Airapetian, A. and Akopov, N and Akopov, Z and Amarian, M and Ammosov, VV and Andrus, A and Aschenauer, EC and Augustyniak, W and Avakian, R and Avetissian, A and Avetissian, E and Bailey, P and Baturin, V and Baumgarten, C and Beckmann, M and Belostotski, S and Bernreuther, S and Bianchi, N and Blok, HP and Blumlein, J and Bottcher, H and Borissov, A and Borysenko, A and Bouwhuis, M and Brack, J and Brull, A and Bryzgalov, V and Capitani, GP and Chiang, HC and Ciullo, G and Contalbrigo, M and Dalpiaz, PF and De Leo, R and De Nardo, L and De Sanctis, E and Devitsin, E and Di Nezza, P and Duren, M and Ehrenfried, M and Elalaoui-Moulay, A and Elbakian, G and Ellinghaus, F and Elschenbroich, U and Ely, J and Fabbri, R and Fantoni, A and Fechtchenko, A and Felawka, L and Fox, B and Franz, J and Frullani, S and Gapienko, G and Gapienko, V and Garibaldi, F and Garrow, K and Garutti, E and Gaskell, D and Gavrilov, G and Gharibyan, V and Graw, G and Grebeniouk, O and Greeniaus, LG and Gregor, IM and Hafidi, K and Hartig, M and Hasch, D and Heesbeen, D and Henoch, M and Hertenberger, R and Hesselink, WHA and Hillenbrand, A and Hoek, M and Holler, Y and Hommez, B and Iarygin, G and Ivanilov, A and Izotov, A and Jackson, HE and Jgoun, A and Kaiser, R and Kinney, E and Kisselev, A and Konigsmann, K and Kopytin, M and Korotkov, V and Kozlov, V and Krauss, B and Krivokhijine, VG and Lagamba, L and Lapikas, L and Laziev, A and Lenisa, P and Liebing, P and Lindemann, T and Linden-Levy, LA and Lipka, K and Lorenzon, W and Lu, J and Maiheu, B and Makins, NCR and Marianski, B and Marukyan, H and Masoli, F and Mexner, V and Meyners, N and Mikloukho, O and Miller, CA and Miyachi, Y and Muccifora, V and Nagaitsev, A and Nappi, E and Naryshkin, Y and Nass, A and Negodaev, M and Nowak, WD and Oganessyan, K and Ohsuga, H and Pickert, N and Potashov, S and Potterveld, DH and Raithel, M and Reggiani, D and Reimer, PE and Reischl, A and Reolon, AR and Riedl, C and Rith, K and Rosner, G and Rostomyan, A and Rubacek, L and Rubin, J and Ryckbosch, D and Salomatin, Y and Sanjiev, I and Savin, I and Scarlett, C and Schaefer, Andreas and Schill, C and Schnell, G and Schuler, KP and Schwind, A and Seele, J and Seidl, R and Seitz, B and Shanidze, R and Shearer, C and Shibata, TA and Shutov, V and Simani, MC and Sinram, K and Stancari, M and Statera, M and Steffens, E and Steijger, JJM and Stenzel, H and Stewart, J and Stosslein, U and Tait, P and Tanaka, H and Taroian, S and Tchuiko, B and Terkulov, A and Tkabladze, A and Trzcinski, A and Tytgat, M and Vandenbroucke, A and van der Nat, P and van der Steenhoven, G and Vetterli, MC and Vikhrov, V and Vincter, MG and Vogel, C and Vogt, M and Volmer, J and Weiskopf, C and Wendland, J and Wilbert, J and Smit, GY and Yen, S and Zihlmann, B and Zohrabian, H and Zupranski, P (2005) Quark helicity distributions in the nucleon for up, down, and strange quarks from semi-inclusive deep-inelastic scattering. PHYSICAL REVIEW D, 71 (1): 012003. ISSN 2470-0010, 2470-0029
Full text not available from this repository.Abstract
Polarized deep-inelastic scattering data on longitudinally polarized hydrogen and deuterium targets have been used to determine double-spin asymmetries of cross sections. Inclusive and semi-inclusive asymmetries for the production of positive and negative pions from hydrogen were obtained in a reanalysis of previously published data. Inclusive and semi-inclusive asymmetries for the production of negative and positive pions and kaons were measured on a polarized deuterium target. The separate helicity densities for the up and down quarks and the anti-up, anti-down, and strange sea quarks were computed from these asymmetries in a "leading order" QCD analysis. The polarization of the up-quark is positive and that of the down-quark is negative. All extracted sea quark polarizations are consistent with zero, and the light quark sea helicity densities are flavor symmetric within the experimental uncertainties. First and second moments of the extracted quark helicity densities in the measured range are consistent with fits of inclusive data.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TO-LEADING ORDER; SMALL-X-BEHAVIOR; POLARIZED PARTON DISTRIBUTIONS; PHYSICS EVENT GENERATION; MUON PROTON-SCATTERING; INTERNAL GAS-TARGET; N-C LIMIT; FLAVOR ASYMMETRY; SPIN STRUCTURE; HERMES EXPERIMENT; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 21 Jun 2021 06:55 |
| Last Modified: | 21 Jun 2021 06:55 |
| URI: | https://pred.uni-regensburg.de/id/eprint/36810 |
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