Abstract.
Measurements of azimuthal cross-section asymmetries from deeply virtual Compton scattering on transversely and longitudinally polarized hydrogen and longitudinally polarized deuterium targets at HERMES are reported. By comparing the HERMES results on the transverse target-spin asymmetry with theoretical calculations based on a phenomenological model of generalized parton distributions, a model-dependent constraint on the total angular momentum carried by quarks in the nucleon is obtained.
Similar content being viewed by others
References
D. Mueller, Fortschr. Phys. 42, 101 (1994) hep-ph/9812448.
A. Radyushkin, Phys. Lett. B 385, 333 (1996) hep-ph/9605431.
X. Ji, Phys. Rev. Lett. 78, 610 (1997) hep-ph/9603249.
A. Belitsky, D. Müller, A. Kirchner, Nucl. Phys. B 629, 323 (2002) hep-ph/0112108.
F. Ellinghaus, W.D. Nowak, A.V. Vinnikov, Z. Ye, Eur. Phys. J. C 46, 729 (2006) hep-ph/0506264.
HERMES Collaboration (K. Ackerstaff), Nucl. Instrum. Methods A 417, 230 (1998) hep-ex/9806008.
HERMES Collaboration (Z. Ye), PoS (HEP2005) 120 (2006) hep-ex/0512010.
K. Goeke, M. Polyakov, M. Vanderhaegen, Prog. Part. Nucl. Phys. 47, 401 (2001) hep-ph/0106012.
HERMES Collaboration (M. Kopytin), AIP Conf. Proc. 792, 424 (2005).
M. Vanderhaeghen, P. Guichon, M. Guidal, Computer code for the calculation of DVCS and BH processes in the reaction $ep\rightarrow ep\gamma$ (2001), private communication.
HERMES Collaboration (Z. Ye), hep-ex/0606061 (2006).
HERMES Collaboration (A. Airapetian), hep-ex/0605108 (2006).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Kopytin, M. Longitudinal and transverse target-spin asymmetries associated with DVCS on the proton at HERMES. Eur. Phys. J. A 31, 575–577 (2007). https://doi.org/10.1140/epja/i2006-10231-5
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1140/epja/i2006-10231-5