Advertisement

Physics of Particles and Nuclei

, Volume 49, Issue 4, pp 552–556 | Cite as

Proton Spin Puzzle and Confinement of Quarks

  • B. F. Kostenko
Article
  • 10 Downloads

Abstract

It is shown that the confinement effect that is significant at great distances from the nucleon center is capable of inducing the appreciable quark helicity flip. A simultaneous change in projections of the orbital angular momentum of quarks on the direction of their motion, which follows from the Dirac equation, ensures the conservation of the total angular momentum of the system. Thus, a part of the proton spin, measured in experiments with deep inelastic scattering of leptons, may be hidden in the orbital angular momentum of quarks.

Notes

REFERENCES

  1. 1.
    J. Ashman, B. Badelek, G. Baum, J. Beaufays, C. P. Bee, C. Benchouk, I. G. Bird, S. C. Brown, M. C. Caputo, H. W. K. Cheung, J. Chima, J. Ciborowski, R. W. Clifft, G. Coignet, F. Combley, et al. (EMC Collab.), Phys. Lett. B 206, 364–370 (1988).ADSCrossRefGoogle Scholar
  2. 2.
    A. Adare, C. Aidala, N. N. Ajitanand, Y. Akiba, R. Akimoto, J. Alexander, M. Alfred, K. Aoki, N. Apadula, Y. Aramaki, H. Asano, E. T. Atomssa, T. C. Awes, B. Azmoun, V. Babintsev, et al. (PHENIX Collab.), Phys. Rev. D 93, 011501-1–011501-8 (2016).ADSCrossRefGoogle Scholar
  3. 3.
    W. Miller, Jr, Symmetry and Separation of Variables (Addison-Wesley, London, 1977).Google Scholar
  4. 4.
    A. H. Cook, Proc. R. Soc. London, Ser. A 383, 247–278 (1982).ADSCrossRefGoogle Scholar
  5. 5.
    J. D. Bjorken and S. D. Drell, Relativistic Quantum Mechanics (McGraw-Hill, New York, 1964).zbMATHGoogle Scholar
  6. 6.
    B. Kostenko, EPJ Web of Conferences 138, 8009 (2017).Google Scholar
  7. 7R7a.
    T. T. Takahashi, H. Matsufuru, Y. Nemoto, and H. Suganuma, Phys. Rev. Lett. 86, 18–21 (2001);ADSCrossRefGoogle Scholar
  8. 7R7b.
    Nucl. Phys. A 680, 159c (2001).Google Scholar
  9. 8.
    C. A. Fletcher, Computational Galerkin Methods (Springer, New York, 1984).CrossRefzbMATHGoogle Scholar
  10. 9.
    A. Airapetian, N. Akopov, Z. Akopov, A. Andrus, E. C. Aschenauer, W. Augustyniak, R. Avakian, A. Avetissian, E. Avetissian, S. Belostotski, N. Bianchi, H. P. Blok, H. Böttcher, A. Borissov, A. Borysenko, et al. (HERMES Collab.), Phys. Rev. D 75, 012007 (2007).ADSCrossRefGoogle Scholar

Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  1. 1.Joint Institute for Nuclear ResearchDubnaRussia

Personalised recommendations