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The inclusive single and double differential cross-sections for neutral and charged current processes with four-momentum transfer squared É ¾ between ½½¼ and ¿¼ ¼¼¼ Î ¾ and with Bjorken Ü between ¼¼¼¿¾ and ¼ are measured in · Ô collisions. The data were taken with the H1 detector at HERA between 1994 and 1997, and they correspond to an integrated luminosity(More)
Measurements of ep scattering with squared 4–momentum transfer Q 2 up to 35000 GeV 2 are compared with the expectation of the standard deep-inelastic model of lepton–nucleon scattering (DIS). For Q 2 > 15000 GeV 2 , N obs = 12 neutral current candidate events are observed where the expectation is N DIS = 4.71 ± 0.76 events. In the same Q 2 range, N obs = 4(More)
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 W γp is analysed in an extended range with respect to previous measurements of 26 ≤ W γp ≤ 285 GeV. The measured energy dependence is parameterized as σ γp ∝ W δ γp with δ = 0.83 ± 0.07. The differential(More)
The leptoproduction of J/ψ mesons is studied in inelastic reactions for four momentum transfers 2 < Q 2 < 100 GeV 2. The data were taken with the H1 detector at the electron proton collider HERA and correspond to an integrated luminosity of 77 pb −1. Single differential and double differential cross sections are measured with increased precision compared(More)
Jet production is studied in the Breit frame in deep-inelastic positron-proton scattering over a large range of four-momentum transfers 5 < Q 2 < 15 000 GeV 2 and transverse jet energies 7 < E T < 60 GeV. The analysis is based on data corresponding to an integrated lumi-nosity of L int ≃ 33 pb −1 taken in the years 1995–1997 with the H1 detector at HERA at(More)
The elastic electroproduction of mesons is studied at HERA with the H1 detector for a photon virtuality in the range ½ É ¾ ¼ Î ¾ and for a hadronic centre of mass energy in the range ¿¼ Ï ½½¼ GeV. The shape of the () mass distribution in the resonance region is measured as a function of É ¾. The full set of spin density matrix elements is determined, and(More)
Deep–inelastic scattering events with a leading baryon have been detected by the H1 experiment at HERA using a forward proton spectrometer and a forward neutron calorimeter. Semi–inclusive cross sections have been measured in the kinematic region 2 Q 2 50 GeV 2 , 6 10 ?5 x 6 10 ?3 and baryon p T 200 MeV, for events with a final state proton with energy 580(More)
Internal jet structure in dijet production in deep-inelastic scattering is measured with the H1 detector at HERA. Jets with transverse energies E T,Breit > 5 GeV are selected in the Breit frame employing k ⊥ and cone jet algorithms. In the kinematic region of squared momentum transfers 10 < Q 2 120 GeV 2 and x-Bjorken values 2 · 10 −4 x Bj 8 · 10 −3 , jet(More)