Double spin asymmetry in exclusive ρ0 muoproduction at COMPASS

Abstract

The longitudinal double spin asymmetry A1 ρ for exclusive leptoproduction of ρ0 mesons, μ+N→μ+N+ρ, is studied using the COMPASS 2002 and 2003 data. The measured reaction is incoherent exclusive ρ0 production on polarised deuterons. The Q2 and x dependence of A1 ρ is presented in a wide kinematical range, 3×10-3<Q2< 7 (GeV/c)2 and 5×10-5<x<0.05. The results presented are the first measurements of A1 ρ at small Q2 (Q2< 0.1 (GeV/c)2) and small x (x<3×10-3). The asymmetry is in general compatible with zero in the whole kinematical range.

This is a preview of subscription content, access via your institution.

References

  1. 1.

    K. Schilling, G. Wolf, Nucl. Phys. B 61, 381 (1973)

    Article  ADS  Google Scholar 

  2. 2.

    NMC Collaboration, M. Arneodo et al., Nucl. Phys. B 429, 503 (1994)

    Article  ADS  Google Scholar 

  3. 3.

    E665 Collaboration, M.R. Adams et al., Z. Phys. C 74, 237 (1997)

    Article  Google Scholar 

  4. 4.

    ZEUS Collaboration, J. Breitweg et al., Eur. Phys. J. C 12, 393 (2000)

    Article  ADS  Google Scholar 

  5. 5.

    H1 Collaboration, C. Adloff et al., Eur. Phys. J. C 13, 371 (2000)

    Article  ADS  Google Scholar 

  6. 6.

    H1 Collaboration, C. Adloff et al., Phys. Lett. B 539, 25 (2002)

    Article  ADS  Google Scholar 

  7. 7.

    HERMES Collaboration, K. Ackerstaff et al., Eur. Phys. J. C 18, 303 (2000)

    ADS  Google Scholar 

  8. 8.

    A. Sandacz (on behalf of the COMPASS Collaboration), Nucl. Phys. B Proc. Suppl. 146, 581 (2005)

    Article  Google Scholar 

  9. 9.

    I.P. Ivanov, N.N. Nikolaev, JETP Lett. C 29, 294 (1999)

    Article  ADS  Google Scholar 

  10. 10.

    I.P. Ivanov, Diffractive production of vector mesons in Deep Inelastic Scattering within kt-factorization approach, hep-ph/0303053

  11. 11.

    S.I. Manaenkov, Regge description of spin–spin asymmetry in photon diffractive dissociation, Preprint DESY 99-016 [hep-ph/9903405]

  12. 12.

    H. Fraas, Nucl. Phys. B 113, 532 (1976)

    Article  ADS  Google Scholar 

  13. 13.

    HERMES Collaboration, A. Airapetian et al., Phys. Lett. B 513, 301 (2001)

    Article  ADS  Google Scholar 

  14. 14.

    J.C. Collins, L. Frankfurt, M. Strikman, Phys. Rev. D 56, 2982 (1997)

    Article  ADS  Google Scholar 

  15. 15.

    A.D. Martin, M.G. Ryskin, T. Teubner, Phys. Rev. D 55, 4329 (1997)

    Article  ADS  Google Scholar 

  16. 16.

    M.G. Ryskin, Phys. Atom. Nucl. 62, 315 (1999) [Yad. Fiz. 62, 350 (1999)]

    ADS  Google Scholar 

  17. 17.

    S.V. Goloskokov, P. Kroll, Eur. Phys. J. C 42, 281 (2005)

    Article  ADS  Google Scholar 

  18. 18.

    S.V. Goloskokov, P. Kroll, hep-ph/0611290

  19. 19.

    HERMES Collaboration, A. Airapetian et al., Eur. Phys. J. C 29, 171 (2003)

    ADS  Google Scholar 

  20. 20.

    A. Tripet, Nucl. Phys. B Proc. Suppl. 79, 529 (1999)

    Article  ADS  Google Scholar 

  21. 21.

    COMPASS Collaboration, P. Abbon et al., Nucl. Instrum. Methods A 577, 455 (2007)

    Article  ADS  Google Scholar 

  22. 22.

    J. Kiryluk, Ph.D. thesis, Warsaw University, 2000

  23. 23.

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

    Google Scholar 

  24. 24.

    E665 Collaboration, M.R. Adams et al., Phys. Rev. Lett. 74, 1525 (1995)

    Article  ADS  Google Scholar 

  25. 25.

    T. Bauer et al., Rev. Mod. Phys. 50, 261 (1978) [Erratum ibid 51, 407 (1979)]

    Article  ADS  Google Scholar 

  26. 26.

    A. Tripet, Ph.D. thesis, Universität Bielefeld, 2002

  27. 27.

    K. Kurek, QED radiative corrections in exclusive ρ0 leptoproduction, preprint DESY-96-209, June 1996 [hep-ph/9606240]

  28. 28.

    SMC Collaboration, B. Adeva et al., Phys. Rev. D 58, 112001 (1998)

    Article  ADS  Google Scholar 

  29. 29.

    E143 Collaboration, K. Abe et al., Phys. Rev. D 58, 112003 (1998)

    Article  ADS  Google Scholar 

  30. 30.

    E155 Collaboration, P.L. Anthony et al., Phys. Lett. B 463, 339 (1999)

    Article  ADS  Google Scholar 

  31. 31.

    SMC Collaboration, B. Adeva et al., Phys. Rev. D 60, 072004 (1999) [Erratum ibid 62, 079902 (2000)]

    Article  ADS  Google Scholar 

  32. 32.

    HERMES Collaboration, A. Airapetian et al., Phys. Rev. D 75, 012007 (2007)

    Article  ADS  Google Scholar 

  33. 33.

    COMPASS Collaboration, V.Y. Alexakhin et al., Phys. Lett. B 647, 8 (2007)

    Article  ADS  Google Scholar 

  34. 34.

    COMPASS Collaboration, V.Y. Alexakhin et al., Phys. Lett. B 647, 330 (2007)

    Article  ADS  Google Scholar 

Download references

Author information

Affiliations

Authors

Consortia

Corresponding author

Correspondence to G.K. Mallot.

Additional information

PACS

13.60.Le; 13.88.+e

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Alekseev, M., Alexakhin, V., Alexandrov, Y. et al. Double spin asymmetry in exclusive ρ0 muoproduction at COMPASS. Eur. Phys. J. C 52, 255–265 (2007). https://doi.org/10.1140/epjc/s10052-007-0376-6

Download citation

Keywords

  • Vector Meson
  • Dynamic Nuclear Polarisation
  • Kinematical Range
  • HERMES Collaboration
  • Deuteron Target