d̄/ū asymmetry and the origin of the nucleon sea

J. C. Peng, G. T. Garvey, T. C. Awes, M. E. Beddo, M. L. Brooks, C. N. Brown, J. D. Bush, T. A. Carey, T. H. Chang, W. E. Cooper, C. A. Gagliardi, D. F. Geesaman, E. A. Hawker, X. C. He, L. D. Isenhower, S. B. Kaufman, D. M. Kaplan, P. N. Kirk, D. D. Koetke, G. KyleD. M. Lee, W. M. Lee, M. J. Leitch, N. Makins, P. L. McGaughey, J. M. Moss, B. A. Mueller, P. M. Nord, B. K. Park, V. Papavassiliou, G. Petitt, P. E. Reimer, M. E. Sadler, P. W. Stankus, W. E. Sondheim, T. N. Thompson, R. S. Towell, R. E. Tribble, M. A. Vasiliev, Y. C. Wang, Z. F. Wang, J. C. Webb, J. L. Willis, D. K. Wise, G. R. Young

Research output: Contribution to journalArticle

Abstract

The Drell-Yan cross section ratios, σ(p + d)/σ(p + p), measured in Fermilab E866, have led to the first determination of d̄(x)/ū(x), d̄(x)-ū(x), and the integral of d̄(x)-ū(x) for the proton over the range 0.02 ≤x≤0.345. The E866 results are compared with predictions based on parton distribution functions and various theoretical models. The relationship between the E866 results and the NMC measurement of the Gottfried integral is discussed. The agreement between the E866 results and models employing virtual mesons indicates that these non-perturbative processes play an important role in the origin of the d̄,ū asymmetry in the nucleon sea.

Original languageEnglish (US)
Article number092004
Pages (from-to)920041-920045
Number of pages5
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume58
Issue number9
StatePublished - Dec 1 1998

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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    Peng, J. C., Garvey, G. T., Awes, T. C., Beddo, M. E., Brooks, M. L., Brown, C. N., Bush, J. D., Carey, T. A., Chang, T. H., Cooper, W. E., Gagliardi, C. A., Geesaman, D. F., Hawker, E. A., He, X. C., Isenhower, L. D., Kaufman, S. B., Kaplan, D. M., Kirk, P. N., Koetke, D. D., ... Young, G. R. (1998). d̄/ū asymmetry and the origin of the nucleon sea. Physical Review D - Particles, Fields, Gravitation and Cosmology, 58(9), 920041-920045. [092004].