556 citations · 3k across the 36 of their papers we have counts for
37 papers
Pentaquark search at HERMES
The HERMES Collaboration, N. Akopov, Z. Akopov +103
The earlier search at HERMES for narrow baryon states excited in quasi-real photoproduction, decaying through the channel , has been extended with improv…
Spin density matrix elements in exclusive electroproduction on H and H targets at 27.5 GeV beam energy
The HERMES Collaboration, A. Airapetian, N. Akopov +97
Exclusive electroproduction of mesons on unpolarized hydrogen and deuterium targets is studied in the kinematic region of Q>1.0 GeV, 3.0 GeV < W < 6.3 GeV, and -t'< 0.2…
Transverse polarization of hyperons from quasireal photoproduction on nuclei
The HERMES Collaboration, A. Airapetian, N. Akopov +134
The transverse polarization of hyperons was measured in inclusive quasireal photoproduction for various target nuclei ranging from hydrogen to xenon. The data were obtained by…
Reevaluation of the parton distribution of strange quarks in the nucleon
The HERMES Collaboration, A. Airapetian, N. Akopov +111
An earlier extraction from the HERMES experiment of the polarization-averaged parton distribution of strange quarks in the nucleon has been reevaluated using final data on the mult…
Transverse target single-spin asymmetry in inclusive electroproduction of charged pions and kaons
The HERMES Collaboration, A. Airapetian, N. Akopov +129
Single-spin asymmetries were investigated in inclusive electroproduction of charged pions and kaons from transversely polarized protons at the HERMES experiment. The asymmetries we…
Beam-helicity asymmetry in associated electroproduction of real photons in the -resonance region
The HERMES Collaboration, A. Airapetian, N. Akopov +114
The beam-helicity asymmetry in associated electroproduction of real photons, , in the (1232)-resonance region is measured using the longitudinally polarized HERA pos…
The HERMES Recoil Detector
A. Airapetian, E. C. Aschenauer, S. Belostotski +80
For the final running period of HERA, a recoil detector was installed at the HERMES experiment to improve measurements of hard exclusive processes in charged-lepton nucleon scatter…
Beam-helicity asymmetry arising from deeply virtual Compton scattering measured with kinematically complete event reconstruction
The HERMES Collaboration, A. Airapetian, N. Akopov +133
The beam-helicity asymmetry in exclusive electroproduction of real photons by the longitudinally polarized HERA positron beam scattering off an unpolarized hydrogen target is measu…
Azimuthal distributions of charged hadrons, pions, and kaons produced in deep-inelastic scattering off unpolarized protons and deuterons
HERMES Collaboration, A. Airapetian, N. Akopov +125
The azimuthal cosϕ and cos2ϕ modulations of the distribution of hadrons produced in unpolarized semi-inclusive deep-inelastic scattering of electrons and positrons off hydrogen and…
Beam-helicity and beam-charge asymmetries associated with deeply virtual Compton scattering on the unpolarised proton
The HERMES Collaboration, A. Airapetian, N. Akopov +124
Beam-helicity and beam-charge asymmetries in the hard exclusive leptoproduction of real photons from an unpolarised hydrogen target by a 27.6 GeV lepton beam are extracted from the…
Measurement of the virtual-photon asymmetry A2 and the spin-structure function g2 of the proton
The HERMES Collaboration, A. Airapetian, N. Akopov +132
A measurement of the virtual-photon asymmetry A_2(x,Q^2) and of the spin-structure function g_2(x,Q^2) of the proton are presented for the kinematic range 0.004 < x < 0.9 and 0.18…
Multidimensional Study of Hadronization in Nuclei
HERMES Collaboration, A. Airapetian, N. Akopov +137
Hadron multiplicities in semi-inclusive deep-inelastic scattering were measured on neon, krypton and xenon targets relative to deuterium at an electron(positron)-beam energy of 27.…
Measurement of double-spin asymmetries associated with deeply virtual Compton scattering on a transversely polarized hydrogen target
The HERMES Collaboration, A. Airapetian, N. Akopov +128
Double-spin asymmetries in exclusive electroproduction of real photons from a transversely polarized hydrogen target are measured with respect to the product of target polarization…
Inclusive Measurements of Inelastic Electron and Positron Scattering from Unpolarized Hydrogen and Deuterium Targets
The HERMES Collaboration, A. Airapetian, N. Akopov +140
Results of inclusive measurements of inelastic electron and positron scattering from unpolarized protons and deuterons at the HERMES experiment are presented. The structure functio…
Measurement of azimuthal asymmetries associated with deeply virtual Compton scattering on a longitudinally polarized deuterium target
The HERMES Collaboration, A. Airapetian, N. Akopov +144
Azimuthal asymmetries in exclusive electroproduction of a real photon from a longitudinally polarized deuterium target are measured with respect to target polarization alone and wi…
Effects of transversity in deep-inelastic scattering by polarized protons
HERMES collaboration, A. Airapetian, N. Akopov +142
Single-spin asymmetries for pions and charged kaons are measured in semi-inclusive deep-inelastic scattering of positrons and electrons off a transversely nuclear-polarized hydroge…
The GlueX Central Drift Chamber: Design and Performance
Y. Van Haarlem, C. A. Meyer, F. Barbosa +8
Tests and studies concerning the design and performance of the GlueX Central Drift Chamber (CDC) are presented. A full-scale prototype was built to test and steer the mechanical an…
The Status of Exotic-quantum-number Mesons
C. A. Meyer, Y. Van Haarlem
The search for mesons with non-quark-antiquark (exotic) quantum numbers has gone on for nearly thirty years. There currently is experimental evidence of three isospin one states, t…
Exclusive Leptoproduction of Real Photons on a Longitudinally Polarised Hydrogen Target
The HERMES Collaboration, A. Airapetian, N. Akopov +147
Polarisation asymmetries are measured for the hard exclusive leptoproduction of real photons from a longitudinally polarised hydrogen target. These asymmetries arise from the deepl…
Leading-Order Determination of the Gluon Polarization from high- Hadron Electroproduction
The HERMES Collaboration, A. Airapetian
Longitudinal double-spin asymmetries of charged hadrons with high transverse momentum have been measured in electroproduction using the \hermes\ detector at \hera. Processes…
Nuclear-mass dependence of azimuthal beam-helicity and beam-charge asymmetries in deeply virtual Compton scattering
The HERMES collaboration, A. Airapetian
The nuclear-mass dependence of azimuthal cross section asymmetries with respect to charge and longitudinal polarization of the lepton beam is studiedfor hard exclusive electroprodu…
Measurement of azimuthal asymmetries associated with deeply virtual Compton scattering on an unpolarized deuterium target
The HERMES Collaboration, A. Airapetian
Azimuthal asymmetries in exclusive electroproduction of a real photon from an unpolarized deuterium target are measured with respect to beam helicity and charge. They appear in the…
Single-spin azimuthal asymmetry in exclusive electroproduction of pi+ mesons on transversely polarized protons
HERMES Collaboration
Exclusive electroproduction of pi+ mesons was studied by scattering 27.6 GeV positrons or electrons off a transversely polarized hydrogen target. The single-spin azimuthal asymmetr…
Search for a Two-Photon Exchange Contribution to Inclusive Deep-Inelastic Scattering
The HERMES Collaboration, A. Airapetian
The transverse-target single-spin asymmetry for inclusive deep-inelastic scattering with effectively unpolarized electron and positron beams off a transversely polarized hydrogen t…