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

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

2010-09-19

arxiv.org/abs/1009.3655v2

Phys.Rev.Lett.106:042002,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

Version published in PRL, 4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.106.042002

We present a complete evaluation for $\jpsi(\psip)$ 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 $\pj$ 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 $\jpsi$ production at the LHC, which agrees with the CMS data. The possibility of $\sa$ dominance and the $\jpsi$ polarization puzzle are also discussed.

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