Impact of η(c) hadroproduction data on charmonium production and polarization within the nonrelativistic QCD framework

Physical Review Letters
Hong-Fei ZhangRong Li

Abstract

With the recent LHCb data on η_{c} production and based on heavy quark spin symmetry, we obtain the long-distance matrix elements for both η_{c} and J/ψ productions, among which, the color-singlet one for η_{c} is obtained directly by the fit of experiment for the first time. Using our long-distance matrix elements, we can provide good description of the η_{c} and J/ψ hadroproduction measurements. Our predictions on J/ψ polarization are in good agreement with the LHCb data, explain most of the CMS data, and pass through the two sets of CDF measurements in the medium p_{t} region. Considering all the possible uncertainties carefully, we obtained quite narrow bands of the J/ψ polarization curves.

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Citations

Jul 30, 2016·The European Physical Journal. C, Particles and Fields·A AndronicP Zhuang
Aug 5, 2017·Physical Review Letters·Reggie BainAdam K Leibovich

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