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arXiv 2105.04530hep-phhep-ex
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在正负电子对撞机上确定希格斯玻色子的宽度

Determining Higgs boson width at electron-positron colliders

Bin Yan

摘要:

探测希格斯粒子的宽度$Γ_h$是检验希格斯粒子性质的关键。在这项工作中,我们建议测量$Γ_h$在$e^+e^-$对撞机与模型无关的分析下的标准模型有效场论框架。我们证明,利用截面测量$e^+e^-\to Zh$,$e^+e^-\to ν_e\barν_eh$生产和希格斯衰变分支比$h\to WW^*/ZZ^*/γγ$,可以确定$Γ_h$在百分之一的质量中心能量$\sqrt{s}=250$和350 GeV和积分亮度$5~{\rm ab}^{-1}$。这个结论不依赖于费米子汤川相互作用的假设。我们进一步应用这个结果来约束费米子汤川耦合,它表明耦合可以很好地约束。

英文摘要:

Probing Higgs width $Γ_h$ is critical to test the Higgs properties. In this work we propose to measure $Γ_h$ at the $e^+e^-$ collider with a model-independent analysis under the Standard Model Effective Field Theory framework. We demonstrate that making use of the cross section measurements from $e^+e^-\to Zh$, $e^+e^-\to ν_e\barν_eh$ production and Higgs decay branching ratios $h\to WW^*/ZZ^*/γγ$, one could determine $Γ_h$ at a percentage level with a center of mass energy $\sqrt{s}=250$ and 350 GeV and integrated luminosity $5~{\rm ab}^{-1}$. This conclusion would not depend on the assumption of the fermion Yukawa interactions. We further apply this result to constrain the fermion Yukawa couplings and it shows that the couplings could be well constrained.

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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