Anomalous A-dependence of diffractive leptoproduction of the radial excitation ϱ‧(2 S)
Abstract
We predict a strikingly different A- and Q2-dependence of quasielastic leptoproduction of the ϱ0(1 S)-meson and its radial excitation ϱ‧(2 S) on nuclei. Whereas for ϱ 0 production the nuclear transparency TA decreases monotonically with A, for the ϱ‧ nuclear transparency TA can have the counterintuitive nonmonotonic A-dependence, having a minimum for light nuclei, and increasing with A for medium and heavy nuclei. Strong enhancement of the {ϱ‧}/{ϱ 0} cross section ratio makes nuclear targets of the ϱ‧-factory. The origin of the anomalous A-dependence is in the interplay of color transparency effects with the nodal structure of the ϱ‧ wave function. The predicted effects take place at moderate Q2 ⪅ (2-3) GeV 2, which can be explored in high statistics experiments at CEBAF.
- Publication:
-
Physics Letters B
- Pub Date:
- November 1994
- DOI:
- 10.1016/0370-2693(94)91154-1
- arXiv:
- arXiv:nucl-th/9405025
- Bibcode:
- 1994PhLB..339..194N
- Keywords:
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- Nuclear Theory;
- High Energy Physics - Phenomenology
- E-Print:
- 10 pages, 4 figures (to be requested), Juelich preprint KFA-IKP(Th)-1994-18