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arXiv 1503.00005hep-phhep-thnucl-th
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NNLL的Higgs横动量分布及其理论误差

The Higgs Transverse Momentum Distribution at NNLL and its Theoretical Errors

Duff Neill, Ira Z. Rothstein, Varun Vaidya

摘要:

在这封信中,我们提出了由胶子融合产生的NNLL-NNLO横动量Higgs分布。在$p_\perp\ll m_H$机制中,我们在次到次到前导顺序处包括大日志的重新命名,然后匹配到靠近$p_\perp \sim m_h$的$α_s^2$固定顺序结果。通过利用快度重整化群(RRG),我们能够在小的、有序的$p_\perp$区和固定序区之间进行平滑的匹配。对结果的尺度依赖性进行了详细的讨论,包括对快度尺度依赖性的分析。我们的中心值不同于以前的结果,在过渡区以及尾部,由一个量,这是误差带之外。这种差异是由于RRG配置文件允许我们平滑地关闭重新缩放。

英文摘要:

In this letter, we present the NNLL-NNLO transverse momentum Higgs distribution arising from gluon fusion. In the regime $p_\perp\ll m_H$ we include the resummation of the large logs at next to next-to leading order and then match on to the $α_s^2$ fixed order result near $p_\perp \sim m_h$. By utilizing the rapidity renormalization group (RRG) we are able to smoothly match between the resummed, small $p_\perp$ regime and the fixed order regime. We give a detailed discussion of the scale dependence of the result including an analysis of the rapidity scale dependence. Our central value differs from previous results, in the transition region as well as the tail, by an amount which is outside the error band. This difference is due to the fact that the RRG profile allows us to smoothly turn off the resummation.

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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