基于高能因子分解的 $J/\psi + J/\psi$ 和 $J/\psi + \psi'$ 生产

S. P. Baranov; A. V. Lipatov; M. A. Malyshev; A. A. Prokhorov; P. M. Zhang

基于高能因子分解的 $J/\psi + J/\psi$ 和 $J/\psi + \psi'$ 生产

高能物理 - 唯象学 2024-05-29 v1

作者: S. P. Baranov , A. V. Lipatov , M. A. Malyshev , A. A. Prokhorov , P. M. Zhang

摘要

We calculate the cross sections of associated $J/\psi + \psi'$ and $J/\psi + J/\psi$ production in $pp$ collisions at $\sqrt s = 13$ TeV in the forward kinematic region. The High Energy Factorization ( $k_T$ -factorization) framework supplemented with the Catani-Ciafaloni-Fiorani-Marchesini evolution of gluon densities in a proton is applied. We demonstrate that latest data on $J/\psi + J/\psi$ production and first experimental data on $J/\psi + \psi'$ events taken very recently by the LHCb Collaboration can be described well by the color singlet terms and contributions from the double parton scattering (DPS) with the standard choice for $\sigma_{\rm eff}$ parameter. The relative production rate $\sigma(J/\psi + \psi')/\sigma(J/\psi + J/\psi)$ is found to be sensitive to the DPS terms as well as to feeddown contributions.

关键词

高能因子分解 $J/\psi$ 生产双强子散射单色态 LHCb

引用

@article{arxiv.2405.18054,
  title  = {Forward $J/\psi + J/\psi$ and $J/\psi + \psi^\prime$ production with High Energy Factorization},
  author = {S. P. Baranov and A. V. Lipatov and M. A. Malyshev and A. A. Prokhorov and P. M. Zhang},
  journal= {arXiv preprint arXiv:2405.18054},
  year   = {2024}
}

基于高能因子分解的 $J/\psi + J/\psi$ 和 $J/\psi + \psi'$ 生产

摘要

关键词

引用

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