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Exclusive ρ0 production in deep inelastic scattering at HERA

ZEUS Collaboration

PMC Physics A 2007, 1:6  doi:10.1186/1754-0410-1-6

Published: 12 November 2007


Exclusive ρ0 electroproduction at HERA has been studied with the ZEUS detector using 120 pb-1 of integrated luminosity collected during 1996–2000. The analysis was carried out in the kinematic range of photon virtuality 2 <Q2 < 160 GeV2, and γ*p centre-of-mass energy 32 <W < 180 GeV. The results include the Q2 and W dependence of the γ*p ρ0p cross section and the distribution of the squared-four-momentum transfer to the proton. The helicity analysis of the decay-matrix elements of the ρ0 was used to study the ratio of the γ*p cross section for longitudinal and transverse photon as a function of Q2 and W. Finally, an effective Pomeron trajectory was extracted. The results are compared to various theoretical predictions.

PACS Codes: 13.60.Hb, 13.60.Le