EPJ Web Conf.
Volume 141, 2017XLVI International Symposium on Multiparticle Dynamics (ISMD 2016)
|Number of page(s)||6|
|Section||Forward physics and diffraction|
|Published online||12 April 2017|
Recent results on diffractive and forward physics at HERA
Rokkodai-cho 1-1, Nada, Kobe, 657-8501 Japan
a e-mail: email@example.com
Published online: 12 April 2017
Recent studies on diffractive processes in ep scattering at HERA are reviewed. Heavy quark production in diffractive processes was studied by tagging a D* meson in diffractive DIS events. The cross section for events with a prompt photon in the final state was also measured. The data are well reproduced by models using diffractive parton densities determined from inclusive diffractive DIS cross sections. Two studies were also made on exclusive vector meson production. The cross-section ratio σψ((2S))/σ(ψ(1S)), which reflects the difference in transverse shape of the charmonium wave functions, are compared to various models. Moreover, the diffractive ρ0 photoproduction with a forward neutron, which has two vertices with small-pT recoil, were measured to study factorisation properties. The data show some indication of re-scattering.
© The Authors, published by EDP Sciences, 2017
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