/ Experiment-HEP hep-ex/0407032


Quark helicity distributions in the nucleon for up, down, and strange quarks from semi-inclusive deep-inelastic scattering


Airapetian, A. (Yerevan Phys. Inst.) ; Akopov, N. (Yerevan Phys. Inst.) ; Akopov, Z. (Yerevan Phys. Inst.) ; Amarian, M. (Yerevan Phys. Inst.) ; Ammosov, V.V. (Serpukhov, IHEP) ; Andrus, A. (Illinois U., Urbana) ; Aschenauer, E.C. (DESY, Zeuthen) ; Augustyniak, W. (Warsaw, Inst. Nucl. Studies) ; Avakian, R. (Yerevan Phys. Inst.) ; Avetissian, A. (Yerevan Phys. Inst.) ; Avetissian, E. (Frascati) ; Bailey, P. (Illinois U., Urbana) ; Baturin, V. (St. Petersburg, INP) ; Baumgarten, C. (Munich U.) ; Beckmann, M. (DESY) ; Belostotski, S. (St. Petersburg, INP) ; Bernreuther, S. (Erlangen - Nuremberg U.) ; Bianchi, N. (Frascati) ; Blok, H.P. (Vrije U., Amsterdam) ; Blumlein, J. (DESY, Zeuthen) ; Bottcher, H. (DESY, Zeuthen) ; Borissov, A. (Michigan U.) ; Borysenko, A. (Frascati) ; Bouwhuis, M. (Illinois U., Urbana) ; Brack, J. (Colorado U.) ; Brull, A. (MIT, LNS) ; Bryzgalov, V. (Serpukhov, IHEP) ; Capitani, G.P. (Frascati) ; Chiang, H.C. (Illinois U., Urbana) ; Ciullo, G. (Ferrara U.) ; Contalbrigo, M. (Ferrara U.) ; Dalpiaz, P.F. (Ferrara U.) ; De Leo, R. (INFN, Bari) ; De Nardo, L. (Alberta U.) ; De Sanctis, E. (Frascati) ; Devitsin, E. (Lebedev Inst.) ; Di Nezza, P. (Frascati) ; Duren, M. (Giessen U.) ; Ehrenfried, M. (Erlangen - Nuremberg U.) ; Elalaoui-Moulay, A. (Argonne) ; Elbakian, G. (Yerevan Phys. Inst.) ; Ellinghaus, F. (DESY, Zeuthen) ; Elschenbroich, U. (Gent U.) ; Ely, J. (Colorado U.) ; Fabbri, R. (Ferrara U.) ; Fantoni, A. (Frascati) ; Fechtchenko, A. (Dubna, JINR) ; Felawka, L. (TRIUMF) ; Fox, B. (Colorado U.) ; Franz, J. (Freiburg U.) ; Frullani, S. (Rome, ISS) ; Gapienko, G. (Serpukhov, IHEP) ; Gapienko, V. (Serpukhov, IHEP) ; Garibaldi, F. (Rome, ISS) ; Garrow, K. (Simon Fraser U.) ; Garutti, E. (NIKHEF, Amsterdam) ; Gaskell, D. (Colorado U.) ; Gavrilov, G. (TRIUMF) ; Gharibyan, V. (Yerevan Phys. Inst.) ; Graw, G. (Munich U.) ; Grebeniouk, O. (St. Petersburg, INP) ; Greeniaus, L.G. (TRIUMF) ; Gregor, I.M. (DESY, Zeuthen) ; Hafidi, K. (Argonne) ; Hartig, M. (TRIUMF) ; Hasch, D. (Frascati) ; Heesbeen, D. (NIKHEF, Amsterdam) ; Henoch, M. (Erlangen - Nuremberg U.) ; Hertenberger, R. (Munich U.) ; Hesselink, W.H.A. (Vrije U., Amsterdam) ; Hillenbrand, A. (Erlangen - Nuremberg U.) ; Hoek, M. (Giessen U.) ; Holler, Y. (DESY) ; Hommez, B. (Gent U.) ; Iarygin, G. (Dubna, JINR) ; Ivanilov, A. (Serpukhov, IHEP) ; Izotov, A. (St. Petersburg, INP) ; Jackson, H.E. (Argonne) ; Jgoun, A. (St. Petersburg, INP) ; Kaiser, R. (Glasgow U.) ; Kinney, E. (Colorado U.) ; Kisselev, A. (St. Petersburg, INP) ; Konigsmann, K. (Freiburg U.) ; Kopytin, M. (DESY, Zeuthen) ; Korotkov, V. (DESY, Zeuthen) ; Kozlov, V. (Lebedev Inst.) ; Krauss, B. (Erlangen - Nuremberg U.) ; Krivokhijine, V.G. (Dubna, JINR) ; Lagamba, L. (INFN, Bari) ; Lapikas, L. (NIKHEF, Amsterdam) ; Laziev, A. (Vrije U., Amsterdam) ; Lenisa, P. (Ferrara U.) ; Liebing, P. (DESY, Zeuthen) ; Lindemann, T. (DESY) ; Linden-Levy, L.A. (Illinois U., Urbana) ; Lipka, K. (DESY, Zeuthen) ; Lorenzon, W. (Michigan U.) ; Lu, J. (TRIUMF) ; Maiheu, B. (Gent U.) ; Makins, N.C.R. (Illinois