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Titolo:
Flavor decomposition of the polarized quark distributions in the nucleon from inclusive and semi-inclusive deep-inelastic scattering
Autore:
Ackerstaff, K; Airapetian, A; Akopov, N; Akushevich, I; Amarian, M; Aschenauer, EC; Avakian, H; Avakian, R; Avetissian, A; Bains, B; Barrow, S; Baumgarten, C; Beckmann, M; Belostotski, S; Belz, JE; Benisch, T; Bernreuther, S; Bianchi, N; Blanchard, S; Blouw, J; Bottcher, H; Borissov, A; Brack, J; Bray, B; Brauksiepe, S; Braun, B; Brons, S; Bruckner, W; Brull, A; Bruins, EEW; Bulten, HJ; Cadman, RV; Capitani, GP; Carter, P; Chumney, P; Cisbani, E; Court, GR; Dalpiaz, PF; De Leo, R; Delheij, PPJ; De Sanctis, E; De Schepper, D; Devitsin, E; Huberts, PKAD; Di Nezza, P; Duren, M; Dvoredsky, A; Ely, J; Elbakian, G; Emerson, J; Fantoni, A; Fechtchenko, A; Ferstl, M; Fick, D; Fiedler, K; Filippone, BW; Fischer, H; Fortune, HT; Fox, B; Frabetti, S; Franz, J; Frullani, S; Funck, MA; Gagunashvili, ND; Galumian, P; Gao, H; Garber, Y; Garibaldi, F; Gavrilov, G; Geiger, P; Gharibyan, V; Golendukhin, A; Graw, G; Grebebiouk, O; Green, PW; Greeniaus, LG; Grosshauser, C; Guidal, M; Gute, A; Gyurjyan, V; Haas, JP; Haeberli, W; Hansen, JO; Hasch, D; Hausser, O; Henderson, R; Heinsius, FH; Henkes, T; Henoch, M; Hertenberger, R; Holler, Y; Holt, RJ; Hoprich, W; Ihssen, H; Iodice, M; Izotov, A; Jackson, HE; Jgoun, A; Jones, C; Kaiser, R; Kestel, M; Kinney, E; Kirsch, M; Kisselev, A; Kitching, P; Kobayashi, H; Koch, N; Konigsmann, K; Kolstein, M; Kolster, H; Korotkov, V; Korsch, W; Kozlov, V; Kramer, LH; Krause, B; Krivokhijine, VG; Kuckes, M; Kummell, F; Kurisuno, M; Kyle, G; Lachnit, W; Lorenzon, W; Lung, A; Makins, NCR; Martens, FK; Martin, JW; Marukyan, H; Masoli, F; Mateos, A; Maul, M; McAndrew, M; McIlhany, K; McKeown, RD; Meissner, F; Menden, F; Mercer, D; Metz, A; Meyners, N; Mikloukho, O; Miller, CA; Miller, MA; Milner, R; Mitsyn, V; Most, A; Mozzetti, R; Muccifora, V; Nagaitsev, A; Nappi, E; Naryshkin, Y; Nathan, AM; Neunreither, F; Niczyporuk, JM; Nowak, WD; Nupieri, M; Oelwein, P; Ogami, H; ONeill, TG; Openshaw, R; Owen, BR; Ouyang, J; Papavassiliou, V; Pate, SF; Pitt, M; Poolman, HR; Potashov, S; Potterveld, DH; Rakness, G; Reali, A; Redwine, R; Reolon, AR; Ristinen, R; Rith, K; Roper, G; Rossi, P; Rudnitsky, S; Ruh, M; Ryckbosch, D; Sakemi, Y; Savin, I; Scarlett, C; Schafer, A; Schmidt, F; Schmitt, H; Schnell, G; Schuler, KP; Schwind, A; Seibert, J; Shibata, TA; Shibatani, K; Shin, T; Shutov, V; Simani, C; Simon, A; Sinram, K; Slavich, P; Smythe, WR; Sowinski, J; Spengos, M; Steffens, E; Stenger, J; Stewart, J; Stock, F; Stoesslein, U; Sutter, M; Tallini, H; Taroian, S; Terkulov, A; Thiessen, DM; Tipton, B; Thomas, E; Trudel, A; Tytgat, M; Urciuoli, GM; van Hunen, JJ; van de Vyver, R; van den Brand, JFJ; van der Steenhoven, G; Vetterli, MC; Vikhrov, V; Vincter, M; Visser, J; Volk, E; Wander, W; Welch, TP; Wendland, J; Williamson, SE; Wise, T; Woller, K; Yoneyama, S; Zapfe, K; Zohrabian, H; Zurmuhle, R;
Indirizzi:
