Flavor decomposition of the polarized quark distributions in the nucleon from inclusive and semi-inclusive deep-inelastic scattering

K. Ackerstaff; A. Airapetian; N. Akopov; I. Akushevich; M. Amarian; E. C. Aschenauer; H. Avakian; R. Avakian; A. Avetissian; B. Bains; S. Barrow; C. Baumgarten; M. Beckmann; S. Belostotski; J. E. Belz; T. Benisch; S. Bernreuther; N. Bianchi; S. Blanchard; J. Blouw; H. Böttcher; A. Borissov; J. Brack; B. Bray; S. Brauksiepe; B. Braun; S. Brons; W. Brückner; A. Brüll; E. E.W. Bruins; H. J. Bulten; R. V. Cadman; G. P. Capitani; P. Carter; P. Chumney; E. Cisbani; G. R. Court; P. F. Dalpiaz; R. de Leo; P. P.J. Delheij; E. de Sanctis; D. de Schepper; E. Devitsin; P. K.A. de Witt Huberts; P. di Nezza; M. Düren; A. Dvoredsky; J. Ely; G. Elbakian; J. Emerson; A. Fantoni; A. Fechtchenko; M. Ferstl; D. Fick; K. Fiedler; B. W. Filippone; H. Fischer; H. T. Fortune; B. Fox; S. Frabetti; J. Franz; S. Frullani; M. A. Funk; N. D. Gagunashvili; P. Galumian; H. Gao; Y. Gärber; F. Garibaldi; G. Gavrilov; P. Geiger; V. Gharibyan; A. Golendukhin; G. Graw; O. Grebeniouk; P. W. Green; L. G. Greeniaus; C. Grosshauser; M. Guidal; A. Gute; V. Gyurjyan; J. P. Haas; W. Haeberli; J. O. Hansen; D. Hasch; O. Häusser; R. Henderson; F. H. Heinsius; T. Henkes; M. Henoch; R. Hertenberger; Y. Holler; R. J. Holt; W. Hoprich; H. Ihssen; M. Iodice; A. Izotov; H. E. Jackson; A. Jgoun; C. Jones; R. Kaiser; M. Kestel; E. Kinney; M. Kirsch; A. Kisselev; P. Kitching; H. Kobayashi; N. Koch; K. Königsmann; M. Kolstein; H. Kolster; V. Korotkov; W. Korsch; V. Kozlov; L. H. Kramer; B. Krause; V. G. Krivokhijine; M. Kückes; F. Kümmell; M. Kurisuno; G. Kyle; W. Lachnit; W. Lorenzon; A. Lung; N. C.R. Makins; F. K. Martens; J. W. Martin; H. Marukyan; F. Masoli; A. Mateos; M. Maul; M. McAndrew; K. McIlhany; R. D. McKeown; F. Meissner; F. Menden; D. Mercer; A. Metz; N. Meyners; O. Mikloukho; C. A. Miller; M. A. Miller; R. Milner; V. Mitsyn; A. Most; R. Mozzetti; V. Muccifora; A. Nagaitsev; E. Nappi; Y. Naryshkin; A. M. Nathan; F. Neunreither; J. M. Niczyporuk; W. D. Nowak; M. Nupieri; P. Oelwein; H. Ogami; T. G. O'Neill; R. Openshaw; B. R. Owen; J. Ouyang; V. Papavassiliou; S. F. Pate; M. Pitt; H. R. Poolman; S. Potashov; D. H. Potterveld; G. Rakness; A. Reali; R. Redwine; A. R. Reolon; R. Ristinen; K. Rith; G. Röper; P. Rossi; S. Rudnitsky; M. Ruh; D. Ryckbosch; Y. Sakemi; I. Savin; C. Scarlett; A. Schafer; F. Schmidt; H. Schmitt; G. Schnell; K. P. Schüler; A. Schwind; J. Seibert; T. A. Shibata; K. Shibatani; T. Shin; V. Shutov; C. Simani; A. Simon; K. Sinram; P. Slavich; W. R. Smythe; J. Sowinski; M. Spengos; E. Steffens; J. Stenger; J. Stewart; F. Stock; U. Stoesslein; M. Sutter; H. Tallini; S. Taroian; A. Terkulov; D. M. Thiessen; B. Tipton; E. Thomas; A. Trudel; M. Tytgat; G. M. Urciuoli; J. J. van Hunen; R. van de Vyver; J. F.J. van den Brand; G. van der Steenhoven; M. C. Vetterli; V. Vikhrov; M. Vincter; J. Visser; E. Volk; W. Wander; T. P. Welch; J. Wendland; S. E. Williamson; T. Wise; K. Woller; S. Yoneyama; K. Zapfe; H. Zohrabian; R. Zurmühle

