Skip to main content
SpringerLink
Log in

Single spin asymmetries in high energy reactions and nonperturbative QCD effects

  • Physics of Elementary Particles and Atomic Nuclei. Theory
  • Published:
Physics of Particles and Nuclei Letters Aims and scope Submit manuscript

Abstract

We discuss some experimental and theoretical results on single spin asymmetries (SSA) in high energy lepton-hadron and hadron-hadron reactions. In particular, recent results on meson SSA obtained by HERMES are considered in detail. We also discuss the SSA results obtained recently by COMPASS, as well as those from BRAHMS, PHENIX and STAR. Special attention is paid to a possible nonperturbative QCD mechanism that might be responsible for the observed meson SSA. This mechanism originates from the spin-flip quark-gluon chromomagnetic interaction induced by the complex topological structure of the QCD vacuum. We argue that in semi-inclusive deep-inelastic scattering a large SSA is expected not only for mesons but also for baryons due to strong nonperturbative final state interactions between ud-diquark and u-quark in the fragmenting proton.

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. M. Burkardt, A. Miller, and W. D. Nowak, “Spin-Polarized High-Energy Scattering of Charged Leptons on Nucleons,” hep-ph/0812.2208.

  2. U. D’Alesio and F. Murgia, “Azimuthal and Single Spin Asymmetries in Hard Scattering Processes,” Prog. Part. Nucl. Phys. 61, 394 (2008).

    Article  ADS  Google Scholar 

  3. A. V. Efremov, Ann. Phys. 13, 651 (2004).

    Article  MATH  Google Scholar 

  4. A. Airapetian et al. (HERMES Collab.), Phys. Rev. Lett. 84, 4047 (2000); Phys. Rev. D 64, 097101 (2001); Phys. Lett. B 622, 14 (2005).

    Article  ADS  Google Scholar 

  5. A. Airapetian et al. (HERMES Collab.),“Single-Spin Asymmetries in Semi-Inclusive Deep-Inelastic Scattering on a Transversely Polarized Hydrogen Target,” Phys. Rev. Lett. 94, 012002 (2005).

    Article  ADS  Google Scholar 

  6. M. Diefenthaler (for the HERMES Collab.), “HERMES Measurements of Collins and Sivers Asymmetries from a Transversely Polarized Hydrogen Target,” hep-ex/0706.2242.

  7. G. L. Kane, J. Pumplin, and W. Repko, “Transverse Quark Polarization in Large P(T) Reactions, E + E − Jets, and Leptoproduction: A Test of QCD,” Phys. Rev. Lett. 41, 1689 (1978).

    Article  ADS  Google Scholar 

  8. D. L. Adams et al. (FNAL-E704 Collab.), “Analyzing Power in Inclusive π+ and π− it Production at High x(F) with a 200-GeV Polarized Proton Beam,” Phys. Lett. B 264, 462 (1991); “Single-Spin Asymmetries in Inclusive Charged Pion Production by Transversely Polarized Antiprotons,” Phys. Rev. Lett. 77, 2626 (1996); E581 Collab. and E704 Collab., “Comparison of Spin Asymmetries and Cross-Sections in π0 Production by 200-GeV Polarized Antiprotons and Protons,” Phys. Lett. B 261, 201 (1991).

    Article  ADS  Google Scholar 

  9. A. D. Krisch, “Hard Collisions of Spinning Protons: Past, Present and Future,” Eur. Phys. J. A 31, 417 (2007).

    Article  ADS  Google Scholar 

  10. B. I. Abelev et al. (STAR Collab.), “Forward Neutral Pion Transverse Single Spin Asymmetries in p + p Collisions at √s = 200 GeV,” Phys. Rev. Lett. 101, 222001 (2008).

    Article  ADS  Google Scholar 

  11. C. Aidala (for the PHENIX and BRAHMS Collab.), “Transversity and Transverse-Momentum-Dependent Distribution Measurements from PHENIX and BRAHMS,” hep-ex/0808.4139.

  12. http://www-hermes.desy.de/.

  13. M. Alekseev et al. (COMPASS Collab.), “Collins and Sivers Transverse Spin Asymmetries for Pions and Kaons on Deuterons,” Phys. Lett. B 673, 127–135 (2009).

