Beam-Spin Asymmetries in the Azimuthal Distribution of Pion Electroproduction. (2007)
A. Airapetian, DESY Forschung Hochenergiephysik, Z. Akopov, M. Amarian, A. Andrus, E.C. Aschenauer, ...
Journal article
Tensor polarization of the $\phi$ meson photoproduced at high $t$ (2004)
McCormick, K., Audit, G., Laget, J.M., Guo, L., Weygand, D.P., Stoler, P., ...
Tensor polarization of the $\phi$ meson photoproduced at high $t$ (2004)
McCormick, K., Audit, G., Laget, J.M., Guo, L., Weygand, D.P., Stoler, P., ...
Observation of an exotic baryon with S=+1 in photoproduction from the proton (2004)
Kubarovsky, V., Guo, L., Weygand, D.P., Stoler, P., Niyazov, R.A., Weinstein, L.B., ...
Two nucleon momentum distributions measured in $^3$He $(e,e'pp)n$ (2004)
Niyazov, R.A., Weinstein, L.B., Carman, D.S., Joo, K., Mestayer, M.D., Raue, B.A., ...
Tensor polarization of the $\phi$ meson photoproduced at high $t$ (2004)
McCormick, K., Audit, G., Laget, J.M., Guo, L., Weygand, D.P., Stoler, P., ...
Observation of an exotic baryon with S=+1 in photoproduction from the proton (2004)
Kubarovsky, V., Guo, L., Weygand, D.P., Stoler, P., Niyazov, R.A., Weinstein, L.B., ...
Two nucleon momentum distributions measured in $^3$He $(e,e'pp)n$ (2004)
Niyazov, R.A., Weinstein, L.B., Carman, D.S., Joo, K., Mestayer, M.D., Raue, B.A., ...
Measurement of ep$\rightarrow$e'p$\pi^+\pi^-$and baryon resonance analysis (2003)
Ripani, M., Burkert, V.D., Mokeev, V., Battaglieri, M., De Vita, R., Golovach, E., ...
Photoproduction of $\omega$ meson on the proton at large momentum transfer (2003)
Battaglieri, M., Brunoldi, M., De Vita, R., Laget, J.M., Osiepenko, M., Ripani, M., ...
Measurement of ep$\rightarrow$e'p$\pi^+\pi^-$and baryon resonance analysis (2003)
Ripani, M., Burkert, V.D., Mokeev, V., Battaglieri, M., De Vita, R., Golovach, E., ...
Photoproduction of $\omega$ meson on the proton at large momentum transfer (2003)
Battaglieri, M., Brunoldi, M., De Vita, R., Laget, J.M., Osiepenko, M., Ripani, M., ...
Compton Scattering by the Proton using a Large-Acceptance Arrangement (2001)
Wolf, S., Lisin, V., Kondratiev, R., Massone, A. M., Galler, G., Ahrens, J., ...
Compton scattering by the proton has been measured using the tagged-photon facility at MAMI (Mainz) and the large-acceptance arrangement LARA. The new data are interpreted in terms of dispersion...
Compton Scattering by the Proton (2001)
Galler, G., Lisin, V., Kondratiev, R., Massone, A. M., Wolf, S., Ahrens, J., ...
Compton scattering by the proton has been measured over a wide range covering photon energies 250 MeV < E_\gamma < 800 MeV and photon scattering angles 30^0 < \theta^{lab}_\gamma < 150^0, using the...
Performance of the Electromagnetic Calorimeter of the HERMES Experiment (1998)
H. Avakian, N. Bianchi, G. P. Capitani, E. De Sanctis, P. Di Nezza, A. Fantoni, ...
The performance of the electromagnetic calorimeter of the HERMES experiment is described. The calorimeter consists of 840 radiation resistant F101 lead-glass counters. The response to positrons up to...
Performance of the Electromagnetic Calorimeter of the HERMES Experiment (1998)
H. Avakian, N. Bianchi, G. P. Capitani, E. De Sanctis, P. Di Nezza, A. Fantoni, ...
The performance of the electromagnetic calorimeter of the HERMES experiment is described. The calorimeter consists of 840 radiation resistant F101 lead-glass counters. The response to positrons up to...
M. Amarian, E. Aschenauer, N. Bianchi, A. Borissov, J. Brack, S. Brons, ...
Polarized leptoproduction of charm is an experimentally completely unexplored and theoretically very interesting topic. Of particular interest in this area is the potential sensitivity of the...
LNF-INFN, C.P.13, Via E. Fermi 40 I-00044 Frascati (Roma), Italy (1997)
H. Avakian, N. Bianchi, G. P. Capitani, E. De Sanctis, A. Fantoni, V. Giourdjian, ...
A description of the HERMES electromagnetic calorimeter is given. The measured characteristics on the test beams and after one year data taking are presented. 1 Introduction: the HERMES experiment...
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Andrus, A., ...
