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

Abstract

We present a complete evaluation for $\text{jpsi}(\text{psip})$ 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 $\text{pj}$ 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 $p_T$. Two new linear combinations of color-octet matrix elements are obtained from the CDF data, and used to predict $\text{jpsi}$ production at the LHC, which agrees with the CMS data. The possibility of $\text{sa}$ dominance and the $\text{jpsi}$ polarization puzzle are also discussed.

Comments: Version published in PRL, 4 pages, 4 figures