(on behalf of the H1 and ZEUS collaborations) Deep-inelastic ep scattering data, taken with the H1 and ZEUS detectors at HERA, are used to study the means and distributions of the event shape variables thrust, jet broadening, jet mass, C-parameter and two kinds of differential two-jet rate. The data cover a range of the four-momentum transfer Q, taken to be the relevant energy scale, between 7 ...

The Hera of Zeus. Intimate Enemy, Ultimate Spouse (V.) Pirenne-Delforge, (G.) Pironti Pp. xxii + 381, b/w & colour ills. Cambridge: Cambridge University Press, 2022. Cased, £90, US$120. ISBN: 978-1-108-84103-0.

Studies of charm and beauty production in ep collisions with a center-of-mass energy of 318 GeV are reported from the two HERA collaborations, H1 and ZEUS. The analyses make use of both the HERA-I data sample recorded between 1996 and 2000 and a sample from HERA-II, which started in 2003. The cross sections measured by both H1 and ZEUS experiments are compared with next-to-leading order QCD cal...

The semi-analytical approach to the model independent leptonic QED corrections to exclusive ρ0 meson leptoproduction (i.e. electron and muon scattering experiments) is presented. The corrections to ρ0 production at large Q2 as well as to ρ0 photoproduction are studied in details. The numerical results are calculated for two different experimental analyses: NMC (muoproduction at large Q2) and ZE...

In the contribution, the authors applied the Multi-Agent methodology to the partial discharge (PD) online diagnosis for high voltage apparatus, and a PD diagnosis Multi-Agent system for high voltage apparaus was implemented. Based on the investigation of problems existing in partial discharge detection and evaluation, such as preprocessing, features extraction, trend and fingerprint analysis, c...

For the H1 and ZEUS Collaborations Recent results of real and virtual photon structure from the H1 and ZEUS collaborations are discussed. Jet cross-sections in photoproduction processes provide new constraints on the real photon parton densities. Measurements of dijet cross-sections in deep-inelastic scattering show clear evidence for a resolved component to the virtual photon which is suppress...

Despite its theoretical and practical importance, the pion structure is still badly constrained, particularly at low x π and in the sea-quark and gluon sectors. Recently ZEUS have presented data on dijet photoproduction with a leading neutron, which is dominated by slightly off-shell pion exchange and can be used to constrain the pion densities down to x π ≃ 0.01. We compare a recent NLO calcul...

Recent results on jets and the hadronic final state from the HERA collaborations H1 and ZEUS are reviewed.

New preliminary electroweak results from the HERA lepton-proton collider experiments H1 and ZEUS are presented. These include new high Q neutral current cross section measurements, limits on a possible quark radius in the search for contact interactions as well as on quark-Z coupling parameters, extracted in combined electroweak and QCD fits. Furthermore, new charged current cross section measu...