doi:10.1016/S0370-2693(99)00964-8

Flavor decomposition of the polarized quark distributions in the nucleon from inclusive and semi-inclusive deep-inelastic scattering

K. Ackerstaff, A. Airapetian, N. Akopov, I. Akushevich, M. Amarian, E. C. Aschenauer, H. Avakian, R. Avakian, A. Avetissian, B. Bains, S. Barrow, C. Baumgarten, M. Beckmann, S. Belostotski, J. E. Belz, T. Benisch, S. Bernreuther, N. Bianchi, S. Blanchard, J. BlouwH. Böttcher, A. Borissov, J. Brack, B. Bray, S. Brauksiepe, B. Braun, S. Brons, W. Brückner, A. Brüll, E. E.W. Bruins, H. J. Bulten, R. V. Cadman, G. P. Capitani, P. Carter, P. Chumney, E. Cisbani, G. R. Court, P. F. Dalpiaz, R. de Leo, P. P.J. Delheij, E. de Sanctis, D. de Schepper, E. Devitsin, P. K.A. de Witt Huberts, P. di Nezza, M. Düren, A. Dvoredsky, J. Ely, G. Elbakian, J. Emerson, A. Fantoni, A. Fechtchenko, M. Ferstl, D. Fick, K. Fiedler, B. W. Filippone, H. Fischer, H. T. Fortune, B. Fox, S. Frabetti, J. Franz, S. Frullani, M. A. Funk, N. D. Gagunashvili, P. Galumian, H. Gao, Y. Gärber, F. Garibaldi, G. Gavrilov, P. Geiger, V. Gharibyan, A. Golendukhin, G. Graw, O. Grebeniouk, P. W. Green, L. G. Greeniaus, C. Grosshauser, M. Guidal, A. Gute, V. Gyurjyan, J. P. Haas, W. Haeberli, J. O. Hansen, D. Hasch, O. Häusser, R. Henderson, F. H. Heinsius, T. Henkes, M. Henoch, R. Hertenberger, Y. Holler, R. J. Holt, W. Hoprich, H. Ihssen, M. Iodice, A. Izotov, H. E. Jackson, A. Jgoun, C. Jones, R. Kaiser, M. Kestel, E. Kinney, M. Kirsch, A. Kisselev, P. Kitching, H. Kobayashi, N. Koch, K. Königsmann, M. Kolstein, H. Kolster, V. Korotkov, W. Korsch, V. Kozlov, L. H. Kramer, B. Krause, V. G. Krivokhijine, M. Kückes, F. Kümmell, M. Kurisuno, G. Kyle, W. Lachnit, W. Lorenzon, A. Lung, N. C.R. Makins, F. K. Martens, J. W. Martin, H. Marukyan, F. Masoli, A. Mateos, M. Maul, M. McAndrew, K. McIlhany, R. D. McKeown, F. Meissner, F. Menden, D. Mercer, A. Metz, N. Meyners, O. Mikloukho, C. A. Miller, M. A. Miller, R. Milner, V. Mitsyn, A. Most, R. Mozzetti, V. Muccifora, A. Nagaitsev, E. Nappi, Y. Naryshkin, A. M. Nathan, F. Neunreither, J. M. Niczyporuk, W. D. Nowak, M. Nupieri, P. Oelwein, H. Ogami, T. G. O'Neill, R. Openshaw, B. R. Owen, J. Ouyang, V. Papavassiliou, S. F. Pate, M. Pitt, H. R. Poolman, S. Potashov, D. H. Potterveld, G. Rakness, A. Reali, R. Redwine, A. R. Reolon, R. Ristinen, K. Rith, G. Röper, P. Rossi, S. Rudnitsky, M. Ruh, D. Ryckbosch, Y. Sakemi, I. Savin, C. Scarlett, A. Schafer, F. Schmidt, H. Schmitt, G. Schnell, K. P. Schüler, A. Schwind, J. Seibert, T. A. Shibata, K. Shibatani, T. Shin, V. Shutov, C. Simani, A. Simon, K. Sinram, P. Slavich, W. R. Smythe, J. Sowinski, M. Spengos, E. Steffens, J. Stenger, J. Stewart, F. Stock, U. Stoesslein, M. Sutter, H. Tallini, S. Taroian, A. Terkulov, D. M. Thiessen, B. Tipton, E. Thomas, A. Trudel, M. Tytgat, G. M. Urciuoli, J. J. van Hunen, R. van de Vyver, J. F.J. van den Brand, G. van der Steenhoven, M. C. Vetterli, V. Vikhrov, M. Vincter, J. Visser, E. Volk, W. Wander, T. P. Welch, J. Wendland, S. E. Williamson, T. Wise, K. Woller, S. Yoneyama, K. Zapfe, H. Zohrabian, R. Zurmühle

