期刊
PHYSICAL REVIEW D
卷 92, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.92.111502
关键词
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资金
- nuclear theory group at the Lawrence Berkeley National Laboratory
- Natural Science Foundation of China [11575070]
- Center of Nuclear Matter Science at Central China Normal University
We investigate the low transverse momentum heavy quarkonium (J/psi, Upsilon) productions in the forward rapidity region of pp and pA collisions at the LHC as an important probe to the transverse momentum tomography of the gluons in hadrons in the color glass condensate (CGC) framework. By implementing the Sudakov resummation consistently in the CGC formalism, we achieve an excellent agreement between the improved CGC calculations and the LHC data. We show that both the small-x and the Sudakov effects are essential for a complete description of heavy quarkonium productions in the low transverse momentum region. This provides a solid foundation to study the small-x gluon saturation in a big nucleus with the future pA programs at the LHC.
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