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arXiv 1504.07792hep-phhep-ex
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夸克味破坏对MSSM衰变$h^0(125GeV) \to c\bar{c}$的影响

Impact of quark flavor violation on the decay $h^0(125GeV) \to c\bar{c}$ in the MSSM

K. Hidaka, A. Bartl, H. Eberl, E. Ginina, W. Majerotto

摘要:

在$\overline{\rm DR}$重整化方案下,计算了含夸克味破坏(QFV)的MSSM中$h^0 \to c \bar{c}$的衰变宽度.我们研究了$\tilde{c}-\tilde{t}$混合的影响,考虑到从B介子数据的QFV的约束。我们发现,完整的单圈校正的衰减宽度$Γ(h^0 \to c \bar{c})$是非常敏感的MSSM QFV参数。在$\tilde{c}_{L,R}-\tilde{t}_{L,R}$混合较大的情况下,$Γ(h^0 \to c \bar{c})$可以与其SM值相差多达$\sim \pm 35\%$。在估计了宽度的不确定性之后,我们得出结论,在未来的$e^+ e^-$对撞机如ILC上观察这些QFV超对称效应是可能的。

英文摘要:

We compute the decay width of $h^0 \to c \bar{c}$ in the MSSM with quark flavor violation (QFV) at full one-loop level in the $\overline{\rm DR}$ renormalization scheme. We study the effects of $\tilde{c}-\tilde{t}$ mixing, taking into account the constraints on QFV from the B meson data. We find that the full one-loop corrected decay width $Γ(h^0 \to c \bar{c})$ is very sensitive to the MSSM QFV parameters. In a scenario with large $\tilde{c}_{L,R}-\tilde{t}_{L,R}$ mixing, $Γ(h^0 \to c \bar{c})$ can differ up to $\sim \pm 35\%$ from its SM value. After estimating the uncertainties of the width, we conclude that an observation of these QFV SUSY effects is possible at a future $e^+ e^-$ collider such as ILC.

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