14 papers
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…
Quark helicity distributions in the nucleon for up, down, and strange quarks from semi--inclusive deep--inelastic scattering
HERMES Collaboration, A. Airapetian
Polarized deep--inelastic scattering data on longitudinally polarized hydrogen and deuterium targets have been used to determine double spin asymmetries of cross sections. Inclusiv…
Evidence for a narrow |S|=1 baryon state at a mass of 1528 MeV in quasi-real photoproduction
HERMES Collaboration, A. Airapetian
Evidence for a narrow baryon state is found in quasi-real photoproduction on a deuterium target through the decay channel p K^0_S --> p pi^+ pi^-. A peak is observed in the p K^0_S…
Measurement of single-spin azimuthal asymmetries in semi-inclusive electroproduction of pions and kaons on a longitudinally polarised deuterium target
HERMES collaboration, A. Airapetian
Single-spin asymmetries have been measured for semi-inclusive electroproduction of , , and mesons in deep-inelastic scattering off a longitudinally polarised…
Single-spin azimuthal asymmetry in exclusive electroproduction of pi^+ mesons
HERMES Collaboration, A. Airapetian
A single-spin asymmetry in the distribution of exclusively produced pi^+ mesons azimuthally around the virtual photon direction relative to the lepton scattering plane has been mea…
Double-Spin Asymmetry in the Cross Section for Exclusive rho^0 Production in Lepton-Proton Scattering
HERMES Collaboration, A. Airapetian
Evidence for a positive longitudinal double-spin asymmetry <A_1^rho> = 0.24 +-0.11 (stat) +-0.02 (syst) in the cross section for exclusive diffractive rho^0(770) vector meson produ…