Dissociation of virtual photons in events with a leading proton at HERA
(2004) European Physical Journal C. Particles and Fields — Vol. C38, p. 43-67 (2004)
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- Abstract
- (en) The ZEUS detector has been used to study dissociation of virtual photons in events with a leading proton, gamma^* p -> X p, in e^+p collisions at HERA. The data cover photon virtualities in two ranges, 0.03<Q^2<0.60 GeV^2 and 2<Q^2<100 GeV^2, with M_X>1.5 GeV, where M_X is the mass of the hadronic final state, X. Events were required to have a leading proton, detected in the ZEUS leading proton spectrometer, carrying at least 90% of the incoming proton energy. The cross section is presented as a function of t, the squared four-momentum transfer at the proton vertex, Phi, the azimuthal angle between the positron scattering plane and the proton scattering plane, and Q^2. The data are presented in terms of the diffractive structure function, F_2^D(3). A next-to-leading-order QCD fit to the higher-Q^2 data set and to previously published diffractive charm production data is presented.
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Citations
Chekanov, S., de Favereau de Jeneret, J., Piotrzkowski, K., & et al. (2004). Dissociation of virtual photons in events with a leading proton at HERA. European Physical Journal C. Particles and Fields, C38, 43-67. https://doi.org/10.1140/epjc/s2004-02047-4 (Original work published 2004)