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arXiv 1202.2260hep-phhep-ex
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LHC的夸克和胶子生产的NLL软和库仑再结晶

NLL soft and Coulomb resummation for squark and gluino production at the LHC

P. Falgari, C. Schwinn, C. Wever

摘要:

我们提出了在大型强子对撞机上夸克和胶子对产生的总截面的预测,包括停止-反停止产生过程。我们的计算补充了完整的固定阶非线性光学预测与重申的阈值和库仑奇点在下一个领先的对数(NLL)的准确性,包括束缚态效应。高阶库仑项的数值效应可以和软胶子修正一样大,甚至更大。对于一个选择的基准点,从2010-2012年大型强子对撞机运行的数据访问,重申导致总的包容夸克和胶子生产截面在15- 30%的范围内的增强。对于个别的胶子生产过程,修正可能要大得多。硬散射截面预测的理论不确定性通常降低到10%的水平。

英文摘要:

We present predictions of the total cross sections for pair production of squarks and gluinos at the LHC, including the stop-antistop production process. Our calculation supplements full fixed-order NLO predictions with resummation of threshold logarithms and Coulomb singularities at next-to-leading logarithmic (NLL) accuracy, including bound-state effects. The numerical effect of higher-order Coulomb terms can be as big or larger than that of soft-gluon corrections. For a selection of benchmark points accessible with data from the 2010-2012 LHC runs, resummation leads to an enhancement of the total inclusive squark and gluino production cross section in the 15-30 % range. For individual production processes of gluinos, the corrections can be much larger. The theoretical uncertainty in the prediction of the hard-scattering cross sections is typically reduced to the 10 % level.

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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