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arXiv 2302.12802hep-ex
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在质子-质子碰撞中通过Higgs玻色子的双光子衰变模式寻找矢量样夸克T$'$ $\to$ tH($\sqrt{s}$ = 13 TeV)

Search for a vector-like quark T$'$ $\to$ tH via the diphoton decay mode of the Higgs boson in proton-proton collisions at $\sqrt{s}$ = 13 TeV

CMS Collaboration

AI总结:

本文首次利用Higgs玻色子双光子衰变模式,在138 fb$^{-1}$的13 TeV质子-质子碰撞数据中寻找电弱产生的矢量样夸克T$'$,在95%置信水平下排除了质量高达960 GeV的T$'$夸克产生。

摘要:

本文展示了对电弱产生并衰变为顶夸克和Higgs玻色子的矢量样夸克T$'$的寻找。该寻找基于在LHC上$\sqrt{s}$ = 13 TeV的质子-质子碰撞事件样本,对应138 fb$^{-1}$的积分亮度。这是首次利用Higgs玻色子衰变为一对光子的T$'$寻找。对于质量高达1.1 TeV的窄同位旋单态T$'$态,1-2%的优异双光子不变质量分辨率使得其灵敏度相比基于相同产生机制的先前寻找有所提高。在95%置信水平下,假设耦合强度$κ_\mathrm{T}$ = 0.25且相对衰变宽度$Γ/M_{\mathrm{T}'}$ $\lt$ 5%,排除了质量高达960 GeV的T$'$夸克的电弱产生。

英文摘要:

A search for the electroweak production of a vector-like quark T$'$, decaying to a top quark and a Higgs boson is presented. The search is based on a sample of proton-proton collision events recorded at the LHC at $\sqrt{s}$ = 13 TeV, corresponding to an integrated luminosity of 138 fb$^{-1}$. This is the first T$'$ search that exploits the Higgs boson decay to a pair of photons. For narrow isospin singlet T$'$ states with masses up to 1.1 TeV, the excellent diphoton invariant mass resolution of 1-2% results in an increased sensitivity compared to previous searches based on the same production mechanism. The electroweak production of a T$'$ quark with mass up to 960 GeV is excluded at 95% confidence level, assuming a coupling strength $κ_\mathrm{T}$ = 0.25 and a relative decay width $Γ/M_{\mathrm{T}'}$ $\lt$ 5%.

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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