Υ production at Fermilab Tevatron and LHC energies

Artoisenet, P., Campbell, J., Lansberg, J., Maltoni, F. and Tramontano, F. (2008) Υ production at Fermilab Tevatron and LHC energies. Physical Review Letters, 101(15), (doi:10.1103/PhysRevLett.101.152001)

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Publisher's URL: http://dx.doi.org/10.1103/PhysRevLett.101.152001

Abstract

We update the theoretical predictions for direct Υ(nS) hadroproduction in the framework of nonrelativistic QCD. We show that the next-to-leading order corrections in αS to the color-singlet transition significantly raise the differential cross section at high pT and substantially affect the polarization of the Υ. Motivated by the remaining gap between the next-to-leading order yield and the cross-section measurements at the Fermilab Tevatron, we evaluate the leading part of the αS5 contributions, namely, those coming from Υ(nS) associated with three light partons. The differential color-singlet cross section at αS5 is in substantial agreement with the data, so that there is no evidence for the need of color-octet contributions. Furthermore, we find that the polarization of the Υ(nS) is longitudinal. We also present our predictions for Υ(nS) production at the LHC.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Campbell, Dr John
Authors: Artoisenet, P., Campbell, J., Lansberg, J., Maltoni, F., and Tramontano, F.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review Letters
Publisher:American Physical Society
ISSN:0031-9007
ISSN (Online):1079-7114

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
481951Investigations in Quantum Chromodynamics and Physics Beyond the Standard ModelChristine DaviesScience & Technologies Facilities Council (STFC)ST/G00059X/1Physics and Astronomy