U., Urbana) ; Marianski, B. (Warsaw, Inst. Nucl. Studies) ; Marukyan, H. (Yerevan Phys. Inst.) ; Masoli, F. (Ferrara U.) ; Mexner, V. (NIKHEF, Amsterdam) ; Meyners, N. (DESY) ; Mikloukho, O. (St. Petersburg, INP) ; Miller, C.A. (TRIUMF) ; Miyachi, Y. (Tokyo Inst. Tech.) ; Muccifora, V. (Frascati) ; Nagaitsev, A. (Dubna, JINR) ; Nappi, E. (INFN, Bari) ; Naryshkin, Y. (St. Petersburg, INP) ; Nass, A. (Erlangen - Nuremberg U.) ; Negodaev, M. (DESY, Zeuthen) ; Nowak, W.D. (DESY, Zeuthen) ; Oganessyan, K. (Frascati) ; Ohsuga, H. (Tokyo Inst. Tech.) ; Pickert, N. (Erlangen - Nuremberg U.) ; Potashov, S. (Lebedev Inst.) ; Potterveld, D.H. (Argonne) ; Raithel, M. (Erlangen - Nuremberg U.) ; Reggiani, D. (Ferrara U.) ; Reimer, P.E. (Argonne) ; Reischl, A. (NIKHEF, Amsterdam) ; Reolon, A.R. (Frascati) ; Riedl, C. (Erlangen - Nuremberg U.) ; Rith, K. (Erlangen - Nuremberg U.) ; Rosner, G. (Glasgow U.) ; Rostomyan, A. (Yerevan Phys. Inst.) ; Rubacek, L. (Giessen U.) ; Rubin, J. (Illinois U., Urbana) ; Ryckbosch, D. (Gent U.) ; Salomatin, Y. (Serpukhov, IHEP) ; Sanjiev, I. (St. Petersburg, INP) ; Savin, I. (Dubna, JINR) ; Scarlett, C. (Michigan U.) ; Schafer, A. (Regensburg U.) ; Schill, C. (Freiburg U.) ; Schnell, G. (DESY, Zeuthen) ; Schuler, K.P. (DESY) ; Schwind, A. (DESY, Zeuthen) ; Seele, J. (Illinois U., Urbana) ; Seidl, R. (Erlangen - Nuremberg U.) ; Seitz, B. (Giessen U.) ; Shanidze, R. (Erlangen - Nuremberg U.) ; Shearer, C. (Glasgow U.) ; Shibata, T.A. (Tokyo Inst. Tech.) ; Shutov, V. (Dubna, JINR) ; Simani, M.C. (Vrije U., Amsterdam) ; Sinram, K. (DESY) ; Stancari, M. (Ferrara U.) ; Statera, M. (Ferrara U.) ; Steffens, E. (Erlangen - Nuremberg U.) ; Steijger, J.J.M. (NIKHEF, Amsterdam) ; Stenzel, H. (Giessen U.) ; Stewart, J. (DESY, Zeuthen) ; Stosslein, U. (Colorado U.) ; Tait, P. (Erlangen - Nuremberg U.) ; Tanaka, H. (Tokyo Inst. Tech.) ; Taroian, S. (Yerevan Phys. Inst.) ; Tchuiko, B. (Serpukhov, IHEP) ; Terkulov, A. (Lebedev Inst.) ; Tkabladze, A. (Gent U.) ; Trzcinski, A. (Warsaw, Inst. Nucl. Studies) ; Tytgat, M. (Gent U.) ; Vandenbroucke, A. (Gent U.) ; van der Nat, P. (Vrije U., Amsterdam) ; van der Steenhoven, G. (NIKHEF, Amsterdam) ; Vetterli, M.C. (TRIUMF) ; Vikhrov, V. (St. Petersburg, INP) ; Vincter, M.G. (Alberta U.) ; Vogel, C. (Erlangen - Nuremberg U.) ; Vogt, M. (Erlangen - Nuremberg U.) ; Volmer, J. (DESY, Zeuthen) ; Weiskopf, C. (Erlangen - Nuremberg U.) ; Wendland, J. (TRIUMF) ; Wilbert, J. (Erlangen - Nuremberg U.) ; Ybeles Smit, G. (Vrije U., Amsterdam) ; Yen, S. (TRIUMF) ; Zihlmann, B. (NIKHEF, Amsterdam) ; Zohrabian, H. (Yerevan Phys. Inst.) ; Zupranski, P. (Warsaw, Inst. Nucl. Studies)

Published in: Phys.Rev.
Year: 2005
Vol.: D71
Page No: 012003

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 re--analysis 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.

Web-Page: http://www.adsabs.harvard.edu/abs/2005PhRvD..71a2003A; http://dx.doi.org/10.1103/PhysRevD.71.012003; http://link.aps.org/abstract/PRD/V71/E012003

Total numbers of views: 1689
Numbers of unique views: 735
e-proceeding
 Record created 2010-10-28, last modified 2014-01-30


External links:
Download fulltextADSABS
Download fulltextDOI
Download fulltextPHRVA-D
Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)