Skip to main content
SpringerLink
Log in

Deeply virtual Compton scattering and generalized parton distributions at CLAS⋆

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

Abstract

The exclusive electroproduction of real photons and mesons at high momentum transfer allows us to access the Generalized Parton Distributions (GPDs). The formalism of the GPDs provides a unified description of the hadronic structure in terms of quark and gluonic degrees of freedom. In particular, the Deeply Virtual Compton Scattering (DVCS), ep → e′p′γ , is one of the key reactions to determine the GPDs experimentally, as it is the simplest process that can be described in terms of GPDs. A dedicated experiment to study DVCS has been carried out in Hall B at Jefferson Lab. Beam-spin asymmetries, resulting from the interference of the Bethe-Heitler process and DVCS have been extracted over the widest kinematic range ever accessed for this reaction ( 1.2 < Q 2 < 3.7 (GeV/c 2, 0.09 < - t < 1.3 (GeV/c 2, 0.13 < x B < 0.46 . In this paper, the results obtained experimentally are shown and compared to GPD parametrizations.

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. D. Muller, D. Robaschik, B. Geyer, F.M. Dittes, J. Horejsi, Fortschr. Phys. 42, 101 (1994).

    Google Scholar 

  2. A.V. Radyushkin, Phys. Rev. D 56, 5524 (1997).

    Google Scholar 

  3. X.-D. Ji, Phys. Rev. Lett. 78, 610 (1997).

    Google Scholar 

  4. M. Burkardt, Phys. Rev. D 62, 071503 (2000).

    Google Scholar 

  5. M. Diehl, Eur. Phys. J. C 25, 223 (2002).

    Google Scholar 

  6. X.-D. Ji, J. Osborne, Phys. Rev. D 58, 094018 (1998).

    Google Scholar 

  7. A.V. Belitski, D. Muller, A. Kirchner, Nucl. Phys. B 629, 323 (2002).

    Google Scholar 

  8. A.V. Radyushkin, in At the Frontier of Particle Physics - Handbook of QCD, edited by M. Shifman (World Scientific, Singapore, 2001) p. 1037

  9. CLAS Collaboration (S. Stepanyan), Phys. Rev. Lett. 87, 182002 (2001).

    Google Scholar 

  10. HERMES Collaboration (A. Airapetian), Phys. Rev. Lett. 87, 182001 (2001).

    Google Scholar 

  11. CLAS Collaboration (S. Chen), Phys. Rev. Lett. 97, 072002 (2006).

  12. HERMES Collaboration (A. Airapetian), Phys. Rev. D 75, 011103(R) (2007).

    Google Scholar 

  13. C. Munoz Camacho, Phys. Rev. Lett. 97, 262002 (2006).

    Google Scholar 

  14. B.A. Mecking, Nucl. Instrum. Methods A 503, 513 (2003).

  15. CLAS Collaboration (F.X. Girod), Phys. Rev. Lett. 100, 162002 (2008).

    Google Scholar 

  16. J.M. Laget, arXiv:0708.1250 hep-ph (2007).

  17. N. Kivel, M.V. Polyakov, M. Vanderhaeghen, Phys. Rev. D 63, 114014 (2001).

    Google Scholar 

  18. H.S. Jo, PhD Thesis, Université Paris Sud, Orsay, France (2007).

Download references

Author information

Authors and Affiliations

  1. IPN, Orsay, France

    S. Niccolai

Authors
  1. S. Niccolai
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to S. Niccolai.

Additional information

Z.-E. Meziani

Original article based on material presented at HADRON 2007.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Niccolai, S. Deeply virtual Compton scattering and generalized parton distributions at CLAS⋆ . Eur. Phys. J. A 38, 141–144 (2008). https://doi.org/10.1140/epja/i2008-10653-y

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1140/epja/i2008-10653-y

PACS

Search

Navigation