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Research article Open Access Exclusive ρ 0 production in deep inelastic scattering at HERA ZEUS Collaboration

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Abstract

Exclusive ρ 0 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 <Q 2 < 160 GeV 2, and γ*p centre-of-mass energy 32 <W < 180 GeV. The results include the Q 2 and W dependence of the γ*p → ρ 0 p cross section and the distribution of the squared-four-momentum transfer to the proton. The helicity analysis of the decay-matrix elements of the ρ 0 was used to study the ratio of the γ*p cross section for longitudinal and transverse photon as a function of Q 2 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

Year: 2011
OAI identifier: oai:CiteSeerX.psu:10.1.1.184.8222
Provided by: CiteSeerX
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