Search
Results
-
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 -
Prompt photons in photoproduction at HERA
(2010)The European Physical Journal CThe production of prompt photons is measured in the photoproduction regime of electron–proton scattering at HERA. The analysis is based on a data sample corresponding to a total integrated luminosity of 340 pb−1 collected by the H1 experiment. Cross sections are measured for photons with transverse momentum and pseudorapidity in the range 6<\ensuremathEγT<15 GeV and −1.0<η γ <2.4, respectively. Cross sections for events with an additional ...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 -
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 -
Charged particle production in high Q2 deep-inelastic scattering at HERA
(2007)Physics Letters BJournal Article -
Events with an isolated lepton and missing transverse momentum and measurement of W production at HERA
(2010)Journal of High Energy PhysicsA search for events containing an isolated electron or muon and missing transverse momentum produced in e ± p collisions is performed with the H1 and ZEUS detectors at HERA. The data were taken in the period 1994–2007 and correspond to an integrated luminosity of 0.98 fb−1. The observed event yields are in good overall agreement with the Standard Model prediction, which is dominated by single W production. In the e + p data, at large ...Journal Article -
Diffractive electroproduction of rho and phi mesons at HERA
(2010)Journal of High Energy PhysicsDiffractive electroproduction of ρ and ϕ mesons is measured at HERA with the H1 detector in the elastic and proton dissociative channels. The data correspond to an integrated luminosity of 51 pb−1. About 10500 ρ and 2000 φ events are analysed in the kinematic range of squared photon virtuality 2.5 ≤ Q 2 ≤ 60 GeV2, photon-proton centre of mass energy 35 ≤ W ≤ 180 GeV and squared four-momentum transfer to the proton |t| ≤ 3 GeV2. The total, ...Journal Article -
Multi-leptons with high transverse momentum at HERA
(2009)Journal of High Energy PhysicsJournal Article -
Measurement of the charm and beauty structure functions using the H1 vertex detector at HERA
(2010)The European Physical Journal CInclusive charm and beauty cross sections are measured in e − p and e + p neutral current collisions at HERA in the kinematic region of photon virtuality 5≤Q 2≤2000 GeV2 and Bjorken scaling variable 0.0002≤x≤0.05. The data were collected with the H1 detector in the years 2006 and 2007 corresponding to an integrated luminosity of 189 pb−1. The numbers of charm and beauty events are determined using variables reconstructed by the H1 vertex ...Journal Article -
Multi-lepton production at high transverse momenta in ep collisions at HERA
(2008)Physics Letters BProcesses leading to a final state with at least two high transverse momentum leptons (electrons or muons) are studied using the full e ± p data sample collected by the H1 experiment at HERA. The data correspond to an integrated luminosity of 463 pb -1. Di-lepton and tri-lepton event classes are investigated. Cross sections of the production of e + e - and μ + μ - pairs are derived in a restricted phase space dominated by photon-photon ...Journal Article