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arXiv 2305.02005hep-ex
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利用ATLAS探测器在$\sqrt{s} = 13$ TeV的$pp$碰撞中搜寻小位移μ子对

Search for pairs of muons with small displacements in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector

ATLAS Collaboration

AI总结:

利用ATLAS的139 fb$^{-1}$数据搜寻毫米级位移μ子对,填补大位移与瞬发轻子搜索之间的空白,未发现显著超出,并对长寿命smuon质量与寿命及新现象贡献设定了排除限。

摘要:

本文提出了一项寻找产生具有毫米级碰撞参数、电荷相反的μ子对的新现象的研究,使用了来自LHC上ATLAS探测器采集的139 fb$^{-1}$、$\sqrt{s} = 13$ TeV的$pp$碰撞数据。该搜索针对现有搜索之间的覆盖空白,即针对具有大位移轻子末态和瞬发轻子末态的搜索之间的空白。未观察到超出背景预期的显著超出,并对长寿命标量超对称μ子伴子(smuons)的质量设定了排除限,其寿命远低于此前位移μ子搜索所针对的寿命。在95%置信水平下,对于质量为100 GeV的smuon,排除其寿命低至1 ps;对于固有寿命为10 ps的情况,排除smuon质量高达520 GeV。最后,对新现象对信号区产额的贡献设定了与模型无关的限。

英文摘要:

A search new phenomena giving rise to pairs of opposite electrically charged muons with impact parameters in the millimetre range is presented, using 139 fb$^{-1}$ of $\sqrt{s} = 13$ TeV $pp$ collision data from the ATLAS detector at the LHC. The search targets the gap in coverage between existing searches targeting final states with leptons with large displacement and prompt leptons. No significant excess over the background expectation is observed and exclusion limits are set on the mass of long-lived scalar supersymmetric muon-partners (smuons) with much lower lifetimes than previously targeted by displaced muon searches. Smuon lifetimes down to 1 ps are excluded for a smuon mass of 100 GeV, and smuon masses up to 520 GeV are excluded for a proper lifetime of 10 ps, at 95% confidence level. Finally, model-independent limits are set on the contribution from new phenomena to the signal-region yields.

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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