A. Airapetian, DESY Forschung Hochenergiephysik, N. Akopov, Z. Akopov, M. Amarian, E.C. Aschenauer, ...
Internal report | Preprint
A. Airapetian, DESY Forschung Hochenergiephysik, N. Akopov, Z. Akopov, M. Amarian, E.C. Aschenauer, ...
Internal report | Preprint
^3He spin-dependent cross sections and sum rules (2008)
Slifer, K., Amarian, M., Auerbach, L., Averett, T., Berthot, J., Bertin, P., ...
We present a measurement of the spin-dependent cross sections for the ^3He(e,e) X reaction in the quasielastic and resonance regions at a four-momentum transfer 0:1 ≤ Q^2 ≤ 0:9 GeV^2. The...
3He Spin-Dependent Cross Sections and Sum Rules (2008)
Amarian, M., Auerbach, L., Averett, T., Berthot, J., Bertin, P., ...
We present a measurement of the spin-dependent cross sections for the \vec{^3He}(\vec{e},e')X} reaction in the quasielastic and resonance regions at four-momentum transfer 0.1 < Q^2< 0.9 GeV^2. The...
Performance of the Electromagnetic Calorimeter of the HERMES Experiment (2007)
Avakian Bianchi, 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...
Quark-Hadron Duality in Spin Structure Functions $g_1^p$ and $g_1^d$ (2007)
Bosted, P.E., V. Dharmawardane, K., E. Dodge, G., A. Forest, T., E. Kuhn, S., Prok, Y., ...
New measurements of the spin structure functions of the proton and deuteron g1p(x,Q2) and g1d(x,Q2) in the nucleon resonance region are compared with extrapolations of target-mass-corrected...
Scaling tests of the cross section for deeply virtual compton scattering (2007)
Munoz Camacho, C., Camsonne, A., Mazouz, M., Ferdi, C., Gavalian, G., Kuchina, E., ...
We present the first measurements of \vec{e}p->epg cross section in the deep virtual Compton scattering (DVCS) regime and the valence quark region (x_{Bj}=0.36). From JLab E00-110, we extract the...
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
Transverse polarization of Lambda and (Lambda)over-bar hyperons in quasireal photoproduction (2007)
AIRAPETIAN, A, AKOPOV, N, AKOPOV, Z, AMARIAN, M, AMMOSOV, VV, ANDRUS, A, ...
Ungaro, M., Stoler, P., Aznauryan, I., Burkert, V. D., Joo, K., Smith, L. C., ...
We report a new measurement of the exclusive electroproduction reaction gamma* p -> pi0 p to explore the evolution from soft non-perturbative physics to hard processes via the Q2 dependence of the...
Roche, J., Hyde-Wright, C. E., Michel, B., Camacho, C. Munoz, Gavalian, G., Amarian, M., ...
We propose precision measurements of the helicity-dependent and helicity independent cross sections for the ep->epg reaction in Deeply Virtual Compton Scattering (DVCS) kinematics. DVCS scaling is...
Roche, J., Hyde-Wright, C. E., Michel, B., Camacho, C. Munoz, Gavalian, G., Amarian, M., ...
We propose precision measurements of the helicity-dependent and helicity independent cross sections for the ep->epg reaction in Deeply Virtual Compton Scattering (DVCS) kinematics. DVCS scaling is...
Ungaro, M., Stoler, P., Aznauryan, I., Burkert, V. D., Joo, K., Smith, L. C., ...
We report a new measurement of the exclusive electroproduction reaction gamma* p -> pi0 p to explore the evolution from soft non-perturbative physics to hard processes via the Q2 dependence of the...
Double-hadron leptoproduction in the nuclear medium (2006)
AIRAPETIAN, A, AKOPOV, N, AKOPOV, Z, AMARIAN, M, ANDRUS, A, ASCHENAUER, EC, ...
Measurement of the generalized forward spin polarizabilities of the neutron (2005)
Amarian, M., Auerbach, L., Averett, T., Berthot, J., Bertin, P., Bertozzi, B., ...
