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A search for excited electron (e *) production is described in which the electroweak decays e * → eγ , e * → eZ and e * → νW are considered. The data used correspond to an integrated luminosity of 120 pb −1 taken in e ± p collisions from 1994 to 2000 with the H1 detector at HERA at centre-of-mass energies of 300 and 318 GeV. No evidence for a signal is(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)
  • C. Adloff, V. Andreev, +160 authors H. Krehbiel
  • 1999
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)
A new measurement of the proton structure function F 2 (x, Q 2) is reported for momentum transfers squared Q 2 between 1.5 GeV 2 and 5000 GeV 2 and for Bjorken x between 3 · 10 −5 and 0.32 using data collected by the HERA experiment H1 in 1994. The data represent an increase in statistics by a factor of ten with respect to the analysis of the 1993 data.(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)
Deep-inelastic ep scattering data taken with the H1 detector at HERA and corresponding to an integrated luminosity of 106 pb −1 are used to study the differential distributions of event shape variables. These include thrust, jet broadening, jet mass and the C-parameter. The four-momentum transfer Q is taken to be the relevant energy scale and ranges between(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)
The inclusive e + p single and double differential cross sections for neutral and charged current processes are measured with the H1 detector at HERA. The data were taken in 1999 and 2000 at a centre-of-mass energy of √ s = 319 GeV and correspond to an integrated luminosity of 65.2 pb −1. The cross sections are measured in the range of four-momentum(More)
Results on J== production in ep interactions in the H1 experiment at HERA are presented. The J== mesons are produced by almost real photons (Q 2 0) and detected via their leptonic decays. The data have been taken in 1994 and correspond to an integrated luminosity of 2:7 pb ?1. The p cross section for elastic J== production is observed to increase strongly(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)