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arXiv 1402.6415hep-ph
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反常Higgs汤川耦合

Anomalous Higgs Yukawa Couplings

Sean Fraser, Ernest Ma

摘要:

在标准模型中,希格斯玻色子$h$根据众所周知的公式$(m_ψ/v) h \barψψ$耦合到夸克和带电轻子,其中$ψ$ =夸克(q)或轻子(l),并且$v$ = 246 GeV是它的真空期望值。假设$m_ψ$是辐射源,则有效的$h \barψψ$ Yukawa耦合将不完全是$m_ψ/v$。我们第一次定量地显示了这可能会如何移动所观察到的分支分数的$h \to \bar{b}b$和$h \to τ^+ τ^-$向上或向下。因此,在2015年恢复运行的大型强子对撞机上对希格斯衰变为费米子的精确测量可能是可能的新物理学的关键。

英文摘要:

In the standard model, the Higgs boson $h$ couples to the quarks and charged leptons according to the well-known formula $(m_ψ/v) h \barψψ$, where $ψ$ = quark (q) or lepton (l) and $v$ = 246 GeV is its vacuum expectation value. Suppose $m_ψ$ is of radiative origin instead, then the effective $h \barψψ$ Yukawa coupling will not be exactly $m_ψ/v$. We show for the first time quantitatively how this may shift the observed branching fraction of $h \to \bar{b}b$ and $h \to τ^+ τ^-$ upward or downward. Thus the precision measurements of Higgs decay to fermions at the Large Hadron Collider, due to resume operation in 2015, could be the key to possible new physics.

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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