Spin Dependence of Diffractive Vector Meson Production
Abstract
I review the recent progress in the theory of s-channel helicity nonconservation (SCHNC) effects in diffractive DIS. SCHNC in diffractive vector meson production is an unique probe of the spin-orbit coupling and Fermi motion of quarks in vector mesons. Photo- and electroproduction of the $\phi$ and its radial and angular excitations at Jlab is perfectly posed to probe SCHNC in QCD pomeron exchange. I also discuss the unitarity driven demise of the Burkhardt-Cottingham sum rule and large & scaling departure from the Wandzura-Wilczek relation.
- Publication:
-
arXiv e-prints
- Pub Date:
- August 1999
- DOI:
- 10.48550/arXiv.hep-ph/9908453
- arXiv:
- arXiv:hep-ph/9908453
- Bibcode:
- 1999hep.ph....8453N
- Keywords:
-
- High Energy Physics - Phenomenology
- E-Print:
- 8 pages, 3 figures. Joint INT / Jefferson Lab Workshop on `Exclusive And Semiexclusive Processes At High Momentum Transfer', JLab, 20-22 May 1999. Several typos corrected, one reference added