Direct J/ψ hadroproduction in k factorization and the color octet mechanism

Ph. Hägler, R. Kirschner, A. Schäfer, L. Szymanowski, and O. V. Teryaev
Phys. Rev. D 63, 077501 – Published 23 February 2001
PDFExport Citation

Abstract

The hadroproduction of direct J/ψ in the framework of the k-factorization approach is studied. The color-singlet contribution is essentially larger than in the collinear approach but is still an order of magnitude below the data. The deficit may be well described by the color octet contribution with the value of the matrix element 0|O8J/ψ(3S1)|0 substantially decreased in comparison with fits in the collinear factorization. This should lead to a reduction of the large transverse polarization, predicted in the collinear approach.

  • Received 4 October 2000

DOI:https://doi.org/10.1103/PhysRevD.63.077501

©2001 American Physical Society

Authors & Affiliations

Ph. Hägler1, R. Kirschner2, A. Schäfer1, L. Szymanowski1,3, and O. V. Teryaev1,4

  • 1Institut für Theoretische Physik, Universität Regensburg, D-93040 Regensburg, Germany
  • 2Institut für Theoretische Physik, Universität Leipzig, D-04109 Leipzig, Germany
  • 3Soltan Institute for Nuclear Studies, Hoza 69, 00689 Warsaw, Poland
  • 4Bogoliubov Laboratory of Theoretical Physics, JINR, 141980 Dubna, Russia

References (Subscription Required)

Click to Expand
Issue

Vol. 63, Iss. 7 — 1 April 2001

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×