; Ciullo, G. ; Court, G.R. ; Dalpiaz, P.F. ; De Leo, R. ; De Nardo, L. ; De Sanctis, E. ; De Schepper, D. ; Devitsin, E. ; de Witt Huberts, P.K.A. ; Di Nezza, P. ; Düren, M. ; Ehrenfried, M. ; Elbakian, G. ; Ellinghaus, F.
; Ely, J. ; Fabbri, R. ; Fantoni, A. ; Fechtchenko, A. ; Felawka, L. ; Filippone, B.W. ; Fischer, H. ; Fox, B. ; Franz, J. ; Frullani, S. ; Gärber, Y. ; Garibaldi, F. ; Garutti, E. ; Gavrilov, G. ; Gharibyan, V. ; Graw, G. ; Grebeniouk, O. ; Green, P.W. ; Greeniaus, L.G. ; Gute, A. ; Haeberli, W. ; Hafidi, K. ; Hartig, M. ; Hasch, D. ; Heesbeen, D. ; Heinsius, F.H. ; Henoch, M. ; Hertenberger, R. ; Hesselink, W.H.A. ; Hofman, G. ; Holler, Y. ; Holt, R.J. ; Hommez, B. ; Iarygin, G. ; Izotov, A. ; Jackson, H.E. ; Jgoun, A. ; Jung, P. ; Kaiser, R. ; Kisselev, A. ; Kitching, P. ; Königsmann, K. ; Kolster, H. ; Korotkov, V. ; Kotik, E. ; Kozlov, V. ; Krauss, B. ; Krivokhijine, V.G. ; Kyle, G. ; Lagamba, L.
; Laziev, A. ; Lenisa, P. ; Liebing, P. ; Lindemann, T. ; Lorenzon, W. ; Maas, A.
; Makins, N.C.R. ; Marukyan, H. ; Masoli, F. ; McIlhany, K. ; Meissner, F. ; Menden, F. ; Mexner, V. ; Meyners, N. ; Mikloukho, O. ; Milner, R. ; Muccifora, V. ; Nagaitsev, A. ; Nappi, E. ; Naryshkin, Y. ; Nass, A. ; Negodaeva, K. ; Nowak, W.-D. ; Oganessyan, K. ; O'Neill, T.G. ; Owen, B.R. ; Pate, S.F. ; Podiatchev, S. ; Potashov, S. ; Potterveld, D.H. ; Raithel, M. ; Rakness, G. ; Rappoport, V. ; Redwine, R. ; Reggiani, D. ; Reimer, P.
; Reolon, A.R. ; Rith, K. ; Robinson, D. ; Rostomyan, A. ; Ryckbosch, D. ; Sakemi, Y. ; Sanjiev, I. ; Sato, F. ; Savin, I. ; Scarlett, C. ; Schäfer, A. ; Schill, C. ; Schmidt, F. ; Schnell, G. ; Schüler, K.P. ; Schwind, A. ; Seibert, J. ; Seitz, B. ; Shibata, T.-A. ; Shutov, V. ; Simani, M.C. ; Simon, A. ; Sinram, K. ; Steffens, E. ; Steijger, J.J.M. ; Stewart, J. ; Stösslein, U. ; Suetsugu, K. ; Taroian, S. ; Terkulov, A.
; Tessarin, S. ; Thomas, E. ; Tipton, B. ; Tytgat, M.
; Urciuoli, G.M. ; van den Brand, J.F.J. ; van der Steenhoven, G. ; van de Vyver, R. ; Vetterli, M.C.
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; Visser, J. ; Volmer, J. ; Weiskopf, C. ; Wendland, J. ; Wilbert, J. ; Wise, T. ; Yen, S. ; Yoneyama, S. ; Zohrabian, H. | Item type: | Article | ||||
|---|---|---|---|---|---|
| Journal or Publication Title: | Physics Letters B | ||||
| Publisher: | ELSEVIER SCIENCE BV | ||||
| Place of Publication: | AMSTERDAM | ||||
| Volume: | 535 | ||||
| Number of Issue or Book Chapter: | 1-4 | ||||
| Page Range: | pp. 85-92 | ||||
| Date: | 2002 | ||||
| Institutions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer | ||||
| Identification Number: |
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| Keywords: | LEADING ORDER; | ||||
| Dewey Decimal Classification: | 500 Science > 530 Physics | ||||
| Status: | Published | ||||
| Refereed: | Yes, this version has been refereed | ||||
| Created at the University of Regensburg: | Yes | ||||
| Item ID: | 72967 |
Abstract
A single-spin asymmetry in the distribution of exclusively produced pi(+) mesons azimuthally around the virtual photon direction relative to the lepton scattering plane has been measured for the first time in deep-inelastic scattering of positrons off longitudinally polarized protons. Integrated over the experimental acceptance, the sin moment of the polarization asymmetry of the cross section is ...

Abstract
A single-spin asymmetry in the distribution of exclusively produced pi(+) mesons azimuthally around the virtual photon direction relative to the lepton scattering plane has been measured for the first time in deep-inelastic scattering of positrons off longitudinally polarized protons. Integrated over the experimental acceptance, the sin moment of the polarization asymmetry of the cross section is measured to be -0.18 +/- 0.05(stat.) +/- 0.02(syst.). The asymmetry is also studied as a function of the relevant kinematic variables, and its magnitude is found to grow with decreasing x and increasing -t and vanish at t --> t(min) (where x is the Bjorken scaling variable and t is the squared four-momentum transferred to the nucleon). (C) 2002 Elsevier Science B.V. All rights reserved.
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