arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1112.4606hep-ph
收藏

次次领先对数级顶夸克对产生截面

The top-quark pair production cross section at next-to-next-to-leading logarithmic order

M. Beneke, P. Falgari, S. Klein, C. Schwinn

摘要:

我们提出了预测的总ttbar生产截面sigma_ttbar在Tevatron和LHC,其中包括通过下一个到下一个到领先的对数阶,和ttbar的束缚态的贡献的软微扰和库仑奇异性的remmation。在Tevatron和LHC中,恢复效应约为次领先阶结果的8%,质量中心能量为7 TeV。它们导致理论不确定性的显著降低。当m_t=173.3 GeV时,在Tevatron上得到σ_ttbar=7.22^{+0.31+0.71}-0.47-0.55} pb,在LHC上得到σ_ttbar=162.6^{+7.4+15.4}-7.5-14.7},与最新的实验测量值符合得很好。

英文摘要:

We present predictions for the total ttbar production cross section sigma_ttbar at the Tevatron and LHC, which include the resummation of soft logarithms and Coulomb singularities through next-to-next-to-leading logarithmic order, and ttbar bound-state contributions. Resummation effects amount to about 8 % of the next-to-leading order result at Tevatron and about 3 % at LHC with 7 TeV centre-of-mass energy. They lead to a significant reduction of the theoretical uncertainty. With m_t=173.3 GeV, we find sigma_ttbar=7.22^{+0.31+0.71}_{-0.47-0.55} pb at Tevatron and sigma_ttbar=162.6^{+7.4+15.4}_{-7.5-14.7} at the LHC, in good agreement with the latest experimental measurements.

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。

↑