department, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA

    Jen-Chieh Peng

  2. Institute of Physics, Academia Sinica, Taipei, 11529, Taiwan

    Wen-Chen Chang & Hai-Yang Cheng

  3. Department of Physics, University of Kentucky, Lexington, KY, 40506, USA

    Keh-Fei Liu

Authors
  1. Jen-Chieh Peng
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  2. Wen-Chen Chang
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  3. Hai-Yang Cheng
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  4. Keh-Fei Liu
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Correspondence to Jen-Chieh Peng.

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Peng, JC., Chang, WC., Cheng, HY. et al. Flavor Structure of Intrinsic Nucleon Sea. Few-Body Syst 56, 349–354 (2015). https://doi.org/10.1007/s00601-015-0951-6

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