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A precision measurement of the inclusive ep scattering cross section at HERA
(2009)The European Physical Journal CA measurement of the inclusive deep inelastic neutral current e + p scattering cross section is reported in the region of four-momentum transfer squared, 12 GeV2≤Q 2≤150 GeV2, and Bjorken x, 2×10−4≤x≤0.1. The results are based on data collected by the H1 Collaboration at the ep collider HERA at positron and proton beam energies of E e =27.6 GeV and E p =920 GeV, respectively. The data are combined with previously published data, taken at ...Journal Article -
Deeply virtual Compton scattering and its beam charge asymmetry in e±p collisions at HERA
(2009)Physics Letters BA measurement of elastic deeply virtual Compton scattering γ * p → γ p using e + p and e - p collision data recorded with the H1 detector at HERA is presented. The analysed data sample corresponds to an integrated luminosity of 306 pb -1, almost equally shared between both beam charges. The cross section is measured as a function of the virtuality Q 2 of the exchanged photon and the centre-of-mass energy W of the γ * p system in the ...Journal Article -
Events with isolated leptons and missing transverse momentum and measurement of W production at HERA
(2009)The European Physical Journal CEvents with high energy isolated electrons, muons or tau leptons and missing transverse momentum are studied using the full e ± p data sample collected by the H1 experiment at HERA, corresponding to an integrated luminosity of 474 pb−1. Within the Standard Model, events with isolated leptons and missing transverse momentum mainly originate from the production of single W bosons. The total single W boson production cross section is measured ...Journal Article -
Observation of the hadronic final state charge asymmetry in high Q2 deep-inelastic scattering at HERA
(2009)Physics Letters BA first measurement is presented of the charge asymmetry in the hadronic final state from the hard interaction in deep-inelastic ep neutral current scattering at HERA. The measurement is performed in the range of negative squared four momentum transfer 100 < Q 2 < 8000 GeV 2. The difference between the event normalised distributions of the scaled momentum, x p, for positively and negatively charged particles, measured in the current region ...Journal Article -
Measurement of the inclusive ep scattering cross section at low Q (2) and x at HERA
(2009)The European Physical Journal CA measurement of the inclusive ep scattering cross section is presented in the region of low momentum transfers, 0.2 GeV2 ≤Q 2≤12 GeV2, and low Bjorken x, 5⋅10−6≤x≤0.02. The result is based on two data sets collected in dedicated runs by the H1 Collaboration at HERA at beam energies of 27.6 GeV and 920 GeV for positrons and protons, respectively. A combination with data previously published by H1 leads to a cross section measurement of a ...Journal Article -
Multi-leptons with high transverse momentum at HERA
(2009)Journal of High Energy PhysicsJournal Article -
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Strangeness production at low Q2 in deep-inelastic ep scattering at HERA
(2009)The European Physical Journal CThe production of neutral strange hadrons is investigated using deep-inelastic scattering events measured with the H1 detector at HERA. The measurements are made in the phase space defined by the negative four-momentum transfer squared of the photon 2<Q 2<100 GeV2 and the inelasticity 0.1<y<0.6. The K s 0 and Λ(Λ¯) production cross sections and their ratios are determined. K s 0 production is compared to the production of charged particles ...Journal Article -
A general search for new phenomena at HERA
(2009)Physics Letters BA model-independent search for deviations from the Standard Model prediction is performed using the full e±p data sample collected by the H1 experiment at HERA. All event topologies involving isolated electrons, photons, muons, neutrinos and jets with transverse momenta above 20 GeV are investigated in a single analysis. Events are assigned to exclusive classes according to their final state. A dedicated algorithm is used to search for ...Journal Article