8 research outputs found
Proceedings of the 38th International Symposium on Multiparticle Dynamics (ISMD08)
Proceedings of ISMD08Comment: Edited by: J. Bartels, K. Borras, G. Gustafson, H. Jung, K. Kutak, S.
Levonian, and J. Mnic
Review of High Energy Diffraction in Real an Virtual Proton Scattering at HERA
The electron-proton collider HERA at DESY opened the door for the study of
diffraction in real and virtual photon-proton scattering at center-of-mass
energies W up to 250 GeV and for large negative mass squared -Q^2 of the
virtual photon up to Q^2 = 1600 GeV^2. At W = 220 GeV and Q^2 = 4 GeV^2,
diffraction accounts for about 15% of the total virtual photon proton cross
section decreasing to ~5% at Q^2 = 200 GeV^2. An overview of the results
obtained by the experiments H1 and ZEUS on the production of neutral
vectormesons and on inclusive diffraction up to the year 2008 is presented.Comment: 124 pages, 114 figure
Measurement of diffractive production of D*+-(2010) mesons in deep inelastic scattering at HERA
Diffractive production of D*+-(2010) mesons in deep inelastic scattering has
been measured with the ZEUS detector at HERA using an integrated luminosity of
44.3 pb-1. Diffractive charm production is identified by the presence of a
large rapidity gap in the final state of events in which a D*+-(2010) meson is
reconstructed in the decay channel D*+ -> (D0 -> K-pi+) pi+ (+ charge
conjugate). Differential cross sections when compared with theoretical
predictions indicate the importance of gluons in such diffractive interactions.Comment: 19 pages, 4 figures; Submitted to Physics Letters. Comments from
Journal referee incorporated, including one additional referenc