We discuss the physics of large impact parameter interactions at the LHC: ultraperipheral
collisions (UPCs). The dominant processes in UPCs are photon–nucleon (nucleus) …

This manual describes the Pythia event generator, the most recent version of an evolving
physics tool used to answer fundamental questions in particle physics. The program is most …

HERA, the first electron-proton collider, has been delivering luminosity since 1992. It is the
natural extension of an impressive series of fixed-target lepton-nucleon scattering …

Exclusive production of $\rho^ 0$ and $ J/\psi $ mesons in e^+ p collisions has been studied
with the ZEUS detector in the kinematic range $0.25< Q^ 2< 50 GeV^ 2, 20< W< 167 GeV …

Cross sections for elastic production of J/ψ mesons in photoproduction and
electroproduction are measured in electron proton collisions at HERA using an integrated …

Results on J/ψ production in ep interactions in the H1 experiment at HERA are presented.
The J/ψ mesons are produced by almost real photons (Q2≈ 0) and detected via their …

Cross sections for elastic photoproduction of J/ψ and ϒ mesons are presented. For J/ψ
mesons the dependence on the photon-proton centre-of-mass energy Wγp is analysed in an …

Exclusive production of ρ^0 and J/ψ mesons in e ^+ p collisions has been studied with the
ZEUS detector in the kinematic range 0.25<Q^2<50 GeV ^2, 20<W<167 GeV for the ρ^0 …

We develop the color dipole phenomenology of diffractive photo-and electroproduction γ*
N→ V (V′) N of light vector mesons (V (1 S)= ϕ 0, ω 0, ρ 0) and their radial excitations …

The results of a measurement of the proton structure function F2 (x, Q2) and the virtual
photon-proton cross section are reported for momentum transfers squared Q2 between 0.35 …