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arXiv 2202.08273hep-phhep-ex
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希格斯玻色子通过$c$ -夸克碎裂衰变为Charmonia

Higgs boson decay to charmonia via $c$-quark fragmentation

Tao Han, Adam K. Leibovich, Yang Ma, Xiao-Ze Tan

摘要:

在非相对论QCD框架下,利用粲夸克碎裂机制计算了色单重态和色八重态的希格斯玻色子到$J/ψ$和$η_c$的衰变分支分数.衰变速率由粲夸克Yukawa耦合控制,不像衰变$H\to J/ψ+ γ$,它是由$γ^*$ - $J/ψ$混合控制的。我们发现,对于$H\to c{\bar c}+J/ψ$,衰变分支分数约为$2 \times 10^{-5}$,对于$H\to c{\bar c}+η_c$,衰变分支分数约为$6 \times 10^{-5}$.本文评述了在高亮度LHC上寻找希格斯玻色子到$J/ψ$跃迁的前景,以检验粲夸克汤川耦合。

英文摘要:

We calculate the decay branching fractions of the Higgs boson to $J/ψ$ and $η_c$ via the charm-quark fragmentation mechanism for the color-singlet and color-octet states in the framework of non-relativistic QCD. The decay rates are governed by the charm-quark Yukawa coupling, unlike the decay $H\to J/ψ+ γ$, which is dominated by the $γ^*$-$J/ψ$ mixing. We find that the decay branching fractions can be about $2 \times 10^{-5}$ for $H\to c{\bar c}+J/ψ$, and $6 \times 10^{-5}$ for $H\to c{\bar c}+η_c$. We comment on the perspective of searching for the Higgs boson to $J/ψ$ transition at the High-Luminosity LHC for testing the charm-quark Yukawa coupling.

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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