Freund, A. and Strikman, M. (2004) Nuclear effects and their interplay in nuclear deeply virtual Compton scattering amplitudes. PHYSICAL REVIEW C, 69 (1): 015203. ISSN 0556-2813, 1089-490X
Full text not available from this repository.Abstract
In this paper we analyze nuclear medium effects on deeply virtual Compton scattering (DVCS) amplitudes in the x(bj) range of 10(-1)-10(-4) for a large range of Q(2) and four different nuclei. We use our nucleon generalized parton distribution model capable of describing all currently available DVCS data on the proton and extend it to the nuclear case using two competing parametrizations of nuclear effects. The two parametrizations, though giving different absolute numbers, yield the same type and magnitude of effects for the imaginary and real parts of the nuclear DVCS amplitude. The imaginary part shows stronger nuclear shadowing effects compared to the inclusive case, i.e., F-2(N), whereas in the real part nuclear shadowing at small x(bj) and antishadowing at large x(bj) combine through evolution to yield an even greater suppression than in the imaginary part up to large values of x(bj). This is the first time that such a combination of nuclear effects has been observed in a hadronic amplitude. The experimental implications will be discussed in a subsequent publication.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PARTON DISTRIBUTIONS; SMALL-X; GLUON; ENHANCEMENT; DIFFRACTION; DEPENDENCE; Q(2); HERA; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 27 Jul 2021 08:30 |
| Last Modified: | 27 Jul 2021 08:30 |
| URI: | https://pred.uni-regensburg.de/id/eprint/38250 |
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