Physics And Astronomy

Research output: Contribution to journal › Article › peer-review

184 Scopus citations

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 targets, in the kinematic range 0.023 < x < 0.6 and 1 GeV² < Q² < 10 GeV². Polarized quark distributions are extracted as a function of x for up (u + ū) and down (d + d̄) 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 Δq₃ 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.

Original language	English
Pages (from-to)	123-134
Number of pages	12
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	464
Issue number	1-2
DOIs	https://doi.org/10.1016/S0370-2693(99)00964-8
State	Published - 1999

Bibliographical note

Funding Information:
We gratefully acknowledge the DESY management for its support and the DESY staff and the staffs of the collaborating institutions. This work was supported by the FWO-Flanders, Belgium; the Natural Sciences and Engineering Research Council of Canada; the INTAS, HCM, and TMR network contributions from the European Community; the German Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie; the Deutscher Akademischer Austauschdienst (DAAD); the Italian Istituto Nazionale di Fisica Nucleare (INFN); Monbusho, JSPS, and Toray Science Foundation of Japan; the Dutch Foundation for Fundamenteel Onderzoek der Materie (FOM); the UK Particle Physics and Astronomy Research Council; and the US Department of Energy and National Science Foundation.

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1016/S0370-2693(99)00964-8

Cite this

Ackerstaff, K., Airapetian, A., Akopov, N., Akushevich, I., Amarian, M., Aschenauer, E. C., Avakian, H., Avakian, R., Avetissian, A., Bains, B., Barrow, S., Baumgarten, C., Beckmann, M., Belostotski, S., Belz, J. E., Benisch, T., Bernreuther, S., Bianchi, N., Blanchard, S., ... Zurmühle, R. (1999). Flavor decomposition of the polarized quark distributions in the nucleon from inclusive and semi-inclusive deep-inelastic scattering. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 464(1-2), 123-134. https://doi.org/10.1016/S0370-2693(99)00964-8

@article{3b41e6ca484b4dff891dfb5c00f34cc8,

title = "Flavor decomposition of the polarized quark distributions in the nucleon from inclusive and semi-inclusive deep-inelastic scattering",

