Hadronic Final States and Diffraction at HERA

Details Hadronic Final States and Diffraction at HERA Hadronic Final States and Diffraction at HERA

2011-07-11

arxiv.org/abs/1107.2066v1

Physics

High Energy Physics

High Energy Physics - Experiment

Moriond QCD 2011 proceeding paper, 5 pages, 6 figures

Scientific paper

Recent results from the ep (electron-proton) collider HERA are presented. Jet production and diffraction type reactions allow tests of predictions of Quantum Chromodynamics (QCD). Jet measurements are used to improve the combined H1-ZEUS parton density fits by adding an additional constraint on the gluon distribution in the proton and, at the same time, providing information on strong coupling constant. Measurements of inclusive diffraction and diffractive dijet data are discussed in the context of factorisation in diffraction. Diffractive Upsilon(1S) production was studied to extract the t-slope of the process, which was found to be consistent with the other exclusive vector meson data and can be interpreted in terms of the gluonic radius of the proton.

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