Publications (31)
Ratios of helicity amplitudes for exclusive electroproduction on transversely polarized protons
The HERMES Collaboration, A. Airapetian, N. Akopov +74
Exclusive -meson electroproduction is studied by the HERMES experiment, using the 27.6 GeV longitudinally polarized electron/positron beam of HERA and a transversely polarize…
X-ray-induced disordering of the dimerization pattern and apparent low-temperature enhancement of lattice symmetry in spinel CuIrS
H. Ishibashi, T. Y. Koo, Y. S. Hor +5
At low temperatures, spinel CuIrS is a charge-ordered spin-dimerized insulator with triclinic lattice symmetry. We find that x-rays induce a structural transition in which…
Transverse-target-spin asymmetry in exclusive -meson electroproduction
The HERMES Collaboration, A. Airapetian, N. Akopov +93
Hard exclusive electroproduction of mesons is studied with the HERMES spectrometer at the DESY laboratory by scattering 27.6 GeV positron and electron beams off a transversely…
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 impr…
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…
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…
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…
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…
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…
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.…
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…
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 J/psi production in pp collisions at sqrt(s) = 2.76 TeV
ALICE Collaboration, B. Abelev, J. Adam +966
The ALICE Collaboration has measured inclusive J/psi production in pp collisions at a center of mass energy sqrt(s)=2.76 TeV at the LHC. The results presented in this Letter refer…
Common features of nanoscale structural correlations in magnetoresistive manganites with ferromagnetic low-temperature state
V. Kiryukhin, T. Y. Koo, A. Borissov +5
We report x-ray scattering studies of nanoscale structural correlations in NdSrMnO and La(Ca,Sr)MnO, =0.2--0.5. We find that the correlated regio…
Ratios of Helicity Amplitudes for Exclusive rho-0 Electroproduction
The HERMES Collaboration, A. Airapetian, N. Akopov +135
Exclusive rho^0-meson electroproduction is studied in the HERMES experiment, using a 27.6 GeV longitudinally polarized electron/positron beam and unpolarized hydrogen and deuterium…
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 cosÏ and cos2Ï modulations of the distribution of hadrons produced in unpolarized semi-inclusive deep-inelastic scattering of electrons and positrons off hydrogen a…
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…
Multiplicities of charged pions and kaons from semi-inclusive deep-inelastic scattering by the proton and the deuteron
HERMES Collaboration, A. Airapetian, N. Akopov +135
Multiplicities in semi-inclusive deep-inelastic scattering are presented for each charge state of Ï^\pm and K^\pm mesons. The data were collected by the HERMES experiment at the H…
Longitudinal double-spin asymmetries in semi-inclusive deep-inelastic scattering of electrons and positrons by protons and deuterons
HERMES Collaboration, A. Airapetian, N. Akopov +96
A comprehensive collection of results on longitudinal double-spin asymmetries is presented for charged pions and kaons produced in semi-inclusive deep-inelastic scattering of elect…
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.…
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…
Future physics opportunities for high-density QCD at the LHC with heavy-ion and proton beams
Z. Citron, A. Dainese, J. F. Grosse-Oetringhaus +182
The future opportunities for high-density QCD studies with ion and proton beams at the LHC are presented. Four major scientific goals are identified: the characterisation of the ma…
Bose-Einstein correlations in hadron-pairs from lepto-production on nuclei ranging from hydrogen to xenon
HERMES Collaboration, A. Airapetian, N. Akopov +116
Bose-Einstein correlations of like-sign charged hadrons produced in deep-inelastic electron and positron scattering are studied in the HERMES experiment using nuclear targets of $^…
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…
Uncorrelated and correlated nanoscale lattice distortions in the paramagnetic phase of magnetoresistive manganites
V. Kiryukhin, A. Borissov, J. S. Ahn +3
Neutron scattering measurements on a magnetoresistive manganite La(CaSr)MnO show that uncorrelated dynamic polaronic lattice distortions are…
The Longitudinal Polarimeter at HERA
M. Beckmann, A. Borissov, S. Brauksiepe +12
The design, construction and operation of a Compton back-scattering laser polarimeter at the HERA storage ring at DESY are described. The device measures the longitudinal polarizat…
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…
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…
Spin Density Matrix Elements from diffractive meson production at HERMES
HERMES Collaboration, W. Augustyniak, A. Borissov +1
Exclusive production of mesons on hydrogen and deuterium targets is studied in the HERMES kinematic region GeV and GeV. Spin density matrix…
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…
Intrinsic charge transport on the surface of organic semiconductors
V. Podzorov, E. Menard, A. Borissov +3
The novel technique based on air-gap transistor stamps enabled realization of the intrinsic (not dominated by static disorder) transport of the electric-field-induced charge carrie…