Diffractive production of vector mesons in deep inelastic scattering within k(t) factorization approach
Mar, 2003Citations per year
Abstract:
In this work we give a theoretical description of the elastic vector meson production in diffractive DIS developed within the k_t-factorization formalism. Since the k_t-factorization scheme does not require large values of Q^2+m_V^2, we conduct an analysis that is applicable to all values of Q^2 from photo- up to highly virtual production of vector mesons. The basic quantity in this approach -- the unintegrated gluon structure function -- was for the first time extracted from the experimental data on F_{2p}, thoroughly investigated, and consistently used in the vector meson production calculation. Moreover, by limiting ourselves to the lowest Fock state of the vector meson, we were able to construct in a closed form the theory of spin-angular coupling in the vector meson. This allowed us for the first time to address the production of a vector meson in a given spin-angular state. We performed an extensive analytical and numerical investigation of the properties of 1S, 2S, and D-wave vector meson production reactions. Treating the physical ground state vector mesons as purely 1S states, we observed a good overall agreement with all available experimental data on vector meson production. For the excited states, our analysis predicts a picture which is remarkably different from 1S-state, so that such reactions can be regarded as potential sources of new information on the structure of excited states in vector mesons.Note:
- Ph.D. Thesis (Advisor: J. Speth)
- thesis
- electron p: deep inelastic scattering
- electron p: exclusive reaction
- diffraction
- vector meson: electroproduction
- transverse momentum: factorization
- Compton scattering: off-shell
- photon: electroproduction
- quantum chromodynamics
- p: structure function
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