The spin-dependent structure function of the proton g1 p and a test of the Bjorken sum rule
Publication
, Journal Article
Alekseev, MG; Alexakhin, VY; Alexandrov, Y; Alexeev, GD; Amoroso, A; Austregesilo, A; Badełek, B; Balestra, F; Ball, J; Barth, J; Baum, G ...
Published in: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
July 5, 2010
The inclusive double-spin asymmetry, A1p, has been measured at COMPASS in deep-inelastic polarised muon scattering off a large polarised NH3 target. The data, collected in the year 2007, cover the range Q2 > 1 (GeV / c)2, 0.004 < x < 0.7 and improve the statistical precision of g1p (x) by a factor of two in the region x < 0.02. The new proton asymmetries are combined with those previously published for the deuteron to extract the non-singlet spin-dependent structure function g1NS (x, Q2). The isovector quark density, Δ q3 (x, Q2), is evaluated from a NLO QCD fit of g1NS. The first moment of Δ q3 is in good agreement with the value predicted by the Bjorken sum rule and corresponds to a ratio of the axial and vector coupling constants | gA / gV | = 1.28 ± 0.07 (stat .) ± 0.10 (syst.). © 2010 Elsevier B.V. All rights reserved.
Duke Scholars
Published In
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
DOI
ISSN
0370-2693
Publication Date
July 5, 2010
Volume
690
Issue
5
Start / End Page
466 / 472
Related Subject Headings
- Nuclear & Particles Physics
- 51 Physical sciences
- 49 Mathematical sciences
- 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
- 0201 Astronomical and Space Sciences
- 0105 Mathematical Physics
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APA
Chicago
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MLA
NLM
Alekseev, M. G., Alexakhin, V. Y., Alexandrov, Y., Alexeev, G. D., Amoroso, A., Austregesilo, A., … Kolosov, V. N. (2010). The spin-dependent structure function of the proton g1 p and a test of the Bjorken sum rule. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 690(5), 466–472. https://doi.org/10.1016/j.physletb.2010.05.069
Alekseev, M. G., V. Y. Alexakhin, Y. Alexandrov, G. D. Alexeev, A. Amoroso, A. Austregesilo, B. Badełek, et al. “The spin-dependent structure function of the proton g1 p and a test of the Bjorken sum rule.” Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 690, no. 5 (July 5, 2010): 466–72. https://doi.org/10.1016/j.physletb.2010.05.069.
Alekseev MG, Alexakhin VY, Alexandrov Y, Alexeev GD, Amoroso A, Austregesilo A, et al. The spin-dependent structure function of the proton g1 p and a test of the Bjorken sum rule. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2010 Jul 5;690(5):466–72.
Alekseev, M. G., et al. “The spin-dependent structure function of the proton g1 p and a test of the Bjorken sum rule.” Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 690, no. 5, July 2010, pp. 466–72. Scopus, doi:10.1016/j.physletb.2010.05.069.
Alekseev MG, Alexakhin VY, Alexandrov Y, Alexeev GD, Amoroso A, Austregesilo A, Badełek B, Balestra F, Ball J, Barth J, Baum G, Bedfer Y, Bernhard J, Bertini R, Bettinelli M, Birsa R, Bisplinghoff J, Bordalo P, Bradamante F, Bravar A, Bressan A, Brona G, Burtin E, Bussa MP, Chaberny D, Čotić D, Chiosso M, Chung SU, Cicuttin A, Colantoni M, Crespo ML, Torre SD, Das S, Dasgupta SS, Denisov OY, Dhara L, Diaz V, Donskov SV, Doshita N, Duic V, Dünnweber W, Efremov A, El Alaoui A, Eversheim PD, Eyrich W, Faessler M, Ferrero A, Filin A, Finger M, Fischer H, Franco C, Friedrich JM, Garfagnini R, Gautheron F, Gavrichtchouk OP, Gazda R, Gerassimov S, Geyer R, Giorgi M, Gnesi I, Gobbo B, Goertz S, Grabmüller S, Grasso A, Grube B, Gushterski R, Guskov A, Haas F, von Harrach D, Hasegawa T, Heinsius FH, Hermann R, Herrmann F, Heß C, Hinterberger F, Horikawa N, Höppner C, d’Hose N, Ilgner C, Ishimoto S, Ivanov O, Ivanshin Y, Iwata T, Jahn R, Jasinski P, Jegou G, Joosten R, Kabuß E, Käfer W, Kang D, Ketzer B, Khaustov GV, Khokhlov YA, Kisselev Y, Klein F, Klimaszewski K, Koblitz S, Koivuniemi JH, Kolosov VN. The spin-dependent structure function of the proton g1 p and a test of the Bjorken sum rule. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2010 Jul 5;690(5):466–472.
Published In
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
DOI
ISSN
0370-2693
Publication Date
July 5, 2010
Volume
690
Issue
5
Start / End Page
466 / 472
Related Subject Headings
- Nuclear & Particles Physics
- 51 Physical sciences
- 49 Mathematical sciences
- 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
- 0201 Astronomical and Space Sciences
- 0105 Mathematical Physics