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arXiv 0708.0916hep-ph
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希格斯粒子在NNLO衰变为胶子

Higgs Decay to Gluons at NNLO

Marco Schreck, Matthias Steinhauser

摘要:

本文给出了中等质量范围内希格斯玻色子部分衰变宽度$H\to gg$的次-次-主导阶修正的解析计算。我们对$M_H\ll 2M_t$应用一个渐近展开式,并计算展开式中的三项。主导项证实了文献中的结果。我们认为我们的结果等价于直到$M_H\approx M_t$的精确计算。对于质量为120 GeV的希格斯玻色子,功率抑制项导致次-次-首阶系数的修正约为9%。

英文摘要:

We present an analytical calculation of the next-to-next-to-leading order corrections to the partial decay width $H\to gg$ for a Higgs boson in the intermediate mass range. We apply an asymptotic expansion for $M_H\ll 2M_t$ and compute three terms in the expansion. The leading term confirms the results present in the literature. It is argued that our result is equivalent to an exact calculation up to $M_H\approx M_t$. For a Higgs boson mass of 120 GeV the power-suppressed terms lead to corrections of about 9% in the next-to-next-to-leading order coefficient.

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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