DESY, D-22603 Hamburg, Germany DESY Hamburg Germany D-22603DESY, D-22603 Hamburg, Germany Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada Univ Alberta Edmonton AB Canada T6G 2J1 hys, Edmonton, AB T6G 2J1, Canada Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA Argonne Natl Lab Argonne IL USA 60439 ab, Div Phys, Argonne, IL 60439 USA Ist Nazl Fis Nucl, Sezi Bari, I-70124 Bari, Italy Ist Nazl Fis Nucl BariItaly I-70124 ucl, Sezi Bari, I-70124 Bari, Italy CALTECH, WK Kellogg Radiat Lab, Pasadena, CA 91125 USA CALTECH Pasadena CA USA 91125 Kellogg Radiat Lab, Pasadena, CA 91125 USA Univ Colorado, Nucl Phys Lab, Boulder, CO 80309 USA Univ Colorado BoulderCO USA 80309 , Nucl Phys Lab, Boulder, CO 80309 USA DESY, D-15738 Zeuthen, Germany DESY Zeuthen Germany D-15738DESY, D-15738 Zeuthen, Germany Joint Inst Nucl Res, Dubna 141980, Russia Joint Inst Nucl Res Dubna Russia 141980 t Nucl Res, Dubna 141980, Russia Univ Erlangen Nurnberg, Inst Phys, D-91058 Erlangen, Germany Univ ErlangenNurnberg Erlangen Germany D-91058 -91058 Erlangen, Germany Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy Univ Ferrara Ferrara Italy I-44100 partmento Fis, I-44100 Ferrara, Italy Ist Nazl Fis Nucl, Sez Ferrara, I-44100 Ferrara, Italy Ist Nazl Fis Nucl Ferrara Italy I-44100 Ferrara, I-44100 Ferrara, Italy Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy Ist Nazl FisNucl Frascati Italy I-00044 ascati, I-00044 Frascati, Italy Florida Int Univ, Dept Phys, Miami, FL 33199 USA Florida Int Univ Miami FL USA 33199 Univ, Dept Phys, Miami, FL 33199 USA Univ Freiburg, Fak Phys, D-79104 Freiburg, Germany Univ Freiburg Freiburg Germany D-79104 k Phys, D-79104 Freiburg, Germany State Univ Ghent, Dept Subatom & Radiat Phys, B-9000 Ghent, Belgium State Univ Ghent Ghent Belgium B-9000 Radiat Phys, B-9000 Ghent, Belgium Max Planck Inst Kernphys, D-69029 Heidelberg, Germany Max Planck Inst Kernphys Heidelberg Germany D-69029 Heidelberg, Germany Univ Illinois, Dept Phys, Urbana, IL 61801 USA Univ Illinois Urbana IL USA 61801 linois, Dept Phys, Urbana, IL 61801 USA Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA Univ Kentucky Lexington KY USA 40506 ys & Astron, Lexington, KY 40506 USA Univ Liverpool, Dept Phys, Liverpool L69 7ZE, Merseyside, England Univ Liverpool Liverpool Merseyside England L69 7ZE , Merseyside, England Univ Wisconsin, Dept Phys, Madison, WI 53706 USA Univ Wisconsin Madison WI USA 53706 sin, Dept Phys, Madison, WI 53706 USA Univ Marburg, Inst Phys, D-35037 Marburg, Germany Univ Marburg Marburg Germany D-35037 Inst Phys, D-35037 Marburg, Germany MIT, Nucl Sci Lab, Cambridge, MA 02139 USA MIT Cambridge MA USA 02139MIT, Nucl Sci Lab, Cambridge, MA 02139 USA Univ Michigan, Randall Lab Phys, Ann Arbor, MI 48109 USA Univ Michigan Ann Arbor MI USA 48109 ll Lab Phys, Ann Arbor, MI 48109 USA PN Lebedev Phys Inst, Moscow 117924, Russia PN Lebedev Phys Inst Moscow Russia 117924 ys Inst, Moscow 117924, Russia Univ Munich, Sekt Phys, D-85748 Garching, Germany Univ Munich Garching Germany D-85748 ekt Phys, D-85748 Garching, Germany New Mexico State Univ, Dept Phys, Las Cruces, NM 88003 USA New Mexico State Univ Las Cruces NM USA 88003 s, Las Cruces, NM 88003 USA NIKHEF H, NL-1009 DB Amsterdam, Netherlands NIKHEF H Amsterdam Netherlands NL-1009 DB 1009 DB Amsterdam, Netherlands Oregon State Univ, Dept