; Elschenbroich, U. ; Ely, J. ; Fabbri, R. ; Fantoni, A. ; Fechtchenko, A. ; Felawka, L. ; Fox, B. ; Franz, J. ; Frullani, S. ; Gärber, Y. ; Gapienko, G. ; Gapienko, V. ; Garibaldi, F. ; Garrow, K. ; Garutti, E. ; Gaskell, D. ; Gavrilov, G. ; Gharibyan, V. ; Graw, G. ; Grebeniouk, O. ; Greeniaus, L. G. ; Hafidi, K. ; Hartig, M. ; Hasch, D. ; Heesbeen, D. ; Henoch, M. ; Hertenberger, R. ; Hesselink, W. H. A. ; Hillenbrand, A. ; Hoek, M.
; Holler, Y. ; Hommez, B. ; Iarygin, G. ; Ivanilov, A. ; Izotov, A. ; Jackson, H. E. ; Jgoun, A. ; Kaiser, R. ; Kinney, E. ; Kisselev, A. ; Königsmann, K. ; Kopytin, M. ; Korotkov, V. ; Kozlov, V. ; Krauss, B. ; Krivokhijine, V. G. ; Lagamba, L.
; Lapikás, L. ; Laziev, A. ; Lenisa, P. ; Liebing, P. ; Lindemann, T. ; Lipka, K. ; Lorenzon, W. ; Lu, J. ; Maiheu, B. ; Makins, N. C. R. ; Marianski, B. ; Marukyan, H. ; Masoli, F. ; Mexner, V. ; Meyners, N. ; Mikloukho, O. ; Miller, C. A. ; Miyachi, Y. ; Muccifora, V. ; Nagaitsev, A. ; Nappi, E. ; Naryshkin, Y. ; Nass, A. ; Negodaev, M. ; Nowak, W.-D. ; Oganessyan, K. ; Ohsuga, H. ; Orlandi, G. ; Pickert, N. ; Potashov, S. ; Potterveld, D. H. ; Raithel, M. ; Reggiani, D. ; Reimer, P. E.
; Reischl, A. ; Reolon, A. R. ; Riedl, C. ; Rith, K. ; Rosner, G. ; Rostomyan, A. ; Rubacek, L. ; Ryckbosch, D. ; Salomatin, Y. ; Sanjiev, I. ; Savin, I. ; Scarlett, C. ; Schäfer, A. ; Schill, C. ; Schnell, G. ; Schüler, K. P. ; Schwind, A. ; Seele, J. ; Seidl, R. ; Seitz, B. ; Shanidze, R. ; Shearer, C. ; Shibata, T.-A. ; Shutov, V. ; Simani, M. C. ; Sinram, K. ; Stancari, M. ; Statera, M. ; Steffens, E. ; Steijger, J. J. M. ; Stewart, J. ; Stösslein, U. ; Tait, P. ; Tanaka, H. ; Taroian, S. ; Tchuiko, B. ; Terkulov, A.
; Tkabladze, A. ; Trzcinski, A. ; Tytgat, M.
; Vandenbroucke, A. ; van der Nat, P. ; van der Steenhoven, G. ; Vetterli, M. C.
; Vikhrov, V. ; Vincter, M. G.
; Visser, J. ; Vogel, C. ; Vogt, M. ; Volmer, J. ; Weiskopf, C. ; Wendland, J. ; Wilbert, J. ; Ybeles Smit, G. ; Yen, S. ; Zihlmann, B. ; Zohrabian, H. ; Zupranski, P. | Item type: | Article | ||||
|---|---|---|---|---|---|
| Journal or Publication Title: | Physical Review Letters | ||||
| Publisher: | AMER PHYSICAL SOC | ||||
| Place of Publication: | COLLEGE PK | ||||
| Volume: | 92 | ||||
| Number of Issue or Book Chapter: | 1 | ||||
| Date: | 2004 | ||||
| Institutions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer | ||||
| Identification Number: |
| ||||
| Keywords: | HERMES POLARIZED HYDROGEN; FRAGMENTATION FUNCTIONS; PARTON DISTRIBUTIONS; QCD ANALYSIS; TARGET; PROTON; ASYMMETRIES; POLARIMETER; PIONS; HERA; | ||||
| 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: | 71805 |
Abstract
Double-spin asymmetries of semiinclusive cross sections for the production of identified pions and kaons have been measured in deep inelastic scattering of polarized positrons on a polarized deuterium target. Five helicity distributions including those for three sea quark flavors were extracted from these data together with reanalyzed previous data for identified pions from a hydrogen target. ...

Abstract
Double-spin asymmetries of semiinclusive cross sections for the production of identified pions and kaons have been measured in deep inelastic scattering of polarized positrons on a polarized deuterium target. Five helicity distributions including those for three sea quark flavors were extracted from these data together with reanalyzed previous data for identified pions from a hydrogen target. These distributions are consistent with zero for all three sea flavors. A recently predicted flavor asymmetry in the polarization of the light quark sea appears to be disfavored by the data.
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