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)

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 α_S 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 α_S⁵ contributions, namely, those coming from Υ(nS) associated with three light partons. The differential color-singlet cross section at α_S⁵ 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

Project Code	Award No	Project Name	Principal Investigator	Funder's Name	Funder Ref	Lead Dept
48195	1	Investigations in Quantum Chromodynamics and Physics Beyond the Standard Model	Christine Davies	Science & Technologies Facilities Council (STFC)	ST/G00059X/1	Physics and Astronomy