Double-spin asymmetries in the cross section of electroproduction of rho /sup 0/ and phi mesons on the proton and deuteron are measured at the HERMES experiment. The photoabsorption asymmetry in...
Double-spin asymmetry in the cross section for exclusive rho0 production in lepton-proton scattering
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Arrington, J., Aschenauer, E.C., ...
Evidence for a positive longitudinal double-spin asymmetry (A/sub 1//sup rho /)=0.24+or-0.11/sub stat/+or-0.02/sub syst/ in the cross section for exclusive diffractive rho /sup 0/(770) vector-meson...
Evidence for quark-hadron duality in the proton spin asymmetry A1
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Aschenauer, E.C., ...
Spin-dependent lepton-nucleon scattering data have been used to investigate the validity of the concept of quark-hadron duality for the spin asymmetry A1. Longitudinally polarized positrons were...
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Andrus, A., ...
Double-spin asymmetries of semiinclusive cross sections for the production of identified pions and kaons have been measured in deep inelastic scattering of polarized positrons on a polarized...
Hadron formation in deep-inelastic positron scattering in a nuclear environment
Airapetian, A., Akopov, N., Akopov, Z., Akushevich, I., Amarian, T., Arrington, J., ...
The influence of the nuclear medium on the production of charged hadrons in semi-inclusive deep-inelastic scattering has been studied by the HERMES experiment at DESY using a 27.5 GeV positron beam....
Measurement of longitudinal spin transfer to Lambda hyperons in deep-inelastic lepton scattering
Airapetian, A., Akopov, N., Amarian, M., Aschenauer, E.C., Avakian, H., Avakian, R., ...
Spin transfer in deep-inelastic Lambda electroproduction has been studied with the HERMES detector using the 27.6 GeV polarized positron beam in the DESY HERA storage ring. For an average fractional...
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Andrus, A., ...
Single-spin asymmetries have been measured for semi-inclusive electroproduction of pi /sup +/, pi /sup -/, pi /sup 0/ and K/sup +/ mesons in deep-inelastic scattering off a longitudinally polarised...
Measurement of the beam-spin azimuthal asymmetry associated with deeply-virtual compton scattering
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Aschenauer, E.C., Avakian, H., ...
The beam spin asymmetry in hard electroproduction of photons was measured in the missing-mass (Mx) range upto 7 GeV. A nonzero asymmetry was observed in the exclusive domain for Mx [less-than or...
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Arrington, J., Aschenauer, E.C., ...
Measurements of the individual multiplicities of pi /sup +/, pi /sup -/ and pi /sup 0/ produced in the deep-inelastic scattering of 27.5 GeV positrons on hydrogen are presented. The average charged...
Q2 dependence of nuclear transparency for exclusive rho0 production
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Andrus, A., ...
Exclusive coherent and incoherent electroproduction of the rho(0) meson from H-1 and N-14 targets has been studied at the HERMES experiment as a function of coherence length (l(c)), corresponding to...
Q2 dependence of nuclear transparency for exclusive rho0 production
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Andrus, A., ...
Exclusive coherent and incoherent electroproduction of the rho(0) meson from H-1 and N-14 targets has been studied at the HERMES experiment as a function of coherence length (l(c)), corresponding to...
Quark fragmentation to pi(+/-), pi(0), K-+/-, p and (p)over-bar in the nuclear environment
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Andrus, A., ...
The influence of the nuclear medium on lepto-production of hadrons was studied in the HERMES experiment at DESY in semi- inclusive deep-inelastic scattering of 27.6 GeV positrons off deuterium,...
Single-spin azimuthal asymmetry in exclusive electroproduction of pi /sup +/ mesons
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Aschenauer, E.C., Avakian, H., ...
A single-spin asymmetry in the distribution of exclusively produced pi /sup +/ mesons azimuthally around the virtual photon direction relative to the lepton scattering plane has been measured for the...
Airapetian, A, Akopov, N., Akopov, Z., Amarian, M, Aschenauer, E. C., Avakian, H., ...
A single-spin asymmetry in the azimuthal distribution of neutral pions relative to the lepton scattering plane has been measured for the first time in deep-inelastic scattering of positrons off...
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Aschenauer, E.C., ...
The Gerasimov-Drell-Hearn (GDH) sum rule connects the anomalous contribution to the magnetic moment of the target nucleus with an energy-weighted integral of the difference of the helicity- dependent...
The HERMES dual-radiator ring imaging Cherenkov detector
Akopov, N., Aschenauer, E.C., Bailey, K., Bernreuther, S., Bianchi, N., Capitani, G.P., ...
The construction and use of a dual radiator Ring Imaging Cherenkov (RICH) detector is described. This instrument was developed for the HERMES experiment at DESY which emphasises measurements of...
De Vita, R., Anghinolfi, M., Burkert, V.D., Dodge, G.E., Minehart, R., Taiuti, M., ...
The double spin asymmetry in the (e) over right arrow(p) over right arrow → e' pi(+) n reaction has been measured for the first time in the resonance region for four-momentum transfer Q(2) =...
