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arXiv 1507.02565hep-phhep-ex
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NNLL + NNLO产生矢量玻色子对的横动量修正

Transverse-momentum resummation for vector-boson pair production at NNLL+NNLO

Massimiliano Grazzini, Stefan Kallweit, Dirk Rathlev, Marius Wiesemann

摘要:

本文研究了强子碰撞中产生的$p_T$和$W^+W^-$玻色子对的横动量分布。在小的$p_T$下,多重软胶子辐射的热力学增强贡献在QCD微扰理论中被表示到所有的阶。在中间和大值的$p_T$,我们一贯结合recrimation与已知的固定顺序的结果。我们利用目前最先进的微扰信息:下一个到下一个到领先的对数重算结合下一个到下一个到领先的固定顺序计算。在$p_T$上积分后,我们恢复了包含截面的已知次-次-首阶结果。我们目前在大型强子对撞机的数值结果,以及相应的不确定性的估计。我们还研究了快度依赖的$p_T$频谱,我们认为$p_T$的效率在不同的顺序的扰动和固定阶微扰理论。

英文摘要:

We consider the transverse-momentum ($p_T$) distribution of $ZZ$ and $W^+W^-$ boson pairs produced in hadron collisions. At small $p_T$, the logarithmically enhanced contributions due to multiple soft-gluon emission are resummed to all orders in QCD perturbation theory. At intermediate and large values of $p_T$, we consistently combine resummation with the known fixed-order results. We exploit the most advanced perturbative information that is available at present: next-to-next-to-leading logarithmic resummation combined with the next-to-next-to-leading fixed-order calculation. After integration over $p_T$, we recover the known next-to-next-to-leading order result for the inclusive cross section. We present numerical results at the LHC, together with an estimate of the corresponding uncertainties. We also study the rapidity dependence of the $p_T$ spectrum and we consider $p_T$ efficiencies at different orders of resummed and fixed-order perturbation theory.

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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