منابع مشابه
Elastic Vector Meson Production at HERA
The H1 and ZEUS Collaborations report new results on elastic VM crosssection and trajectory determination. Elastic VM production appears to be independent of the photon polarization. The presence of non-zero shrinkage in the photoproduction of J/ψ indicates the presence of soft physics. Accumulated data do not accommodate a universal Pomeron trajectory. The steepness of the x dependence of elas...
متن کاملElastic J/ψ production at HERA
In this thesis an analysis of diffractive J/ψ photoproduction and electroproduction in epcollisions is presented. The data were collected with the H1 detector and correspond to an integrated luminosity of 54.79pb−1. The kinematic range covers the region of 40GeV < W < 160GeV and −t < 1.2GeV, where W is the centre-of-mass energy in the photonproton system and −t is the squared four-momentum tran...
متن کاملElastic ρ meson production at HERA
Results on elastic electroproduction of ρ mesons are presented for a photon virtuality in the range 1 < Q < 60 GeV and for a hadronic centre of mass energy in the range 30 < W < 140 GeV. The shape of the (ππ) mass distribution is discussed and measurements of the cross section dependences on Q, W and t (the four-momentum transfer squared to the proton) are presented. The full set of ̺ spin densi...
متن کاملElastic vector meson production and DVCS at HERA
Recent results from the H1 and ZEUS experiments are reviewed. The cross sections of elastic photoand electroproduction of the vector mesons φ and J/ψ are measured as functions of Q2,W and t. The large statistics and the large coverage in t and W allow the determination of the effective Regge exchange trajectories, which are found to be different from the soft pomeron trajectory. Shrinkage is ob...
متن کاملJet Production at HERA
Jet production allows precise tests of perturbative QCD. At the electron-proton collider HERA the production of jets is investigated in inelastic electron (positron) proton scattering over a wide range of photon virtualities Q, from photoproduction (Q ≈ 0GeV) to deep inelastic scattering (DIS). This article presents recent measurements of jet cross sections and jet shapes and their comparison t...
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ژورنال
عنوان ژورنال: Nuclear and Particle Physics Proceedings
سال: 2016
ISSN: 2405-6014
DOI: 10.1016/j.nuclphysbps.2015.09.352