    Article  ADS  Google Scholar 

  14. S. Levorato (for the COMPASS Collab.), “Single Spin Asymmetries on a Transversely Polarized Proton Target at COMPASS,” hep-ex/0808.0086; C. Schill (for the COMPASS Collab.), “Transverse Spin Structure of the Nucleon from COMPASS,” Nucl. Phys. Proc. Suppl. 186, 74–77 (2009).

  15. http://www.compass.cern.ch/.

  16. M. Anselmino et al., “Sivers Effect for Pion and Kaon Production in Semi-Inclusive Deep Inelastic Scattering,” Eur. Phys. J. A 39, 89–100 (2009).

    Article  ADS  Google Scholar 

  17. F. Yuan, Phys. Lett. B 575, 45 (2003).

    Article  ADS  Google Scholar 

  18. A. Courtoy et al., Phys. Rev. D 78, 034002 (2008).

    Article  ADS  Google Scholar 

  19. S. J. Brodsky, D. S. Hwang, and I. Schmidt, “Final-State Interactions and Single-Spin Asymmetries in Semi-Inclusive Deep Inelastic Scattering,” Phys. Lett. B 530, 99 (2002).

    Article  ADS  Google Scholar 

  20. T. Schafer and E. V. Shuryak, “Instantons in QCD,” Rev. Mod. Phys. 70, 323 (1998).

    Article  MathSciNet  ADS  Google Scholar 

  21. A. E. Dorokhov, N. I. Kochelev, and Yu. A. Zubov, “Proton Spin within Nonperturbative QCD,” Intern. J. Mod. Phys. A 8, 603 (1993).

    Article  ADS  Google Scholar 

  22. N. I. Kochelev, Phys. Lett. B 426, 149 (1998).

    Article  ADS  Google Scholar 

  23. D. Diakonov, Prog. Part. Nucl. Phys. 51, 173 (2003).

    Article  ADS  Google Scholar 

  24. P. Hoyer and M. Jarvinen, “Soft Rescattering in DIS: Effects of Helicity Flip,” J. High Energy Phys. 0510, 080 (2005).

    Article  ADS  Google Scholar 

  25. I. O. Cherednikov et al., Phys. Lett. B 642, 39 (2006).

    Article  ADS  Google Scholar 

  26. N. I. Kochelev, Yu. M. Bystritskiy, and E. A. Kuraev, to be published.

  27. S. B. Nurushev, “Summary of Experimental Data on High-Energy Spin Physics,” Intern. J. Mod. Phys. A 12, 3433 (1997).

    Article  ADS  Google Scholar 

  28. A. Bravar et al. (E704 Collab.), “Analyzing Power Measurement in Inclusive Λ0 Production with a 200-GeV/c Polarized Proton Beam,” Phys. Rev. Lett. 75, 307 (1995).

    Article  Google Scholar 

  29. A. Bazilevsky et al., “Single Transverse-Spin Asymmetry in Very Forward and Very Backward Neutral Particle Production for Polarized Proton Collisions at s**(1/2) = 200 GeV,” Phys. Lett. B 650, 325 (2007).

    Article  ADS  Google Scholar 

  30. B. Z. Kopeliovich et al., “Leading Neutrons from Polarized pp Collisions,” AIP Conf. Proc. 1056, 199 (2008).

    Article  ADS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Joint Institute for Nuclear Research, Dubna, Russia

    A. E. Dorokhov & N. I. Kochelev

  2. DESY, Zeuthen, Germany

    W. -D. Nowak

Authors
  1. A. E. Dorokhov
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. N. I. Kochelev
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. W. -D. Nowak
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to A. E. Dorokhov.

Additional information

The article is published in the original.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Dorokhov, A.E., Kochelev, N.I. & Nowak, W.D. Single spin asymmetries in high energy reactions and nonperturbative QCD effects. Phys. Part. Nuclei Lett. 6, 440–445 (2009). https://doi.org/10.1134/S154747710906003X

Download citation

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1134/S154747710906003X

Keywords

Search

Navigation