; Ciullo, G. ; Contalbrigo, M. ; Dalpiaz, P. F. ; Deconinck, W.
; De Leo, R. ; De Nardo, L. ; De Sanctis, E. ; Diefenthaler, M. ; Di Nezza, P. ; Düren, M. ; Ehrenfried, M. ; Elbakian, G. ; Ellinghaus, F.
; Fabbri, R. ; Fantoni, A. ; Felawka, L. ; Frullani, S. ; Gabbert, D. ; Gapienko, G. ; Gapienko, V. ; Garibaldi, F. ; Gavrilov, G. ; Gharibyan, V. ; Giordano, F. ; Gliske, S.
; Golembiovskaya, M. ; Hadjidakis, C. ; Hartig, M. ; Hasch, D. ; Hill, G. ; Hillenbrand, A. ; Hoek, M. ; Holler, Y. ; Hristova, I. ; Imazu, Y. ; Ivanilov, A. ; Izotov, A. ; Jackson, H. E. ; Jo, H. S. ; Joosten, S. ; Kaiser, R. ; Karyan, G. ; Keri, T. ; Kinney, E. ; Kisselev, A. ; Kobayashi, N. ; Korotkov, V. ; Kozlov, V. ; Kravchenko, P. ; Krivokhijine, V. G. ; Lagamba, L. ; Lamb, R. ; Lapikás, L. ; Lehmann, I. ; Lenisa, P. ; Linden-Levy, L. A. ; López Ruiz, A. ; Lorenzon, W. ; Lu, X.-G.
; Lu, X.-R.
; Ma, B.-Q. ; Mahon, D. ; Makins, N. C. R. ; Manaenkov, S. I. ; Manfré, L. ; Mao, Y. ; Marianski, B. ; de la Ossa, A. Martinez ; Marukyan, H. ; Miller, C. A. ; Miyachi, Y. ; Movsisyan, A. ; Muccifora, V. ; Murray, M. ; Mussgiller, A. ; Nappi, E. ; Naryshkin, Y. ; Nass, A. ; Negodaev, M. ; Nowak, W.-D. ; Pappalardo, L. L. ; Perez-Benito, R. ; Pickert, N. ; Raithel, M. ; Reimer, P. E.
; Reolon, A. R. ; Riedl, C. ; Rith, K. ; Rosner, G. ; Rostomyan, A. ; Rubin, J. ; Ryckbosch, D. ; Salomatin, Y. ; Sanftl, F. ; Schäfer, A. ; Schnell, G. ; Schüler, K. P. ; Seitz, B. ; Shibata, T.-A. ; Shutov, V. ; Stancari, M. ; Statera, M. ; Steffens, E. ; Steijger, J. J. M. ; Stenzel, H. ; Stewart, J. ; Stinzing, F. ; Taroian, S. ; Terkulov, A.
; Trzcinski, A. ; Tytgat, M. ; Vandenbroucke, A. ; van der Nat, P. B. ; Van Haarlem, Y. ; Van Hulse, C. ; Veretennikov, D. ; Vikhrov, V. ; Vilardi, I. ; Vogel, C. ; Wang, S. ; Yaschenko, S. ; Ye, H. ; Ye, Z. ; Yen, S. ; Yu, W. ; Zeiler, D. ; Zihlmann, B. ; Zupranski, P. | Dokumentenart: | Artikel | ||||
|---|---|---|---|---|---|
| Titel eines Journals oder einer Zeitschrift: | Journal of High Energy Physics | ||||
| Verlag: | SPRINGER | ||||
| Ort der Veröffentlichung: | NEW YORK | ||||
| Band: | 2010 | ||||
| Nummer des Zeitschriftenheftes oder des Kapitels: | 6 | ||||
| Datum: | 2010 | ||||
| Institutionen: | Physik > Institut für Theoretische Physik > Lehrstuhl Professor Schäfer > Arbeitsgruppe Andreas Schäfer | ||||
| Identifikationsnummer: |
| ||||
| Stichwörter / Keywords: | VIRTUAL COMPTON-SCATTERING; FORWARD PARTON DISTRIBUTIONS; ELECTROPRODUCTION; ASYMMETRIES; NUCLEON; REGION; Lepton-Nucleon Scattering | ||||
| Dewey-Dezimal-Klassifikation: | 500 Naturwissenschaften und Mathematik > 530 Physik | ||||
| Status: | Veröffentlicht | ||||
| Begutachtet: | Ja, diese Version wurde begutachtet | ||||
| An der Universität Regensburg entstanden: | Ja | ||||
| Dokumenten-ID: | 66074 |
Zusammenfassung
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) ...

Zusammenfassung
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.
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