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Exclusive leptoproduction of real photons on a longitudinally polarised hydrogen target

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Abstract
Polarisation asymmetries are measured for the hard exclusive leptoproduction of real photons from a longitudinally polarised hydrogen target. These asymmetries arise from the deeply virtual Compton scattering and Bethe-Heitler processes. From the data are extracted two asymmetries in the azimuthal distribution of produced real photons about the direction of the exchanged virtual photon: A(UL) with respect to the target polarisation and A(LL) with respect to the product of the beam and target polarisations. Results for both asymmetries are compared to the predictions from a generalised parton distribution model. The sin phi and cos(0 phi) amplitudes observed respectively for the A(UL) and A(LL) asymmetries are compatible with the sizeable predictions from the model. Unexpectedly, a sin(2 phi) modulation in the A(UL) asymmetry with a magnitude similar to that of the sin phi modulation is observed.
Keywords
NUCLEON, ASYMMETRIES, REGION, ELECTROPRODUCTION, FORWARD PARTON DISTRIBUTIONS, VIRTUAL COMPTON-SCATTERING, Lepton-Nucleon Scattering

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Chicago
Airapetian, A, N Akopov, Z Akopov, EC Aschenauer, W Augustyniak, R Avakian, A Avetissian, et al. 2010. “Exclusive Leptoproduction of Real Photons on a Longitudinally Polarised Hydrogen Target.” Journal of High Energy Physics (6).
APA
Airapetian, A., Akopov, N., Akopov, Z., Aschenauer, E., Augustyniak, W., Avakian, R., Avetissian, A., et al. (2010). Exclusive leptoproduction of real photons on a longitudinally polarised hydrogen target. JOURNAL OF HIGH ENERGY PHYSICS, (6).
Vancouver
1.
Airapetian A, Akopov N, Akopov Z, Aschenauer E, Augustyniak W, Avakian R, et al. Exclusive leptoproduction of real photons on a longitudinally polarised hydrogen target. JOURNAL OF HIGH ENERGY PHYSICS. 2010;(6).
MLA
Airapetian, A, N Akopov, Z Akopov, et al. “Exclusive Leptoproduction of Real Photons on a Longitudinally Polarised Hydrogen Target.” JOURNAL OF HIGH ENERGY PHYSICS 6 (2010): n. pag. Print.
@article{1300593,
  abstract     = {Polarisation asymmetries are measured for the hard exclusive leptoproduction of real photons from a longitudinally polarised hydrogen target. These asymmetries arise from the deeply virtual Compton scattering and Bethe-Heitler processes. From the data are extracted two asymmetries in the azimuthal distribution of produced real photons about the direction of the exchanged virtual photon: A(UL) with respect to the target polarisation and A(LL) with respect to the product of the beam and target polarisations. Results for both asymmetries are compared to the predictions from a generalised parton distribution model. The sin phi and cos(0 phi) amplitudes observed respectively for the A(UL) and A(LL) asymmetries are compatible with the sizeable predictions from the model. Unexpectedly, a sin(2 phi) modulation in the A(UL) asymmetry with a magnitude similar to that of the sin phi modulation is observed.},
  articleno    = {019},
  author       = {Airapetian, A and Akopov, N and Akopov, Z and Aschenauer, EC and Augustyniak, W and Avakian, R and Avetissian, A and Avetisyan, E and Ball, B and Belostotski, S and Bianchi, N and Blok, HP and Bottcher, H and Borissov, A and Bowles, J and Brodski, I and Bryzgalov, V and Burns, J and Capiluppi, M and Capitani, GP and Cisbani, E and Ciullo, G and Contalbrigo, M and Dalpiaz, PF and Deconinck, W and De Leo, R and De Nardo, Lara and De Sanctis, E and Diefenthaler, M and Di Nezza, P and Duren, M and Ehrenfried, M and Elbakian, G and Ellinghaus, F and Fabbri, R and Fantoni, A and Felawka, L and Frullani, S and Gabbert, Dominik and Gapienko, G and Gapienko, V and Garibaldi, F and Gavrilov, G and Gharibyan, V and Giordano, F and Gliske, S and Golembiovskaya, M and Hadjidakis, C and Hartig, M and Hasch, D and Hill, G and Hillenbrand, A and Hoek, M and Holler, Y and Hristova, I and Imazu, Y and Ivanilov, A and Izotov, A and Jackson, H and Jo, HS and Joosten, S and Kaiser, R and Karyan, G and Keri, T and Kinney, E and Kisselev, A and Kobayashi, N and Korotkov, V and Kozlov, V and Kravchenko, P and Krivokhijine, VG and Lagamba, L and Lamb, R and Lapikas, L and Lehmann, I and Lenisa, P and Linden-Levy, LA and Lopez Ruiz, Alejandro and Lorenzon, W and Lu, XG and Lu, XR and Ma, BQ and Mahon, D and Makins, NCR and Manaenkov, SI and Manfre, L and Mao, Y and Marianski, B and de la Ossa, AM and Marukyan, H and Miller, CA and Miyachi, Y and Movsisyan, A and Muccifora, V and Murray, M and Mussgiller, A and Nappi, E and Naryshkin, Y and Nass, A and Negodaev, M and Nowak, WD and Pappalardo, LL and Perez-Benito, R and Pickert, N and Raithel, M 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 Sanftl, F and Schafer, A and Schnell, Gunar and Schuler, KP and Seitz, B and Shibata, TA and Shutov, V and Stancari, M and Statera, M and Steffens, E and Steijger, JJM and Stenzel, H and Stewart, J and Stinzing, F and Taroian, S and Terkulov, A and Trzcinski, A and Tytgat, Michael and Vandenbroucke, A and van der Nat, PB and van Haarlem, Y and Van Hulse, Charlotte and Veretennikov, D and Vikhrov, V and Vilardi, I and Vogel, C and Wang, S and Yaschenko, S and Ye, H and Ye, Z and Yen, S and Yu, W and Zeiler, D and Zihlmann, B and Zupranski, P},
  issn         = {1126-6708},
  journal      = {JOURNAL OF HIGH ENERGY PHYSICS},
  keyword      = {NUCLEON,ASYMMETRIES,REGION,ELECTROPRODUCTION,FORWARD PARTON DISTRIBUTIONS,VIRTUAL COMPTON-SCATTERING,Lepton-Nucleon Scattering},
  language     = {eng},
  number       = {6},
  pages        = {19},
  title        = {Exclusive leptoproduction of real photons on a longitudinally polarised hydrogen target},
  url          = {http://dx.doi.org/10.1007/JHEP06(2010)019},
  year         = {2010},
}

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