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arXiv · 1702.03287

$J/ψ$ production and polarization within a jet

Zhong-Bo Kang·Jian-Wei Qiu·Felix Ringer·Hongxi Xing·Hong Zhang
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Abstract

We study the production and polarization of $J/ψ$ mesons within a jet in proton-proton collisions at the LHC. We define the $J/ψ$-jet fragmentation function as a ratio of differential jet cross sections with and without the reconstructed $J/ψ$ in the jet. We demonstrate that this is a very useful observable to help explore the $J/ψ$ production mechanism, and to differentiate between different NRQCD global fits based on inclusive $J/ψ$ cross sections. Furthermore, we propose to measure the polarization of $J/ψ$ mesons inside the jet, which can provide even more stringent constraints for the heavy quarkonium production mechanism.

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Zhong-Bo Kang, Jian-Wei Qiu, Felix Ringer, Hongxi Xing, Hong Zhang. 2017-07-18. $J/ψ$ production and polarization within a jet. https://doi.org/10.1103/physrevlett.119.032001

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