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Beam-helicity asymmetry in associated electroproduction of real photons ep → eγπN in the Δ-resonance region

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hermes
Abstract
The beam-helicity asymmetry in associated electroproduction of real photons, ep -> aEuro parts per thousand e gamma pi N , in the Delta(1232)-resonance region is measured using the longitudinally polarized Hera positron beam and an unpolarized hydrogen target. Azimuthal Fourier amplitudes of this asymmetry are extracted separately for two channels, ep -> aEuro parts per thousand e gamma pi(0) p and ep -> aEuro parts per thousand e gamma pi(+) n, from a data set collected with a recoil detector. All asymmetry amplitudes are found to be consistent with zero.
Keywords
QCD, Lepton-Nucleon Scattering, Polarization, Photon production, VIRTUAL COMPTON-SCATTERING, CROSS-SECTIONS, SPIN, HERA, DEPENDENCE, LIMIT

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Citation

Please use this url to cite or link to this publication:

Chicago
Airapetian, A, N Akopov, EC Aschenauer, W Augustyniak, R Avakian, A Avetissian, E Avetisyan, et al. 2014. “Beam-helicity Asymmetry in Associated Electroproduction of Real Photons Ep → eγπN in the Δ-resonance Region.” Journal of High Energy Physics (1).
APA
Airapetian, A., Akopov, N., Aschenauer, E., Augustyniak, W., Avakian, R., Avetissian, A., Avetisyan, E., et al. (2014). Beam-helicity asymmetry in associated electroproduction of real photons ep → eγπN in the Δ-resonance region. JOURNAL OF HIGH ENERGY PHYSICS, (1).
Vancouver
1.
Airapetian A, Akopov N, Aschenauer E, Augustyniak W, Avakian R, Avetissian A, et al. Beam-helicity asymmetry in associated electroproduction of real photons ep → eγπN in the Δ-resonance region. JOURNAL OF HIGH ENERGY PHYSICS. 2014;(1).
MLA
Airapetian, A, N Akopov, EC Aschenauer, et al. “Beam-helicity Asymmetry in Associated Electroproduction of Real Photons Ep → eγπN in the Δ-resonance Region.” JOURNAL OF HIGH ENERGY PHYSICS 1 (2014): n. pag. Print.
@article{4434601,
  abstract     = {The beam-helicity asymmetry in associated electroproduction of real photons, ep -{\textrangle} aEuro parts per thousand e gamma pi N , in the Delta(1232)-resonance region is measured using the longitudinally polarized Hera positron beam and an unpolarized hydrogen target. Azimuthal Fourier amplitudes of this asymmetry are extracted separately for two channels, ep -{\textrangle} aEuro parts per thousand e gamma pi(0) p and ep -{\textrangle} aEuro parts per thousand e gamma pi(+) n, from a data set collected with a recoil detector. All asymmetry amplitudes are found to be consistent with zero.},
  author       = {Airapetian, A and Akopov, N and Aschenauer, EC and Augustyniak, W and Avakian, R and Avetissian, A and Avetisyan, E and Blok, HP and Bottcher, H and Borissov, A and Bowles, J and Brodski, I and Bryzgalov, V and Burns, J and Capitani, GP and Cisbani, E and Ciullo, G and Contalbrigo, M and Dalpiaz, PF and Deconinck, W and De Leo, R and De Sanctis, E and Diefenthaler, M and Di Nezza, P and Duren, M and Ehrenfried, M and Elbakian, G and Ellinghaus, F and Etzelmuller, E and Fabbri, R and Frullani, S and Gapienko, G and Gapienko, V and Garcia, JG and Garibaldi, F and Gavrilov, G and Gharibyan, V and Giordano, F and Gliske, S and Hartig, M and Hasch, D and Holler, Y and Hristova, I and Ivanilov, A and Jackson, HE and Joosten, S and Kaiser, R and Karyan, G and Keri, T and Kinney, E and Kisselev, A and Korotkov, V and Kozlov, V and Kravchenko, P and Krivokhijine, VG and Lagamba, L and Lapikas, L and Lehmann, I and Lenisa, P and Lorenzon, W and Lu, XG and Ma, BQ and Mahon, D and Makins, NCR and Manaenkov, SI and Mao, Y and Marianski, B and Marukyan, H and Miller, CA and Miyachi, Y and Movsisyan, A and Muccifora, V and Murray, M and Mussgiller, A and Naryshkin, Y and Nass, A and Negodaev, M and Nowak, WD and Pappalardo, LL and Perez-Benito, R and Petrosyan, A and Reimer, PE and Reolon, AR and Riedl, C and Rith, K and Rosner, G and Rostomyan, A and Rubin, J and Ryckbosch, Dirk and Salomatin, Y and Schafer, A and Schnell, G and Seitz, B and Shibata, TA and Stahl, M and Statera, M and Steffens, E and Steijger, JJM and Stewart, J and Stinzing, F and Taroian, S and Terkulov, A and Truty, R and Trzcinski, A and Tytgat, Michael and Van Haarlem, Y and Van Hulse, Charlotte and Vikhrov, V and Vilardi, I and Wang, S and Yaschenko, S and Ye, Z and Yen, S and Zagrebelnyy, V and Zihlmann, B and Zupranski, P},
  issn         = {1029-8479},
  journal      = {JOURNAL OF HIGH ENERGY PHYSICS},
  language     = {eng},
  number       = {1},
  pages        = {17},
  title        = {Beam-helicity asymmetry in associated electroproduction of real photons ep {\textrightarrow} e\ensuremath{\gamma}\ensuremath{\pi}N in the \ensuremath{\Delta}-resonance region},
  url          = {http://dx.doi.org/10.1007/JHEP01(2014)077},
  year         = {2014},
}

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