Skip to main content
SpringerLink
Log in

Valence and sea contributions to the nucleon spin

  • Regular Article - Theoretical Physics
  • Published:
The European Physical Journal C Aims and scope Submit manuscript

Abstract

The first moments of the polarized valence parton distribution functions (PDFs) truncated to the wide Bjorken x region 0.004<x<0.7 are directly (without any fitting procedure) extracted in the next to leading order (NLO) QCD from both COMPASS and HERMES data on pion production in polarized semi-inclusive DIS (SIDIS) experiments. The COMPASS and HERMES data are combined in two ways and two scenarios for the fragmentation functions (FFs) are considered. Two procedures are proposed for an estimation of light sea quark contributions to the proton spin. Both lead to the conclusion that these contributions are compatible with zero within the errors.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. B. Adeva et al. (SMC collaboration), Phys. Lett. B 369, 93 (1996)

    Article  ADS  Google Scholar 

  2. A. Airapetyan et al. (HERMES collaboration), Phys. Rev. D 71, 012003 (2005)

    Article  ADS  Google Scholar 

  3. G. Baum et al. (COMPASS collaboration), COMPASS: a proposal for a common muon and proton apparatus for structure and spectroscopy. CERN-SPSLC-96-14 (1996)

  4. A.N. Sissakian, O.Y. Shevchenko, O.N. Ivanov, Phys. Part. Nucl. 39, 674 (2008)

    Article  Google Scholar 

  5. A.N. Sissakian, O.Y. Shevchenko, O.N. Ivanov, Phys. Rev. D 70, 074032 (2004)

    Article  ADS  Google Scholar 

  6. A.N. Sissakian, O.Y. Shevchenko, O.N. Ivanov, JETP Lett. 82, 53 (2005)

    Article  ADS  Google Scholar 

  7. A.N. Sissakian, O.Y. Shevchenko, O.N. Ivanov, Phys. Rev. D 73, 094026 (2006)

    Article  ADS  Google Scholar 

  8. S. Albino, B.A. Kniehl, G. Kramer, Nucl. Phys. B 803, 42 (2008)

    Article  ADS  Google Scholar 

  9. D. de Florian, R. Sassot, M. Stratmann, Phys. Rev. D 75, 114010 (2007)

    Article  ADS  Google Scholar 

  10. M. Alekseev et al. (COMPASS Collaboration), Phys. Lett. B 660, 458–465 (2008)

    ADS  Google Scholar 

  11. A. Sissakian, O. Shevchenko, O. Ivanov, Eur. Phys. J. C 65, 413 (2010)

    Article  ADS  Google Scholar 

  12. K. Abe et al. (E143 Collaboration), Phys. Lett. B 452, 194 (1999)

    Article  ADS  Google Scholar 

  13. D. de Florian, M. Stratmann, W. Vogelsang, Phys. Rev. D 57, 5811 (1998)

    Article  ADS  Google Scholar 

  14. M. Gluck, P. Jimenez-Delgado, E. Reya, C. Schuck, Phys. Lett. B 664, 133 (2008)

    Article  ADS  Google Scholar 

  15. M. Gluck, P. Jimenez-Delgado, E. Reya, Eur. Phys. J. C 53, 355 (2008)

    Article  ADS  Google Scholar 

  16. M. Alekseev et al. (COMPASS Collaboration), Phys. Lett. B 680, 217 (2009)

    Article  ADS  Google Scholar 

  17. M. Alekseev et al. (COMPASS Collaboration), Phys. Lett. B 693, 227 (2010)

    Article  ADS  Google Scholar 

  18. G. Ingelman, A. Edin, J. Rathsman, Comput. Phys. Commun. 101, 108 (1997)

    Article  ADS  Google Scholar 

  19. E.S. Ageev et al. (COMPASS Collaboration), Phys. Lett. B 612, 154 (2005)

    Article  ADS  Google Scholar 

  20. D. de Florian, R. Sassot, M. Stratmann, W. Vogelsang, Phys. Rev. D 80, 034030 (2009)

    Article  ADS  Google Scholar 

  21. D. Adams et al. (Spin Muon Collaboration (SMC)), Phys. Rev. D 56, 5330 (1997)

    Article  ADS  Google Scholar 

  22. A.V. Kotikov, D.V. Peshekhonov, Phys. At. Nucl. 60, 653 (1997)

    Google Scholar 

  23. A.V. Kotikov, D.V. Peshekhonov, Phys. Rev. D 54, 3162 (1996)

    Article  ADS  Google Scholar 

  24. A.N. Sissakian, O.Y. Shevchenko, O.N. Ivanov, Phys. Rev. D 68, 031502 (2003)

    Article  ADS  Google Scholar 

  25. R.S. Bhalerao, Phys. Rev. C 63, 025208 (2001)

    Article  ADS  Google Scholar 

  26. J.C. Peng, Eur. Phys. J. A 18, 395 (2003)

    Article  ADS  Google Scholar 

  27. C. Bourrely, J. Soffer, F. Buccella, Eur. Phys. J. C 23, 487 (2002)

    Article  ADS  Google Scholar 

  28. M. Wakamatsu, Flavor asymmetry of the polarized sea-quark distributions in the proton. arXiv:1003.2457v1 [hep-ph]

  29. M. Wakamatsu, Phys. Rev. D 67, 034005 (2003)

    Article  ADS  Google Scholar 

  30. S. Kumano, M. Miyama, Phys. Rev. D 65, 034012 (2002)

    Article  ADS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Joint Institute for Nuclear Research, 141980, Dubna, Russia

    O. Yu. Shevchenko, R. R. Akhunzyanov & V. Yu. Lavrentyev

Authors
  1. O. Yu. Shevchenko
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. R. R. Akhunzyanov
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. V. Yu. Lavrentyev
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to O. Yu. Shevchenko.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Shevchenko, O.Y., Akhunzyanov, R.R. & Lavrentyev, V.Y. Valence and sea contributions to the nucleon spin. Eur. Phys. J. C 71, 1713 (2011). https://doi.org/10.1140/epjc/s10052-011-1713-3

Download citation

  • Received:

  • Revised:

  • Published:

  • DOI: https://doi.org/10.1140/epjc/s10052-011-1713-3

Keywords

Search

Navigation