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Artoisenet P, Campbell J, Lansberg JP, et al. Upsilon production at Fermilab Tevatron and LHC energies. Phys Rev Lett. 2008;101(15):152001doi: 10.1103/PhysRevLett.101.152001.
Artoisenet, P., Campbell, J., Lansberg, J. P., Maltoni, F., & Tramontano, F. (2008). Upsilon production at Fermilab Tevatron and LHC energies. Physical review letters, 101(15), 152001. https://doi.org/10.1103/PhysRevLett.101.152001
Artoisenet, P, et al. "Upsilon production at Fermilab Tevatron and LHC energies." Physical review letters vol. 101,15 (2008): 152001. doi: https://doi.org/10.1103/PhysRevLett.101.152001
Artoisenet P, Campbell J, Lansberg JP, Maltoni F, Tramontano F. Upsilon production at Fermilab Tevatron and LHC energies. Phys Rev Lett. 2008 Oct 10;101(15):152001. doi: 10.1103/PhysRevLett.101.152001. Epub 2008 Oct 08. PMID: 18999591.
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Phys Rev Lett. 2008 Oct 10;101(15):152001. doi: 10.1103/PhysRevLett.101.152001. Epub 2008 Oct 08.

Upsilon production at Fermilab Tevatron and LHC energies.

Physical review letters

P Artoisenet, J Campbell, J P Lansberg, F Maltoni, F Tramontano

Affiliations

  1. Center for Particle Physics and Phenomenology (CP3), Université Catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium.

PMID: 18999591 DOI: 10.1103/PhysRevLett.101.152001

Abstract

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(S) to the color-singlet transition significantly raise the differential cross section at high p(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(S)(5) contributions, namely, those coming from Upsilon(nS) associated with three light partons. The differential color-singlet cross section at alpha(S)(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.

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