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 targets, in the kinematic range 0.023 < x < 0.6 and 1 GeV2 < Q2 < 10 GeV2. Polarized quark distributions are extracted as a function of x for up (u + ū) and down (d + {\=d}) 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 Δq3 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.",

author = "K. Ackerstaff and A. Airapetian and N. Akopov and I. Akushevich and M. Amarian and Aschenauer, {E. C.} and H. Avakian and R. Avakian and A. Avetissian and B. Bains and S. Barrow and C. Baumgarten and M. Beckmann and S. Belostotski and Belz, {J. E.} and T. Benisch and S. Bernreuther and N. Bianchi and S. Blanchard and J. Blouw and H. B{\"o}ttcher and A. Borissov and J. Brack and B. Bray and S. Brauksiepe and B. Braun and S. Brons and W. Br{\"u}ckner and A. Br{\"u}ll and Bruins, {E. E.W.} and Bulten, {H. J.} and Cadman, {R. V.} and Capitani, {G. P.} and P. Carter and P. Chumney and E. Cisbani and Court, {G. R.} and Dalpiaz, {P. F.} and {de Leo}, R. and Delheij, {P. P.J.} and {de Sanctis}, E. and {de Schepper}, D. and E. Devitsin and {de Witt Huberts}, {P. K.A.} and {di Nezza}, P. and M. D{\"u}ren and A. Dvoredsky and J. Ely and G. Elbakian and J. Emerson and A. Fantoni and A. Fechtchenko and M. Ferstl and D. Fick and K. Fiedler and Filippone, {B. W.} and H. Fischer and Fortune, {H. T.} and B. Fox and S. Frabetti and J. Franz and S. Frullani and Funk, {M. A.} and Gagunashvili, {N. D.} and P. Galumian and H. Gao and Y. G{\"a}rber and F. Garibaldi and G. Gavrilov and P. Geiger and V. Gharibyan and A. Golendukhin and G. Graw and O. Grebeniouk and Green, {P. W.} and Greeniaus, {L. G.} and C. Grosshauser and M. Guidal and A. Gute and V. Gyurjyan and Haas, {J. P.} and W. Haeberli and Hansen, {J. O.} and D. Hasch and O. H{\"a}usser and R. Henderson and Heinsius, {F. H.} and T. Henkes and M. Henoch and R. Hertenberger and Y. Holler and Holt, {R. J.} and W. Hoprich and H. Ihssen and M. Iodice and A. Izotov and Jackson, {H. E.} and A. Jgoun and C. Jones and R. Kaiser and M. Kestel and E. Kinney and M. Kirsch and A. Kisselev and P. Kitching and H. Kobayashi and N. Koch and K. K{\"o}nigsmann and M. Kolstein and H. Kolster and V. Korotkov and W. Korsch and V. Kozlov and Kramer, {L. H.} and B. Krause and Krivokhijine, {V. G.} and M. K{\"u}ckes and F. K{\"u}mmell and M. Kurisuno and G. Kyle and W. Lachnit and W. Lorenzon and A. Lung and Makins, {N. C.R.} and Martens, {F. K.} and Martin, {J. W.} and H. Marukyan and F. Masoli and A. Mateos and M. Maul and M. McAndrew and K. McIlhany and McKeown, {R. D.} and F. Meissner and F. Menden and D. Mercer and A. Metz and N. Meyners and O. Mikloukho and Miller, {C. A.} and Miller, {M. A.} and R. Milner and V. Mitsyn and A. Most and R. Mozzetti and V. Muccifora and A. Nagaitsev and E. Nappi and Y. Naryshkin and Nathan, {A. M.} and F. Neunreither and Niczyporuk, {J. M.} and Nowak, {W. D.} and M. Nupieri and P. Oelwein and H. Ogami and O'Neill, {T. G.} and R. Openshaw and Owen, {B. R.} and J. Ouyang and V. Papavassiliou and Pate, {S. F.} and M. Pitt and Poolman, {H. R.} and S. Potashov and Potterveld, {D. H.} and G. Rakness and A. Reali and R. Redwine and Reolon, {A. R.} and R. Ristinen and K. Rith and G. R{\"o}per and P. Rossi and S. Rudnitsky and M. Ruh and D. Ryckbosch and Y. Sakemi and I. Savin and C. Scarlett and A. Schafer and F. Schmidt and H. Schmitt and G. Schnell and Sch{\"u}ler, {K. P.} and A. Schwind and J. Seibert and Shibata, {T. A.} and K. Shibatani and T. Shin and V. Shutov and C. Simani and A. Simon and K. Sinram and P. Slavich and Smythe, {W. R.} and J. Sowinski and M. Spengos and E. Steffens and J. Stenger and J. Stewart and F. Stock and U. Stoesslein and M. Sutter and H. Tallini and S. Taroian and A. Terkulov and Thiessen, {D. M.} and B. Tipton and E. Thomas and A. Trudel and M. Tytgat and Urciuoli, {G. M.} and {van Hunen}, {J. J.} and {van de Vyver}, R. and {van den Brand}, {J. F.J.} and {van der Steenhoven}, G. and Vetterli, {M. C.} and V. Vikhrov and M. Vincter and J. Visser and E. Volk and W. Wander and Welch, {T. P.} and J. Wendland and Williamson, {S. E.} and T. Wise and K. Woller and S. Yoneyama and K. Zapfe and H. Zohrabian and R. Zurm{\"u}hle",