The HERMES polarized hydrogen and deuterium gas target in the HERA electron storage ring (2005)
AIRAPETIAN, A, AKOPOV, N, AKOPOV, Z, AMARIAN, M, ANDRUS, A, ASCHENAUER, EC, ...
Measurement of the tensor structure function b(1) of the deuteron (2005)
AIRAPETIAN, A, AKOPOV, N, AKOPOV, Z, AMARIAN, M, AMMOSOV, VV, ANDRUS, A, ...
$Q^2$ evolution of the neutron spin structure moments using a $^3He$ target (2004)
Amarian, M., Auerbach, L., Averett, T., Berthot, J., Bertin, P., Bertozzi, B., ...
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...
Measurement of the generalized forward spin polarizabilities of the neutron (2004)
Amarian, M., Auerbach, L., Averett, T., Berthot, J., Bertin, P., Bertozzi, B., ...
$Q^2$ evolution of the neutron spin structure moments using a $^3He$ target (2004)
Amarian, M., Auerbach, L., Averett, T., Berthot, J., Bertin, P., Bertozzi, B., ...
Measurement of the generalized forward spin polarizabilities of the neutron (2004)
Amarian, M., Auerbach, L., Averett, T., Berthot, J., Bertin, P., Bertozzi, B., ...
$Q^2$ evolution of the neutron spin structure moments using a $^3He$ target (2004)
Amarian, M., Auerbach, L., Averett, T., Berthot, J., Bertin, P., Bertozzi, B., ...
Hard exclusive electroproduction of π+π-pairs (2004)
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 (2004)
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...
Nuclear polarization of molecular hydrogen recombined on a non-metallic surface (2004)
AIRAPETIAN, A, AKOPOV, N, AKOPOV, Z, AMARIAN, M, AMMOSOV, VV, ANDRUS, A, ...
Hard exclusive electroproduction of pi(+)pi(-) pairs (2004)
AIRAPETIAN, A, AKOPOV, N, AKOPOV, Z, AMARIAN, M, AMMOSOV, VV, ANDRUS, A, ...
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...
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...
Evidence for quark-hadron duality in the proton spin asymmetry A1 (2003)
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...
Q2 dependence of nuclear transparency for exclusive rho0 production (2003)
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...
The Time-of-Flight Technique for the HERMES Experiment (2003)
Airapetian, HERMES Collaboration: A., Akopov, N., Amarian, M., Avakian, H., Avetissian, A., Avetisyan, E., ...
This paper describes the use of the time-of-flight (TOF) technique as a particle identification method for the HERMES experiment. The time-of-flight is measured by two 1x4 m^2 scintillation...
Q2 dependence of nuclear transparency for exclusive rho0 production (2003)
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 (2003)
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,...
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...
Quark fragmentation to pi(+/-), pi(0), K-+/-, p and (p)over-bar in the nuclear environment (2003)
AIRAPETIAN, A, AKOPOV, N, AKOPOV, Z, AMARIAN, M, AMMOSOV, VV, ANDRUS, A, ...
We present data on the inclusive scattering of polarized electrons from a polarized He-3 target at energies from 0.862 to 5.06 GeV, obtained at a scattering angle of 15.5 degrees. Our data include...
Single-spin azimuthal asymmetry in exclusive electroproduction of pi /sup +/ mesons (2002)
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...
Polarization measurements in neutral pion photoproduction (2002)
Wijesooriya, K., Afanasev, A., Amarian, M., Aniol, K., Becher, S., Benslama, K., ...
Polarization measurements in neutral pion photoproduction (2002)
Wijesooriya, K., Afanasev, A., Amarian, M., Aniol, K., Becher, S., Benslama, K., ...
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, 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., 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...
Polarization measurements in high-energy deuteron photodisintegration (2001)
Wijesooriya, K., Afanasev, A., Amarian, M., Aniol, K., Becher, S., Benslama, K., ...