Compton scattering by the proton using a large-acceptance arrangement
Wolf, S., Lisin, V., Kondratiev, R., Massone, A.M., Galler, G., Ahrens, J., ...
Compton scattering by the proton has been measured over a wide range covering photon energies 250 MeV lt or approximately=E/sub gamma / lt or approximately=800 MeV and photon scattering angles 30...
Hard exclusive electroproduction of π+π-pairs
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Andrus, A., ...
Hard exclusive electroproduction of pi(+) pi(-) pairs off hydrogen and deuterium targets has been studied by the HERMES experiment at DESY Legendre moments (P-1) and (P-3) of the angular...
Evidence for a narrow |S|=1 baryon state at a mass of 1528 MeV in quasi-real photoproduction
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Andrus, A., ...
Evidence for a narrow baryon state is found in quasi-real photoproduction on a deuterium target through the decay channel pK(S)(0) → ppi(+)pi(-). A peak is observed in the pK(S)(0) invariant mass...
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Andrus, A., ...
Double-spin asymmetries in the cross section of electroproduction of rho /sup 0/ and phi mesons on the proton and deuteron are measured at the HERMES experiment. The photoabsorption asymmetry in...
Double-spin asymmetry in the cross section for exclusive rho0 production in lepton-proton scattering
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Arrington, J., Aschenauer, E.C., ...
Evidence for a positive longitudinal double-spin asymmetry (A/sub 1//sup rho /)=0.24+or-0.11/sub stat/+or-0.02/sub syst/ in the cross section for exclusive diffractive rho /sup 0/(770) vector-meson...
Evidence for quark-hadron duality in the proton spin asymmetry A1
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Aschenauer, E.C., ...
Spin-dependent lepton-nucleon scattering data have been used to investigate the validity of the concept of quark-hadron duality for the spin asymmetry A1. Longitudinally polarized positrons were...
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Andrus, A., ...
Double-spin asymmetries of semiinclusive cross sections for the production of identified pions and kaons have been measured in deep inelastic scattering of polarized positrons on a polarized...
Hadron formation in deep-inelastic positron scattering in a nuclear environment
Airapetian, A., Akopov, N., Akopov, Z., Akushevich, I., Amarian, T., Arrington, J., ...
The influence of the nuclear medium on the production of charged hadrons in semi-inclusive deep-inelastic scattering has been studied by the HERMES experiment at DESY using a 27.5 GeV positron beam....
Measurement of longitudinal spin transfer to Lambda hyperons in deep-inelastic lepton scattering
Airapetian, A., Akopov, N., Amarian, M., Aschenauer, E.C., Avakian, H., Avakian, R., ...
Spin transfer in deep-inelastic Lambda electroproduction has been studied with the HERMES detector using the 27.6 GeV polarized positron beam in the DESY HERA storage ring. For an average fractional...
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Andrus, A., ...
Single-spin asymmetries have been measured for semi-inclusive electroproduction of pi /sup +/, pi /sup -/, pi /sup 0/ and K/sup +/ mesons in deep-inelastic scattering off a longitudinally polarised...
Measurement of the beam-spin azimuthal asymmetry associated with deeply-virtual compton scattering
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Aschenauer, E.C., Avakian, H., ...
The beam spin asymmetry in hard electroproduction of photons was measured in the missing-mass (Mx) range upto 7 GeV. A nonzero asymmetry was observed in the exclusive domain for Mx [less-than or...
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Arrington, J., Aschenauer, E.C., ...
Measurements of the individual multiplicities of pi /sup +/, pi /sup -/ and pi /sup 0/ produced in the deep-inelastic scattering of 27.5 GeV positrons on hydrogen are presented. The average charged...
Q2 dependence of nuclear transparency for exclusive rho0 production
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Andrus, A., ...
Exclusive coherent and incoherent electroproduction of the rho(0) meson from H-1 and N-14 targets has been studied at the HERMES experiment as a function of coherence length (l(c)), corresponding to...
Q2 dependence of nuclear transparency for exclusive rho0 production
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Andrus, A., ...
Exclusive coherent and incoherent electroproduction of the rho(0) meson from H-1 and N-14 targets has been studied at the HERMES experiment as a function of coherence length (l(c)), corresponding to...
Quark fragmentation to pi(+/-), pi(0), K-+/-, p and (p)over-bar in the nuclear environment
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Andrus, A., ...
The influence of the nuclear medium on lepto-production of hadrons was studied in the HERMES experiment at DESY in semi- inclusive deep-inelastic scattering of 27.6 GeV positrons off deuterium,...
Single-spin azimuthal asymmetry in exclusive electroproduction of pi /sup +/ mesons
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Aschenauer, E.C., Avakian, H., ...
A single-spin asymmetry in the distribution of exclusively produced pi /sup +/ mesons azimuthally around the virtual photon direction relative to the lepton scattering plane has been measured for the...