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arXiv · 0805.4751

QCD corrections to J/psi production via color octet states at Tevatron and LHC

Bin Gong·Xue Qian Li·Jian-Xiong Wang
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Abstract

The remarkable discrepancy between theory and data on the p_t distribution of J/psi polarization in the process pp -> J/psi+X has been standing as a puzzle for a long time. Our early work indicates that if only considering the color-singlet state, NLO corrections may drastically change the distribution, but are not sufficient to accommodate the data. The color-octet intermediate state was suggested to make up the gap. Therefore a direct motivation is to evaluate if the NLO corrections to the J/psi production via a color-octet can indeed remedy the problem. Unfortunately, our results show that even the NLO corrections to both color-singlet and octet states are accounted, the data cannot be understood yet in the framework of the present theory, but there, as observed, still a small window remains, namely a P-wave octet might substantially contribute.

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Bin Gong, Xue Qian Li, Jian-Xiong Wang. 2010-09-21. QCD corrections to J/psi production via color octet states at Tevatron and LHC. https://doi.org/10.1016/j.physletb.2009.02.026%2010.1016%2Fj.physletb.2010.09.031

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