Exclusive ρ0 production in deep inelastic scattering at HERA

✍ Scribed by S. Kananov

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 276 KB
• Volume: 184
• Category: Article
• ISSN: 0920-5632
• DOI: 10.1016/j.nuclphysbps.2008.09.175

✦ Synopsis

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 , W and t. Finally, an effective Pomeron trajectory was extracted. * Supported by the German-Israeli Foudation and by the Israeli Ministry of Science 2000, corresponding to an integrated luminosity of about 120 pb -1 .