Forward J / ψ plus J/ψ J / ψ and J / ψ plus ψ ' production with high-energy factorization

被引：0
|
作者：
Baranov, S. P. [1 ]
V. Lipatov, A. [2 ,3 ]
Malyshev, M. A. [2 ]
Prokhorov, A. A. [3 ]
Zhang, P. M. [4 ]
机构：
[1] PN Lebedev Inst Phys, Moscow 119991, Russia
[2] Lomonosov Moscow State Univ, Skobeltsyn Inst Nucl Phys, Moscow 119991, Russia
[3] Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia
[4] Sun Yat Sen Univ, Sch Phys & Astron, Zhuhai 519082, Peoples R China
来源：
PHYSICAL REVIEW D | 2024年 / 110卷 / 05期
基金：
中国国家自然科学基金;
关键词：
HEAVY-QUARK PRODUCTION; HADRONIC PRODUCTION; EVENT GENERATOR; MATRIX-ELEMENT; QCD COHERENCE; HELAC-ONIA; UPSILON; JETS; LHC;
D O I：
10.1103/PhysRevD.110.054001
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We calculate the cross sections of associated J/jr + jr' and J/jr + J/jr production in pp collisions at p = 13 TeV in the forward kinematic region. The high-energy factorization (kT-factorization) framework ffiffis supplemented with the Catani-Ciafaloni-Fiorani-Marchesini evolution of gluon densities in a proton is applied. We demonstrate that the latest data on J/jr + J/jr production and first experimental data on J/jr + jr' events taken very recently by the LHCb Collaboration can be described well by the color singlet terms and contributions from double parton scattering (DPS) with the standard choice for 6eff parameter. The relative production rate 6(J/jr + jr')/6(J/jr + J/jr) is found to be sensitive to the DPS terms as well as to feeddown contributions.
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页数：7
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