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19912026
most citedPlanck 2015 results. XIII. Cosmological parameters

10.6k citations

Showing 1998 · hep-exShow all

13 papers · 2 filters

hep-ex1998★ 92 cited

Measurement of D* Meson Cross Sections at HERA and Determination of the Gluon Density in the Proton using NLO QCD

C. Adloff

With the H1 detector at the ep collider HERA, D* meson production cross sections have been measured in deep inelastic scattering with four-momentum transfers Q^2>2 GeV2 and in phot…

hep-ex1998★ 57 cited

Observation of a Coherence Length Effect in Exclusive Rho^0 Electroproduction

K. Ackerstaff

Exclusive incoherent electroproduction of the rho^0(770) meson from 1H, 2H, 3He, and 14N targets has been studied by the HERMES experiment at squared four-momentum transfer Q**2>0.…

hep-ex1998

Gas electron multiplier: performance and possibilities

M. A. Negodaev, B. N. Lomonosov, S. K. Kotelnikov +5

The gas electron multiplier produced with the polyimide film 100 um thick. The maximum gas gain obtained with gas mixture Ar/CH4(91/9) was 5000. No decrease of gas gain with rates…

hep-ex1998★ 43 cited

Forward Jet and Particle Production at HERA

C. Adloff

Single particles and jets in deeply inelastic scattering at low x are measured with the H1 detector in the region away from the current jet and towards the proton remnant, known as…

hep-ex1998

Tagging High Energy Photons in the H1 Detector at HERA

V. F. Andreev, A. S. Belousov, A. M. Fomenko +9

Measures taken to extend the acceptance of the H1 detector at HERA for photoproduction events are described. These will enable the measurement of electrons scattered in events in t…

hep-ex1998★ 55 cited

Determination of the Deep Inelastic Contribution to the Generalised Gerasimov-Drell-Hearn Integral for the Proton and Neutron

K. Ackerstaff

The virtual photon absorption cross section differences [sigma_1/2-sigma_3/2] for the proton and neutron have been determined from measurements of polarised cross section asymmetri…

hep-ex1998★ 47 cited

Diffractive dijet production at HERA

C. Adloff

Interactions of the type ep -> eXY are studied, where the component X of the hadronic final state contains two jets and is well separated in rapidity from a leading baryonic system…

hep-ex1998★ 235 cited

Measurement of the Proton Spin Structure Function g1p with a Pure Hydrogen Target

A. Airapetian

A measurement of the proton spin structure function g1p(x,Q^2) in deep-inelastic scattering is presented. The data were taken with the 27.6 GeV longitudinally polarised positron be…

hep-ex1998★ 195 cited

The Flavor Asymmetry of the Light Quark Sea from Semi-inclusive Deep-inelastic Scattering

K. Ackerstaff

The flavor asymmetry of the light quark sea of the nucleon is determined in the kinematic range 0.02<x<0.3 and 1 GeV^2<Q^2<10 GeV^2, for the first time from semi-inclusive deep-ine…

hep-ex1998★ 301 cited

The HERMES Spectrometer

K. Ackerstaff

The HERMES experiment is collecting data on inclusive and semi-inclusive deep inelastic scattering of polarised positrons from polarised targets of H, D, and He. These data give in…

hep-ex1998★ 20 cited

Beam-Induced Nuclear Depolarisation in a Gaseous Polarised Hydrogen Target

K. Ackerstaff

Spin-polarised atomic hydrogen is used as a gaseous polarised proton target in high energy and nuclear physics experiments operating with internal beams in storage rings. When such…

hep-ex1998★ 22 cited

Hadron Production in Diffractive Deep-Inelastic Scattering

C. Adloff

Characteristics of hadron production in diffractive deep-inelastic positron-proton scattering are studied using data collected in 1994 by the H1 experiment at HERA. The following d…

hep-ex1998★ 17 cited

Charge Asymmetries for D, D_s and Lambda_c Production in Sigma- - Nucleus Interactions at 340 GeV/c

The WA89 Collaboration, M. I. Adamovich et al

CERN experiment WA89 has studied charmed particles produced by a Sigma^- beam at 340 GeV/c on nuclear targets. Production of particles which have light quarks in common with the be…