On the A-dependence of nuclear generalized parton distributions

Details On the A-dependence of nuclear generalized parton distributions On the A-dependence of nuclear generalized parton distributions

2005-09-15

arxiv.org/abs/hep-ph/0509158v2

J.Phys. G32 (2006) 251-268

Physics

High Energy Physics

High Energy Physics - Phenomenology

Final version published in J. Phys. G. 17 pages, 9 figures

Scientific paper

10.1088/0954-3899/32/3/002

We perform a microscopic evaluation of nuclear GPDs for spin-0 nuclei in the framework of the Walecka model. We demonstrate that the meson (non-nucleon) degrees of freedom dramatically influence nuclear GPDs, which is revealed in the non-trivial and unexpected A-dependence of DVCS observables. In particular, we find that the first moment of the nuclear D-term, d_A(0) ~ A^2.26, which confirms the earlier prediction of M.Polyakov. We find that in the HERMES kinematics, contrary to the free proton case, the nuclear meson degrees of freedom in large nuclei enhance the nuclear DVCS amplitude which becomes comparable to the Bethe-Heitler amplitude, and, thus, give the non-trivial A-dependence to the DVCS asymmetries: as a function of the atomic number the beam-charge asymmetry increases whereas the beam-spin asymmetry decreases slowly.

Affiliated with

Also associated with

No associations

Rating

On the A-dependence of nuclear generalized parton distributions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with On the A-dependence of nuclear generalized parton distributions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the A-dependence of nuclear generalized parton distributions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-406983