J/psi (psi') production at the Tevatron and LHC at O(α_s^4v^4) in nonrelativistic QCD

Yan-Qing Ma; Kai Wang; Kuang-Ta Chao

Paper

J/psi (psi') production at the Tevatron and LHC at O(α_s^4v^4) in nonrelativistic QCD

Abstract

We present a complete evaluation for

prompt production at the Tevatron and LHC at next-to-leading order in nonrelativistic QCD, including color-singlet, color-octet, and higher charmonia feeddown contributions. The short-distance coefficients of

at next-to-leading order are found to be larger than leading order by more than an order of magnitude but with a minus sign at high transverse momentum

. Two new linear combinations of color-octet matrix elements are obtained from the CDF data, and used to predict

production at the LHC, which agrees with the CMS data. The possibility of

dominance and the

polarization puzzle are also discussed.