Advanced search
1 file | 1.20 MB

Ratios of helicity amplitudes for exclusive ρ0 electroproduction

Author
Organization
Abstract
Exclusive rho(0)-meson electroproduction is studied in the HERMES experiment, using a 27.6 GeV longitudinally polarized electron/positron beam and unpolarized hydrogen and deuterium targets in the kinematic region 0.5 GeV2 < Q(2) < 7.0 GeV2, 3.0 GeV < W < 6.3 GeV, and -t' < 0.4 GeV2. Real and imaginary parts of the ratios of the natural-parity-exchange helicity amplitudes T-11 (gamma*(T) -> rho T), T-01 (gamma*(T) -> rho(L)), T-10 (gamma*(L) -> rho(T)), and T1-1 (gamma*(-T) -> rho(T)) to T-00 (gamma*(L) -> rho(L)) are extracted from the data. For the unnatural-parity-exchange amplitude U-11, the ratio vertical bar U-11/T-00 vertical bar is obtained. The Q(2) and t' dependences of these ratios are presented and compared with perturbative QCD predictions.
Keywords
ELASTIC ELECTROPRODUCTION, DIFFRACTIVE ELECTROPRODUCTION, GENERALIZED PARTON DISTRIBUTIONS, VECTOR-MESON PRODUCTION, J/PSI MESONS, P(0) MESONS, HERA, SCATTERING, QCD, HYDROGEN

Downloads

  • Airapetian 2011 EPJC 71 4 1609.pdf
    • full text
    • |
    • open access
    • |
    • PDF
    • |
    • 1.20 MB

Citation

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

Chicago
Airapetian, A, N Akopov, Z Akopov, EC Aschenauer, W Augustyniak, R Avakian, A Avetissian, et al. 2011. “Ratios of Helicity Amplitudes for Exclusive Ρ0 Electroproduction.” European Physical Journal C 71 (4).
APA
Airapetian, A., Akopov, N., Akopov, Z., Aschenauer, E., Augustyniak, W., Avakian, R., Avetissian, A., et al. (2011). Ratios of helicity amplitudes for exclusive ρ0 electroproduction. EUROPEAN PHYSICAL JOURNAL C, 71(4).
Vancouver
1.
Airapetian A, Akopov N, Akopov Z, Aschenauer E, Augustyniak W, Avakian R, et al. Ratios of helicity amplitudes for exclusive ρ0 electroproduction. EUROPEAN PHYSICAL JOURNAL C. 2011;71(4).
MLA
Airapetian, A, N Akopov, Z Akopov, et al. “Ratios of Helicity Amplitudes for Exclusive Ρ0 Electroproduction.” EUROPEAN PHYSICAL JOURNAL C 71.4 (2011): n. pag. Print.
@article{1316551,
  abstract     = {Exclusive rho(0)-meson electroproduction is studied in the HERMES experiment, using a 27.6 GeV longitudinally polarized electron/positron beam and unpolarized hydrogen and deuterium targets in the kinematic region 0.5 GeV2 {\textlangle} Q(2) {\textlangle} 7.0 GeV2, 3.0 GeV {\textlangle} W {\textlangle} 6.3 GeV, and -t' {\textlangle} 0.4 GeV2. Real and imaginary parts of the ratios of the natural-parity-exchange helicity amplitudes T-11 (gamma*(T) -{\textrangle} rho T), T-01 (gamma*(T) -{\textrangle} rho(L)), T-10 (gamma*(L) -{\textrangle} rho(T)), and T1-1 (gamma*(-T) -{\textrangle} rho(T)) to T-00 (gamma*(L) -{\textrangle} rho(L)) are extracted from the data. For the unnatural-parity-exchange amplitude U-11, the ratio vertical bar U-11/T-00 vertical bar is obtained. The Q(2) and t' dependences of these ratios are presented and compared with perturbative QCD predictions.},
  articleno    = {1609},
  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 Belostotski, S and Bianchi, N and Blok, HP and Borissov, A and Bowles, J 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 Jackson, HE 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 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 Stinzing, F and Taroian, S and Terkulov, A and Trzcinski, A and Tytgat, Michael and Vandenbroucke, A and Van Haarlem, Y and Van Hulse, Charlotte and Veretennikov, D and Vikhrov, V and Vilardi, I and Wang, S and Yaschenko, S and Yen, S and Yu, W and Zihlmann, B and Zupranski, P},
  issn         = {1434-6044},
  journal      = {EUROPEAN PHYSICAL JOURNAL C},
  keyword      = {ELASTIC ELECTROPRODUCTION,DIFFRACTIVE ELECTROPRODUCTION,GENERALIZED PARTON DISTRIBUTIONS,VECTOR-MESON PRODUCTION,J/PSI MESONS,P(0) MESONS,HERA,SCATTERING,QCD,HYDROGEN},
  language     = {eng},
  number       = {4},
  pages        = {25},
  title        = {Ratios of helicity amplitudes for exclusive \ensuremath{\rho}0 electroproduction},
  url          = {http://dx.doi.org/10.1140/epjc/s10052-011-1609-2},
  volume       = {71},
  year         = {2011},
}

Altmetric
View in Altmetric
Web of Science
Times cited: