The exclusive production of ϱ0 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 GeV2 for gamma*p centre of mass (c.m.) energies 40 to 130 GeV. The y*p → ϱ0p 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.
Exclusive ϱ0 production in deep inelastic electron-proton scattering at HERA
ANZIVINO, Giuseppina
1995
Abstract
The exclusive production of ϱ0 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 GeV2 for gamma*p centre of mass (c.m.) energies 40 to 130 GeV. The y*p → ϱ0p 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.File in questo prodotto:
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