note = "Funding Information: We gratefully acknowledge the DESY management for its support and the DESY staff and the staffs of the collaborating institutions. This work was supported by the FWO-Flanders, Belgium; the Natural Sciences and Engineering Research Council of Canada; the INTAS, HCM, and TMR network contributions from the European Community; the German Bundesministerium f{\"u}r Bildung, Wissenschaft, Forschung und Technologie; the Deutscher Akademischer Austauschdienst (DAAD); the Italian Istituto Nazionale di Fisica Nucleare (INFN); Monbusho, JSPS, and Toray Science Foundation of Japan; the Dutch Foundation for Fundamenteel Onderzoek der Materie (FOM); the UK Particle Physics and Astronomy Research Council; and the US Department of Energy and National Science Foundation.",

year = "1999",

doi = "10.1016/S0370-2693(99)00964-8",

language = "English",

volume = "464",

pages = "123--134",

number = "1-2",

}

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, Böttcher, H, Borissov, A, Brack, J, Bray, B, Brauksiepe, S, Braun, B, Brons, S, Brückner, W, Brüll, 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, de Witt Huberts, PKA, di Nezza, P, Düren, 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, Funk, MA, Gagunashvili, ND, Galumian, P, Gao, H, Gärber, Y, Garibaldi, F, Gavrilov, G, Geiger, P, Gharibyan, V, Golendukhin, A, Graw, G, Grebeniouk, O, Green, PW, Greeniaus, LG, Grosshauser, C, Guidal, M, Gute, A, Gyurjyan, V, Haas, JP, Haeberli, W, Hansen, JO, Hasch, D, Häusser, 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, Königsmann, K, Kolstein, M, Kolster, H, Korotkov, V, Korsch, W, Kozlov, V, Kramer, LH, Krause, B, Krivokhijine, VG, Kückes, M, Kümmell, 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, O'Neill, 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, Röper, G, Rossi, P, Rudnitsky, S, Ruh, M, Ryckbosch, D, Sakemi, Y, Savin, I, Scarlett, C, Schafer, A, Schmidt, F, Schmitt, H, Schnell, G, Schüler, 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 & Zurmühle, R 1999, 'Flavor decomposition of the polarized quark distributions in the nucleon from inclusive and semi-inclusive deep-inelastic scattering', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 464, no. 1-2, pp. 123-134. https://doi.org/10.1016/S0370-2693(99)00964-8

Flavor decomposition of the polarized quark distributions in the nucleon from inclusive and semi-inclusive deep-inelastic scattering. / Ackerstaff, K.; Airapetian, A.; Akopov, N. et al.
In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 464, No. 1-2, 1999, p. 123-134.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Flavor decomposition of the polarized quark distributions in the nucleon from inclusive and semi-inclusive deep-inelastic scattering

AU - Ackerstaff, K.

AU - Airapetian, A.

AU - Akopov, N.

AU - Akushevich, I.

AU - Amarian, M.

AU - Aschenauer, E. C.

AU - Avakian, H.

AU - Avakian, R.

AU - Avetissian, A.

AU - Bains, B.

AU - Barrow, S.

AU - Baumgarten, C.

AU - Beckmann, M.

AU - Belostotski, S.

AU - Belz, J. E.

AU - Benisch, T.

