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Measurement of the proton spin structure function g1(x,Q2) for Q2 from 0.15 to 1.6 GeV2 with CLAS.

Publication ,  Journal Article
Fatemi, R; Skabelin, AV; Burkert, VD; Crabb, D; De Vita, R; Kuhn, SE; Minehart, R; Adams, G; Anciant, E; Anghinolfi, M; Asavapibhop, B; Guo, L ...
Published in: Physical review letters
November 2003

Double-polarization asymmetries for inclusive ep scattering were measured at Jefferson Lab using 2.6 and 4.3 GeV longitudinally polarized electrons incident on a longitudinally polarized NH3 target in the CLAS detector. The polarized structure function g(1)(x,Q2) was extracted throughout the nucleon resonance region and into the deep inelastic regime, for Q(2)=0.15-1.64 GeV2. The contributions to the first moment Gamma(1)(Q2)= integral g(1)(x,Q2) dx were determined up to Q(2)=1.2 GeV2. Using a parametrization for g(1) in the unmeasured low x regions, the complete first moment was estimated over this Q2 region. A rapid change in Gamma(1) is observed for Q2<1 GeV2, with a sign change near Q(2)=0.3 GeV2, indicating dominant contributions from the resonance region. At Q(2)=1.2 GeV2 our data are below the perturbative QCD evolved scaling value.

Duke Scholars

Published In

Physical review letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

November 2003

Volume

91

Issue

22

Start / End Page

222002

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences
 

Citation

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Fatemi, R., Skabelin, A. V., Burkert, V. D., Crabb, D., De Vita, R., Kuhn, S. E., … CLAS Collaboration. (2003). Measurement of the proton spin structure function g1(x,Q2) for Q2 from 0.15 to 1.6 GeV2 with CLAS. Physical Review Letters, 91(22), 222002. https://doi.org/10.1103/physrevlett.91.222002
Fatemi, R., A. V. Skabelin, V. D. Burkert, D. Crabb, R. De Vita, S. E. Kuhn, R. Minehart, et al. “Measurement of the proton spin structure function g1(x,Q2) for Q2 from 0.15 to 1.6 GeV2 with CLAS.Physical Review Letters 91, no. 22 (November 2003): 222002. https://doi.org/10.1103/physrevlett.91.222002.
Fatemi R, Skabelin AV, Burkert VD, Crabb D, De Vita R, Kuhn SE, et al. Measurement of the proton spin structure function g1(x,Q2) for Q2 from 0.15 to 1.6 GeV2 with CLAS. Physical review letters. 2003 Nov;91(22):222002.
Fatemi, R., et al. “Measurement of the proton spin structure function g1(x,Q2) for Q2 from 0.15 to 1.6 GeV2 with CLAS.Physical Review Letters, vol. 91, no. 22, Nov. 2003, p. 222002. Epmc, doi:10.1103/physrevlett.91.222002.
Fatemi R, Skabelin AV, Burkert VD, Crabb D, De Vita R, Kuhn SE, Minehart R, Adams G, Anciant E, Anghinolfi M, Asavapibhop B, Audit G, Auger T, Avakian H, Bagdasaryan H, Ball JP, Barrow S, Battaglieri M, Beard K, Bektasoglu M, Bellis M, Bertozzi W, Bianchi N, Biselli AS, Boiarinov S, Bonner BE, Bosted PE, Bouchigny S, Bradford R, Branford D, Brooks WK, Butuceanu C, Calarco JR, Carman DS, Carnahan B, Cetina C, Ciciani L, Clark R, Cole PL, Coleman A, Connelly J, Cords D, Corvisiero P, Crannell H, Cummings JP, De Sanctis E, Degtyarenko PV, Denizli H, Dennis L, Dharmawardane KV, Dhuga KS, Djalali C, Dodge GE, Doughty D, Dragovitsch P, Dugger M, Dytman S, Eckhause M, Egiyan H, Egiyan KS, Elouadrhiri L, Empl A, Eugenio P, Farhi L, Feuerbach RJ, Freyberger A, Ficenec J, Forest TA, Frolov V, Funsten H, Gaff SJ, Garçon M, Gavalian G, Gilad S, Gilfoyle GP, Giovanetti KL, Girard P, Gordon CIO, Griffioen KA, Guidal M, Guillo M, Guo L, Gyurjyan V, Hadjidakis C, Hancock D, Hardie J, Heddle D, Heimberg P, Hersman FW, Hicks K, Hicks RS, Holtrop M, Hu J, Hyde-Wright CE, Ilieva Y, Ito MM, Jenkins D, Joo K, Keith C, Kelley JH, Kellie JD, Khandaker M, Kim KY, Kim K, Kim W, Klein A, Klein FJ, Klimenko AV, Klusman M, Kossov M, Koubarovski V, Kramer LH, Kuang Y, Kuhn J, Lachniet J, Laget JM, Lawrence D, Li J, Livingston K, Longhi A, Lukashin K, Major W, Manak JJ, Marchand C, McAleer S, McNabb JWC, Mecking BA, Mehrabyan S, Mestayer MD, Meyer CA, Mikhailov K, Mirazita M, Miskimen R, Morand L, Morrow SA, Muccifora V, Mueller J, Mutchler GS, Napolitano J, Nasseripour R, Nelson SO, Niccolai S, Niculescu G, Niculescu I, Niczyporuk BB, Niyazov RA, Nozar M, O’Brien JT, O’Rielly GV, Osipenko M, Park K, Pasyuk E, Peterson G, Pivnyuk N, Pocanic D, Pogorelko O, Polli E, Pozdniakov S, Preedom BM, Price JW, Prok Y, Protopopescu D, Qin LM, Raue BA, Riccardi G, Ricco G, Ripani M, Ritchie BG, Rock SE, Ronchetti F, Rossi P, Rowntree D, Rubin PD, Sabatié F, Sabourov K, Salgado C, Santoro JP, Sapunenko V, Sargsyan M, Schumacher RA, Seely M, Serov VS, Sharabian YG, Shaw J, Simionatto S, Smith ES, Smith T, Smith LC, Sober DI, Sorrel L, Spraker M, Stavinsky A, Stepanyan S, Stoler P, Strauch S, Taiuti M, Taylor S, Tedeschi DJ, Thoma U, Thompson R, Todor L, Tur C, Ungaro M, Vineyard MF, Vlassov AV, Wang K, Weinstein LB, Weller H, Weygand DP, Whisnant CS, Wolin E, Wood MH, Yegneswaran A, Yun J, Zhang B, Zhao J, Zhou Z, CLAS Collaboration. Measurement of the proton spin structure function g1(x,Q2) for Q2 from 0.15 to 1.6 GeV2 with CLAS. Physical review letters. 2003 Nov;91(22):222002.

Published In

Physical review letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

November 2003

Volume

91

Issue

22

Start / End Page

222002

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences