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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…
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 π^\pm and K^\pm mesons. The data were collected by the HERMES experiment at the HE…
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…
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…
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…
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…
Transverse momentum broadening of hadrons produced in semi-inclusive deep-inelastic scattering on nuclei
The HERMES Collaboration, A. Airapetian
The first direct measurement of the dependence on target nuclear mass of the average squared transverse momentum <pt**2> of pi+, pi-, and K+ mesons from deep-inelastic lepton scatt…
Spin Density Matrix Elements in Exclusive rho^0 Electroproduction on 1H and 2H Targets at 27.5 GeV Beam Energy
HERMES Collaboration, A. Airapetian
Spin Density Matrix Elements (SDMEs) describing the angular distribution of exclusive rho^0 electroproduction and decay are determined in the HERMES experiment with 27.6 GeV beam e…
Hadronization in semi-inclusive deep-inelastic scattering on nuclei
The HERMES Collaboration, A. Airapetian
A series of semi-inclusive deep-inelastic scattering measurements on deuterium, helium, neon, krypton, and xenon targets has been performed in order to study hadronization. The dat…
Transverse Polarization of Lambda and Lambda-bar Hyperons in Quasireal Photoproduction
The HERMES Collaboration, A. Airapetian
The HERMES experiment has measured the transverse polarization of Lambda and Lambda-bar hyperons produced inclusively in quasireal photoproduction at a positron beam energy of 27.6…
Beam-Spin Asymmetries in the Azimuthal Distribution of Pion Electroproduction
HERMES Collaboration, A. Airapetian
A measurement of the beam-spin asymmetry in the azimuthal distribution of pions produced in semi-inclusive deep-inelastic scattering off protons is presented. The measurement was p…
Precise determination of the spin structure function of the proton, deuteron and neutron
The HERMES Collaboration, A. Airapetian
Precise measurements of the spin structure functions of the proton and deuteron are presented over the kinematic range and $0…
The Beam--Charge Azimuthal Asymmetry and Deeply Virtual Compton Scattering
The HERMES Collaboration, A. Airapetian
The first observation of an azimuthal cross--section asymmetry with respect to the charge of the incoming lepton beam is reported from a study of hard exclusive electroproduction o…
Double hadron leptoproduction in the nuclear medium
The HERMES Collaboration, A. Airapetian
First measurement of double-hadron production in deep-inelastic scattering has been measured with the HERMES spectrometer at HERA using a 27.6 GeV positron beam with deuterium, nit…
Subleading-twist effects in single-spin asymmetries in semi-inclusive deep-inelastic scattering on a longitudinally polarized hydrogen target
The HERMES Collaboration, A. Airapetian, :
Single-spin asymmetries in the semi-inclusive production of charged pions in deep-inelastic scattering from transversely and longitudinally polarized proton targets are combined to…
First Measurement of the Tensor Structure Function of the Deuteron
The HERMES Collaboration, A. Airapetian
The \Hermes experiment has investigated the tensor spin structure of the deuteron using the 27.6 GeV/c positron beam of \Hera. The use of a tensor polarized deuteron gas target wit…