arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2407.07546hep-ex
收藏

利用ATLAS探测器在66至110 GeV质量范围内的pp碰撞数据搜索双光子共振态

Search for diphoton resonances in the 66 to 110 GeV mass range using $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

ATLAS Collaboration

AI总结:

利用ATLAS探测器在13 TeV碰撞数据中搜索66-110 GeV范围内的双光子共振态,采用多元分析技术提高灵敏度,未发现显著超额,设定了不同模型下的质量依赖上限。

摘要:

利用在大型强子对撞机上产生的、由ATLAS探测器收集的、根号s等于13 TeV的质子-质子碰撞数据,进行了在66至110 GeV质量范围内的轻型自旋为0的玻色子衰变成两个光子的搜索。采用多元分析技术定义事件类别,以提高对超出标准模型的新共振态的灵敏度。在双光子不相容质量谱中,进行了模型无关的通用自旋为0粒子搜索以及模型依赖的额外低质量Higgs玻色子搜索。在两种搜索中均未观察到显著的超额。在模型无关的情况下,在8 fb到53 fb的质量依赖上限上设定了 fiducial 截面乘以双光子分支比。同样,在模型依赖的情况下,设定了总截面乘以双光子分支比作为函数的上限,范围为19 fb到102 fb。

英文摘要:

A search is performed for light, spin-0 bosons decaying into two photons in the 66 to 110 GeV mass range, using 140 fb$^{-1}$ of proton-proton collisions at $\sqrt{s}=13$ TeV produced by the Large Hadron Collider and collected by the ATLAS detector. Multivariate analysis techniques are used to define event categories that improve the sensitivity to new resonances beyond the Standard Model. A model-independent search for a generic spin-0 particle and a model-dependent search for an additional low-mass Higgs boson are performed in the diphoton invariant mass spectrum. No significant excess is observed in either search. Mass-dependent upper limits at the $95\%$ confidence level are set in the model-independent scenario on the fiducial cross-section times branching ratio into two photons in the range of 8 fb to 53 fb. Similarly, in the model-dependent scenario upper limits are set on the total cross-section times branching ratio into two photons as a function of the Higgs boson mass in the range of 19 fb to 102 fb.

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。

↑