Studies of gluon TMDs and their evolution using quarkonium-pair production at the LHC
Studies of gluon TMDs and their evolution using quarkonium-pair production at the LHC
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DOI：
10.1140/epjc/s10052-020-7619-1
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发表时间：
2019-09
期刊：
影响因子：
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通讯作者：
F. Scarpa;D. Boer;M. G. Echevarria;J. Lansberg;C. Pisano;M. Schlegel
中科院分区：
文献类型：
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作者：
F. Scarpa;D. Boer;M. G. Echevarria;J. Lansberg;C. Pisano;M. Schlegel
- 在大型强子对撞机上产生的或对是研究胶子横动量分布（TMD）的一个很有前途的过程，但人们对TMD的了解仍然很少。在这篇文章中，我们改进了以前的结果，包括TMD演化的可观测量的计算，如对横动量谱和非极化质子内胶子的线极化所产生的不对称性。我们表明，由胶子极化产生的方位角不对称性减少相比，树水平的情况下，但仍然是可测量的大小（在5-10%的范围内）。这样的不对称性应该是可测量的现有数据集的对和未来的数据集的高亮度大型强子对撞机对。
- or-pair production at the LHC are promising processes to study the gluon transverse momentum distributions (TMDs) which remain very poorly known. In this article, we improve on previous results by including the TMD evolution in the computation of the observables such as the pair-transverse-momentum spectrum and asymmetries arising from the linear polarization of gluons inside unpolarized protons. We show that the azimuthal asymmetries generated by the gluon polarization are reduced compared to the tree level case but are still of measurable size (in the 5–10% range). Such asymmetries should be measurable in the available data sets ofpairs and in the future data sets of the high-luminosity LHC forpairs.