{upsilon} Production at Fermilab Tevatron and LHC Energies

Journal Article · Fri Oct 10 04:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.101.152001· OSTI ID:21179795

Artoisenet, P; Maltoni, F ^[1]; Campbell, J ^[2]; Lansberg, J P ^[3]; Tramontano, F ^[4]

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1. Center for Particle Physics and Phenomenology (CP3), Universite Catholique de Louvain, B-1348 Louvain-la-Neuve (Belgium)
2. Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ (United Kingdom)
3. Institut fuer Theoretische Physik, Universitaet Heidelberg, D-69120 Heidelberg (Germany)
4. Dipartimento di Scienze Fisiche, Universita di Napoli Federico II, and INFN, Sezione di Napoli, I-80126 Napoli (Italy)

We update the theoretical predictions for direct {upsilon}(nS) hadroproduction in the framework of nonrelativistic QCD. We show that the next-to-leading order corrections in {alpha}{sub S} to the color-singlet transition significantly raise the differential cross section at high p{sub T} and substantially affect the polarization of the {upsilon}. 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 {alpha}{sub S}{sup 5} contributions, namely, those coming from {upsilon}(nS) associated with three light partons. The differential color-singlet cross section at {alpha}{sub S}{sup 5} 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 {upsilon}(nS) is longitudinal. We also present our predictions for {upsilon}(nS) production at the LHC.

• OSTI ID: 21179795
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 15 Vol. 101; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CERN LHC
COLOR MODEL
DIFFERENTIAL CROSS SECTIONS
FERMILAB TEVATRON
PARTICLE PRODUCTION
POLARIZATION
QUANTUM CHROMODYNAMICS