







Item type: | Article | ||||
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Journal or Publication Title: | The European Physical Journal C | ||||
Publisher: | SPRINGER | ||||
Place of Publication: | NEW YORK | ||||
Volume: | 71 | ||||
Number of Issue or Book Chapter: | 4 | ||||
Date: | 2011 | ||||
Institutions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer | ||||
Identification Number: |
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Keywords: | VECTOR-MESON PRODUCTION; GENERALIZED PARTON DISTRIBUTIONS; ELASTIC ELECTROPRODUCTION; DIFFRACTIVE ELECTROPRODUCTION; J/PSI MESONS; P(0) MESONS; HERA; SCATTERING; SPIN; QCD; | ||||
Dewey Decimal Classification: | 500 Science > 530 Physics | ||||
Status: | Published | ||||
Refereed: | Yes, this version has been refereed | ||||
Created at the University of Regensburg: | Yes | ||||
Item ID: | 65063 |
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 ...

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.
Metadata last modified: 19 Dec 2024 11:12