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Full text not available from this repository. (Request a copy)Abstract
Exclusive rho(0)-meson electroproduction is studied in the HERMES experiment, using a 27.6 GeV longitudinally polarized electron/positron beam and unpolarized hydrogen and deuterium targets in the kinematic region 0.5 GeV2 < Q(2) < 7.0 GeV2, 3.0 GeV < W < 6.3 GeV, and -t' < 0.4 GeV2. Real and imaginary parts of the ratios of the natural-parity-exchange helicity amplitudes T-11 (gamma*(T) -> rho T), T-01 (gamma*(T) -> rho(L)), T-10 (gamma*(L) -> rho(T)), and T1-1 (gamma*(-T) -> rho(T)) to T-00 (gamma*(L) -> rho(L)) are extracted from the data. For the unnatural-parity-exchange amplitude U-11, the ratio vertical bar U-11/T-00 vertical bar is obtained. The Q(2) and t' dependences of these ratios are presented and compared with perturbative QCD predictions.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | VECTOR-MESON PRODUCTION; GENERALIZED PARTON DISTRIBUTIONS; ELASTIC ELECTROPRODUCTION; DIFFRACTIVE ELECTROPRODUCTION; J/PSI MESONS; P(0) MESONS; HERA; SCATTERING; SPIN; QCD; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 23 Jun 2020 05:41 |
| Last Modified: | 23 Jun 2020 05:41 |
| URI: | https://pred.uni-regensburg.de/id/eprint/21035 |
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