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arXiv 2008.07378hep-phhep-th
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在LHC的半硬反应中狩猎BFKL

Hunting BFKL in semi-hard reactions at the LHC

Francesco Giovanni Celiberto

摘要:

通过一系列的唯象分析,证明了由BFKL方法得到的计算结果与QCD半硬区的实验数据之间的一致性。然而,最近有人指出,同样的数据可能同时出现在基于DGLAP的固定顺序计算中,但尚未及时解决。利用结合CMS和CASTOR探测器的接受度获得的丰富配置,我们给出了三个不同半硬过程的截面、方位角相关性和方位角分布的完全次领先对数近似结果,每个过程都具有独特的最终状态排他性。然后,利用不相交的间隔的横向动量的发射对象,即$κ$-窗口,我们清楚地强调如何高能量mammed和固定顺序驱动的预测半硬敏感的观测量可以果断地区分在LHC的当前和即将到来的分析的典型的运动学范围。同时,本文还对尺度优化问题进行了探讨,并对由于使用不同的PDF和FF集而带来的不确定性进行了适当的处理。最后,简要概述了JETHAD,最近开发的数值工具,适用于计算的包容性半硬反应。

英文摘要:

The agreement between calculations inspired by the resummation of energy logarithms, known as BFKL approach, and experimental data in the semi-hard sector of QCD has become manifest after a wealthy series of phenomenological analyses. However, the contingency that the same data could be concurrently portrayed at the hand of fixed-order, DGLAP-based calculations, has been pointed out recently, but not yet punctually addressed. Taking advantage of the richness of configurations gained by combining the acceptances of CMS and CASTOR detectors, we give results in the full next-to-leading logarithmic approximation of cross sections, azimuthal correlations and azimuthal distributions for three distinct semi-hard processes, each of them featuring a peculiar final-state exclusiveness. Then, making use of disjoint intervals for the transverse momenta of the emitted objects, i.e. $κ$-windows, we clearly highlight how high-energy resummed and fixed-order driven predictions for semi-hard sensitive observables can be decisively discriminated in the kinematic ranges typical of current and forthcoming analyses at the LHC. The scale-optimization issue is also introduced and explored, while the uncertainty coming from the use of different PDF and FF set is deservedly handled. Finally, a brief overview of JETHAD, a numerical tool recently developed, suited for the computation of inclusive semi-hard reactions is provided.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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