Phys, Corvallis, OR 97331 USA Oregon State Univ Corvallis OR USA 97331 pt Phys, Corvallis, OR 97331 USA Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA Univ Penn Philadelphia PA USA 19104 & Astron, Philadelphia, PA 19104 USA Petersburg Nucl Phys Inst, St Petersburg 188350, Russia Petersburg Nucl Phys Inst St Petersburg Russia 188350 urg 188350, Russia Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany Univ Regensburg Regensburg Germany D-93040 , D-93040 Regensburg, Germany Ist Nazl Fis Nucl, Sez Sanita, I-00161 Rome, Italy Ist Nazl Fis Nucl Rome Italy I-00161 cl, Sez Sanita, I-00161 Rome, Italy Ist Super Sanita, Phys Lab, I-00161 Rome, Italy Ist Super Sanita Rome Italy I-00161 anita, Phys Lab, I-00161 Rome, Italy Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada Simon Fraser Univ Burnaby BC Canada V5A 1S6 , Burnaby, BC V5A 1S6, Canada TRIUMF, Vancouver, BC V6T 2A3, Canada TRIUMF Vancouver BC Canada V6T 2A3TRIUMF, Vancouver, BC V6T 2A3, Canada Tokyo Inst Technol, Dept Phys, Tokyo 152, Japan Tokyo Inst Technol TokyoJapan 152 Technol, Dept Phys, Tokyo 152, Japan Free Univ Amsterdam, Dept Phys & Astron, NL-1081 HV Amsterdam, NetherlandsFree Univ Amsterdam Amsterdam Netherlands NL-1081 HV terdam, Netherlands Yerevan Phys Inst, Yerevan 375036, Armenia Yerevan Phys Inst Yerevan Armenia 375036 s Inst, Yerevan 375036, Armenia
Titolo Testata:
PHYSICS LETTERS B
fascicolo: 1-2, volume: 464, anno: 1999,
pagine: 123 - 134
SICI:
0370-2693(19991007)464:1-2<123:FDOTPQ>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPIN STRUCTURE-FUNCTION; STRUCTURE-FUNCTION G(1)(N); MUON-PROTON-SCATTERING; PARTON DISTRIBUTIONS; SUM-RULE; PRECISION-MEASUREMENT; GLOBAL ANALYSIS; DEUTERON; HE-3; ASYMMETRIES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
65
Recensione:
Indirizzi per estratti:
Indirizzo: Ackerstaff, K DESY, D-22603 Hamburg, Germany DESY Hamburg Germany D-22603 ESY, D-22603 Hamburg, Germany
Citazione:
K. Ackerstaff et al., "Flavor decomposition of the polarized quark distributions in the nucleon from inclusive and semi-inclusive deep-inelastic scattering", PHYS LETT B, 464(1-2), 1999, pp. 123-134

Abstract

Spin asymmetries of semi-inclusive cross sections for the production of positively and negatively charged hadrons have been measured in deep-inelastic scattering of polarized positrons on polarized hydrogen and He-3 targets,in the kinematic range 0.023 < x < 0.6 and 1 GeV2 < Q(2) < 10 GeV2. Polarized quark distributions are extracted as a function of x for up (u + (u) over bar) and down (d + (d) over bar) flavors. The up quark polarization is positive and the down quark polarization is negative in the measured range. The polarization of the sea is compatible with zero. The first moments of the polarized quark distributions are presented. The isospin non-singlet combination dq, is consistent with the prediction based on the Bjorken sum rule. The moments of the polarized quark distributions are compared to predictions based on SU(3)(f) flavor symmetry and to a prediction from lattice QCD. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

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Documento generato il 24/09/20 alle ore 23:38:28