Polarization measurements in high-energy deuteron photodisintegration (2001)
Wijesooriya, K., Afanasev, A., Amarian, M., Aniol, K., Becher, S., Benslama, K., ...
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...
Polarization Measurements in High-Energy Deuteron Photodisintegration (2001)
Afanasev, A., Amarian, M., Aniol, K., Becher, S., Wijesooriya, K.
Deeply virtual Compton scattering at 6 GeV (2000)
Chen, J P, Chudakov, E A, De Jager, C W, Gómez, J, Hansen, O, Le Rose, J J, ...
Deeply Virtual Compton Scattering at 6 GeV (2000)
Chen, J.P., Chudakov, E., De Jager, C., Gomez, J., Hansen, O., LeRose, J., ...
Deeply Virtual Compton Scattering at 6 GeV (2000)
Chen, J.P., Chudakov, E., De Jager, C., Gomez, J., Hansen, O., LeRose, J., ...
Deeply Virtual Compton Scattering at 6 GeV (2000)
Chen, J.P., Chudakov, E., De Jager, C., Gomez, J., Hansen, O., LeRose, J., ...
Deeply Virtual Compton Scattering at 6 GeV (2000)
Chen, J.P., Chudakov, E., De Jager, C., Gomez, J., Hansen, O., LeRose, J., ...
Deeply Virtual Compton Scattering at 6 GeV (2000)
Chen, J.P., Chudakov, E., De Jager, C., Gomez, J., Hansen, O., LeRose, J., ...
Exclusive Leptoproduction of (2000)
Mesons From Hydrogen, A. Airapetian, N. Akopov, I. Akushevich, M. Amarian, J. Arrington, ...
. Measurements of the cross section for exclusive virtual-photoproduction of ae 0 mesons from hydrogen are reported. The data were collected by the HERMES experiment using 27.5 GeV positrons incident...
Measurement of Angular Distributions and (2000)
In Diractive Electroproduction, A. Airapetian, N. Akopov, M. Amarian, H. Avakian
. Production and decay angular distributions were extracted from measurements of exclusive electroproduction of the # 0 (770) meson over a range in the virtual photon negative four-momentum squared...
Observation of a coherence length effect in exclusive ρ(0) electroproduction (1999)
Ackerstaff, K., Airapetian, A., Akopov, N., Akushevich, I., Amarian, M., Aschenauer, E. C., ...
Exclusive incoherent electroproduction of the ρ0(770) meson from 1H, 2H, 3He, and 14N targets has been studied by the HERMES experiment at squared four-momentum transfer Q^2>0.4 GeV^2 and positron...
Beam-induced nuclear depolarization in a gaseous polarized-hydrogen target (1999)
Ackerstaff, K., Airapetian, A., Akopov, N., Amarian, M., Aschenauer, E. C., Avakian, H., ...
Spin-polarized atomic hydrogen is used as a gaseous polarized-proton target in high-energy and nuclear-physics experiments operating with internal beams in storage rings. When such beams are intense...
Flavor asymmetry of the light quark sea from semi-inclusive deep-inelastic scattering (1998)
Ackerstaff, K., Airapetian, A., Akopov, N., Akushevich, I., Amarian, M., Ashenauer, E. C., ...
The flavor asymmetry of the light quark sea of the nucleon is determined in the kinematic range 0.02 < x < 0.3 and 1 < Q(2) < 10 GeV2 for the first time from semi-inclusive deep-inelastic scattering....
The HERMES Spectrometer (1998)
Ackerstaff Airapetian Akopov, K. Ackerstaff, A. Airapetian, N. Akopov, M. Amarian, V. Andreev, ...
The HERMES experiment is collecting data on inclusive and semi-inclusive deep inelastic scattering of polarised positrons from polarised targets of H, D, and 3 He. These data give information on the...
Amarian Aschenauer Bianchi, M. Amarian, E. Aschenauer, N. Bianchi, A. Borissov, J. Brack, ...
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...
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...
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...
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...
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...
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...