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Exclusive \(\rho^{0}\) production in deep inelastic electron-proton scattering at HERA
- Source :
- Physics Letters B, 356. Elsevier, Physics Letters B, 356 (4), Scopus-Elsevier
- Publication Year :
- 1995
-
Abstract
- The exclusive production of $\rho^0$ mesons in deep inelastic electron-proton scattering has been studied using the ZEUS detector. Cross sections have been measured in the range $7 < Q^2 < 25$ GeV$^2$ for $\gamma^*p$ centre of mass (c.m.) energies from 40 to 130 GeV. The $\gamma^*p \to \rho^0 p$ cross section exhibits a $Q^{-(4.2 \pm 0.8 ^{+1.4}_{-0.5})}$ dependence and both longitudinally and transversely polarised $\rho^0$'s are observed. The $\gamma^*p \to \rho^0 p$ cross section rises strongly with increasing c.m. energy, when compared with NMC data at lower energy, which cannot be explained by production through soft pomeron exchange. The data are compared with perturbative QCD calculations where the rise in the cross section reflects the increase in the gluon density at low $x$. the gluon density at low $x$.<br />Comment: 22 pages, latex, 4 figures appended
- Subjects :
- Nuclear and High Energy Physics
Particle physics
Meson
7. Clean energy
01 natural sciences
High Energy Physics - Experiment
Nuclear physics
Pomeron
Cross section (physics)
0103 physical sciences
photoproduction
cross section measurement
010306 general physics
DETECTOR
Physics
Quantum chromodynamics
Research Groups and Centres\Physics\Low Temperature Physics
010308 nuclear & particles physics
Scattering
Faculty of Science\Physics
Perturbative QCD
ELECTROPRODUCTION
ZEUS
HERA
QCD
Gluon
High Energy Physics::Experiment
Subjects
Details
- ISSN :
- 03702693
- Database :
- OpenAIRE
- Journal :
- Physics Letters B, 356. Elsevier, Physics Letters B, 356 (4), Scopus-Elsevier
- Accession number :
- edsair.doi.dedup.....4e2f06ce7a0abb10b88755000b67753f