References - Bogoliubov Laboratory of Theoretical Physics - JINR

5 Conclusions
Transverse Momentum Dependent distribution and fragmentation functions have been
found as one of the main tool to access spin-orbit correlations of the partons in the nucleon.
Measurements of Single (and Double) Spin Asymmetry have shown that the transverse
degrees of freedom are crucial in understanding of the nucleon structure. In the last years,
a significant amount of experimental data from several Laboratories has begun to come
out. In this scenario, CLAS play an important role, being the only experiment having
access to the large-x region, where model predictions have the biggest differences among
each other.
With the foreseen large step forward in terms of luminosity and detection capability,
the measurements planned to start in 2015 at the Jefferson Laboratory with the CLAS12
detector will provide information on the internal structure of the nucleon with unprecedented
quality.
References
[1] J. Ashman et al, Phys. Lett. B206, 364 (1988).
[2] D. Adams et al, Phys.Rev.D56, 5330 (1997).
[3] K. Abe et al,Phys. Rev. D58, 112003 (1998).
[4] P. Anthony et al, Phys. Lett. B458, 529 (1999).
[5] K. Ackerstaff et al, Phys. Lett. B464, 123 (1999).
[6] A. Airapetianet al, Phys.Rev.D71, 012003 (2005).
[7] R. Fatemi et al, Phys. Rev. Lett. 91, 222002 (2003).
[8] S.J. Brodsky, D.S. Hwang and I. Schmidt, Phys. Lett. B530, 99 (2002).
[9] J.C. Collins, Nucl. Phys. B396, 161 (1993).
[10] J.C. Collins, Phys. Lett. B536, 43 (2002).
[11] X. Ji and F. Yuan, Phys. Lett. B543, 66 (2002).
[12] A. V. Belitsky, X. Ji and F. Yuan, Nucl. Phys. B656, 165 (2003).
[13] D.Boer,P.J.Muldersand F. Pijlman, Nucl. Phys. B667, 201 (2003).
[14] X.Ji,J.Maand F. Yuan, Phys. Rev. D71, 034005 (2005).
[15] J.C. Collins and A. Metz, Phys. Rev. Lett. 93, 252001 (2004).
[16] X. Ji, J.-P. Ma and F. Yuan, Nucl. Phys. B652, 383 (2003).
[17] P.J. Mulders and R.D. Tangerman, Nucl. Phys. B461, 197 (1996);
A. Kotzinian, Nucl. Phys. B441, 234 (1995);
A. Kotzinian and P.J. Mulders, Phys. Rev. D54, 1229 (1996).
[18] A. Airapetian et al, Phys. Rev. Lett. 84, 4047 (2000).
[19] A.V. Efremov, K. Goeke and P. Schweitzer, Czech. J. Phys. 55, A189 (2005).
[20] A. Airapetian al, Phys. Rev. Lett. 94, 012002 (2005);
V.Y. Alexakhin et al, Phys. Rev. Lett. 94, 202002 (2005).
[21] W. Vogelsang and F. Yuan, Phys. Rev. D72, 054028 (2005).
[22] J. C. Collins et al, Phys.Rev.D73, 014021 (2006).
[23] A.V. Efremov et al, Phys. Lett. B612, 233 (2005).
[24] M. Anselmino et al, Phys.Rev.D74, 074015 (2006).
[25] H. Avakian et al., CLAS proposal PR-08-015.
[26] B. Pasquini et al. arXiv:0806.2298
[27] Avakian et al., Phys.Rev.D78,114024 (2008).
[28] http://www.jlab.org/12GeV/
[29] H. Avakian et al., CLAS proposal PR-09-009;
K. Hafidi et al., CLAS proposal PR-09-007.
[30] H. Avakian et al., CLAS proposal PR12-07-107;
H. Avakian et al., CLAS proposal PR-09-008.
249