AU - Bernreuther, S.

AU - Bianchi, N.

AU - Blanchard, S.

AU - Blouw, J.

AU - Böttcher, H.

AU - Borissov, A.

AU - Brack, J.

AU - Bray, B.

AU - Brauksiepe, S.

AU - Braun, B.

AU - Brons, S.

AU - Brückner, W.

AU - Brüll, A.

AU - Bruins, E. E.W.

AU - Bulten, H. J.

AU - Cadman, R. V.

AU - Capitani, G. P.

AU - Carter, P.

AU - Chumney, P.

AU - Cisbani, E.

AU - Court, G. R.

AU - Dalpiaz, P. F.

AU - de Leo, R.

AU - Delheij, P. P.J.

AU - de Sanctis, E.

AU - de Schepper, D.

AU - Devitsin, E.

AU - de Witt Huberts, P. K.A.

AU - di Nezza, P.

AU - Düren, M.

AU - Dvoredsky, A.

AU - Ely, J.

AU - Elbakian, G.

AU - Emerson, J.

AU - Fantoni, A.

AU - Fechtchenko, A.

AU - Ferstl, M.

AU - Fick, D.

AU - Fiedler, K.

AU - Filippone, B. W.

AU - Fischer, H.

AU - Fortune, H. T.

AU - Fox, B.

AU - Frabetti, S.

AU - Franz, J.

AU - Frullani, S.

AU - Funk, M. A.

AU - Gagunashvili, N. D.

AU - Galumian, P.

AU - Gao, H.

AU - Gärber, Y.

AU - Garibaldi, F.

AU - Gavrilov, G.

AU - Geiger, P.

AU - Gharibyan, V.

AU - Golendukhin, A.

AU - Graw, G.

AU - Grebeniouk, O.

AU - Green, P. W.

AU - Greeniaus, L. G.

AU - Grosshauser, C.

AU - Guidal, M.

AU - Gute, A.

AU - Gyurjyan, V.

AU - Haas, J. P.

AU - Haeberli, W.

AU - Hansen, J. O.

AU - Hasch, D.

AU - Häusser, O.

AU - Henderson, R.

AU - Heinsius, F. H.

AU - Henkes, T.

AU - Henoch, M.

AU - Hertenberger, R.

AU - Holler, Y.

AU - Holt, R. J.

AU - Hoprich, W.

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N1 - Funding Information: We gratefully acknowledge the DESY management for its support and the DESY staff and the staffs of the collaborating institutions. This work was supported by the FWO-Flanders, Belgium; the Natural Sciences and Engineering Research Council of Canada; the INTAS, HCM, and TMR network contributions from the European Community; the German Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie; the Deutscher Akademischer Austauschdienst (DAAD); the Italian Istituto Nazionale di Fisica Nucleare (INFN); Monbusho, JSPS, and Toray Science Foundation of Japan; the Dutch Foundation for Fundamenteel Onderzoek der Materie (FOM); the UK Particle Physics and Astronomy Research Council; and the US Department of Energy and National Science Foundation.

PY - 1999

Y1 - 1999

N2 - 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 targets, in the kinematic range 0.023 < x < 0.6 and 1 GeV2 < Q2 < 10 GeV2. Polarized quark distributions are extracted as a function of x for up (u + ū) and down (d + d̄) 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 Δq3 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.

AB - 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 targets, in the kinematic range 0.023 < x < 0.6 and 1 GeV2 < Q2 < 10 GeV2. Polarized quark distributions are extracted as a function of x for up (u + ū) and down (d + d̄) 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 Δq3 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.

UR - http://www.scopus.com/inward/record.url?scp=0038901078&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0038901078&partnerID=8YFLogxK

U2 - 10.1016/S0370-2693(99)00964-8

DO - 10.1016/S0370-2693(99)00964-8

M3 - Article

AN - SCOPUS:0038901078

SN - 0370-2693

VL - 464

SP - 123

EP - 134

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1-2

ER -

Flavor decomposition of the polarized quark distributions in the nucleon from inclusive and semi-inclusive deep-inelastic scattering

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