QCD corrections to Upsilon production via color-octet states at the Tevatron and LHC

Details QCD corrections to Upsilon production via color-octet states at the Tevatron and LHC QCD corrections to Upsilon production via color-octet states at the Tevatron and LHC

2010-09-20

arxiv.org/abs/1009.3839v1

Phys.Rev.D83:114021,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 10 Figures

Scientific paper

10.1103/PhysRevD.83.114021

The NLO QCD corrections to Upsilon production via S-wave color-octet states Upsilon(^1S_0^8,^3S_1^8) at the Tevatron and LHC is calculated. The K factors of total cross section (ratio of NLO to LO) are 1.313 and 1.379 for Upsilon(^1S_0^8) and Upsilon(^3S_1^8) at the Tevatron, while at the LHC they are 1.044 and 1.182, respectively. By fitting the experimental data from the D0, the matrix elements for S-wave color-octet states are obtained. And new predictions for Upsilon production are presented. The prediction for the polarization of inclusive Upsilon contains large uncertainty rising from the polarization of Upsilon from feed-down of chi_b. To further clarify the situation, new measurements on the production and polarization for direct Upsilon are expected.

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