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Gluon polarisation in the nucleon and longitudinal double spin asymmetries from open charm muoproduction

Publication ,  Journal Article
Alekseev, M; Alexakhin, VY; Alexandrov, Y; Alexeev, GD; Amoroso, A; Austregisilio, A; Badełek, B; Balestra, F; Ball, J; Barth, J; Baum, G ...
Published in: Physics Letters Section B Nuclear Elementary Particle and High Energy Physics
June 1, 2009

The gluon polarisation in the nucleon has been determined by detecting charm production via D0 meson decay to charged K and π in polarised muon scattering off a longitudinally polarised deuteron target. The data were taken by the COMPASS Collaboration at CERN between 2002 and 2006 and correspond to an integrated luminosity of 2.8 fb-1. The dominant underlying process of charm production is the photon-gluon fusion to a c over(c, ̄) pair. A leading order QCD approach gives an average gluon polarisation of 〈 Δ g / g 〉x = - 0.49 ± 0.27 (stat) ± 0.11 (syst) at a scale μ2 ≈ 13   (GeV / c)2 and at an average gluon momentum fraction 〈 x 〉 ≈ 0.11. The longitudinal cross-section asymmetry for D0 production is presented in bins of the transverse momentum and the energy of the D0 meson. © 2009 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

June 1, 2009

Volume

676

Issue

1-3

Start / End Page

31 / 38

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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Alekseev, M., Alexakhin, V. Y., Alexandrov, Y., Alexeev, G. D., Amoroso, A., Austregisilio, A., … Klein, F. (2009). Gluon polarisation in the nucleon and longitudinal double spin asymmetries from open charm muoproduction. Physics Letters Section B Nuclear Elementary Particle and High Energy Physics, 676(1–3), 31–38. https://doi.org/10.1016/j.physletb.2009.04.059
Alekseev, M., V. Y. Alexakhin, Y. Alexandrov, G. D. Alexeev, A. Amoroso, A. Austregisilio, B. Badełek, et al. “Gluon polarisation in the nucleon and longitudinal double spin asymmetries from open charm muoproduction.” Physics Letters Section B Nuclear Elementary Particle and High Energy Physics 676, no. 1–3 (June 1, 2009): 31–38. https://doi.org/10.1016/j.physletb.2009.04.059.
Alekseev M, Alexakhin VY, Alexandrov Y, Alexeev GD, Amoroso A, Austregisilio A, et al. Gluon polarisation in the nucleon and longitudinal double spin asymmetries from open charm muoproduction. Physics Letters Section B Nuclear Elementary Particle and High Energy Physics. 2009 Jun 1;676(1–3):31–8.
Alekseev, M., et al. “Gluon polarisation in the nucleon and longitudinal double spin asymmetries from open charm muoproduction.” Physics Letters Section B Nuclear Elementary Particle and High Energy Physics, vol. 676, no. 1–3, June 2009, pp. 31–38. Scopus, doi:10.1016/j.physletb.2009.04.059.
Alekseev M, Alexakhin VY, Alexandrov Y, Alexeev GD, Amoroso A, Austregisilio 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, Chapiro A, Chiosso M, Chung SU, Cicuttin A, Colantoni M, Crespo ML, Torre SD, Dafni T, Das S, Dasgupta SS, Denisov OY, Dhara L, Diaz V, Dinkelbach AM, Donskov SV, Doshita N, Duic V, Dünnweber W, Efremov A, El Alaoui A, Eversheim PD, Eyrich W, Faessler M, Ferrero A, Finger M, Fischer H, Franco C, Friedrich JM, Garfagnini R, Gautheron F, Gavrichtchouk OP, Gazda R, Gerassimov S, Geyer R, Giorgi M, Gobbo B, Goertz S, Grabmüller S, Grajek OA, Grasso A, Grube B, Gushterski R, Guskov A, Haas F, Hagemann R, von Harrach D, Hasegawa T, Heckmann J, Heinsius FH, Hermann R, Herrmann F, Heß C, Hinterberger F, von Hodenberg M, 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, Kiefer J, Kisselev Y, Klein F. Gluon polarisation in the nucleon and longitudinal double spin asymmetries from open charm muoproduction. Physics Letters Section B Nuclear Elementary Particle and High Energy Physics. 2009 Jun 1;676(1–3):31–38.
Journal cover image

Published In

Physics Letters Section B Nuclear Elementary Particle and High Energy Physics

DOI

ISSN

0370-2693

Publication Date

June 1, 2009

Volume

676

Issue

1-3

Start / End Page

31 / 38

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