Quarkonium polarization and the long distance matrix elements hierarchies using jet substructure

Lin Dai, Prashant Shrivastava

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


We investigate the quarkonium production mechanisms in jets at the LHC, using the fragmenting jet functions (FJF) approach. Specifically, we discuss the jet energy dependence of the J/ψ production cross section at the LHC. By comparing the cross sections for the different NRQCD production channels (S10[8], S31[8], P3J[8], and S31[1]), we find that at fixed values of energy fraction z carried by the J/ψ, if the normalized cross section is a decreasing function of the jet energy, in particular for z>0.5, then the depolarizing S10[8] must be the dominant channel. This makes the prediction made in [Baumgart et al., J. High Energy Phys. 11 (2014) 003JHEPFG1029-847910.1007/JHEP11(2014)003] for the FJF's also true for the cross section. We also make comparisons between the long distance matrix elements extracted by various groups. This analysis could potentially shed light on the polarization properties of the J/ψ production in high pT region.

Original languageEnglish
Article number036020
JournalPhysical Review D
Issue number3
StatePublished - 31 Aug 2017
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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