ATLAS searches for di-Higgs production at 13 TeV and prospects for HL-LHC
ATLAS searches for di-Higgs production at 13 TeV and prospects for HL-LHC
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DOI：
10.1088/1402-4896/ab9f78
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发表时间：
2020-06
期刊：
影响因子：
2.9
通讯作者：
Y. Sano
中科院分区：
文献类型：
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作者：
Y. Sano
报道了在LHC的ATLAS实验中产生13 TeV的Higgs玻色子对的最新结果，包括6种不同衰变模式的组合。结果包括bb <$<$τ−τ+、bb <$$> bb <$、bb <$γγ、bb <$WW、WWWW和WWγγ终态，它们被解释为对SM的敏感性和对κ λ的限制，κ λ是三重希格斯相互作用强度的标度。对di-Higgs产生横截面的最严格约束设定为SM横截面的6.9倍，并且在95%的置信水平下，κ λ约束在-5-12范围内。在bb最终状态下进行了一次专门用于矢量-玻色子-融合生产的新搜索。相对于标准模型的期望值，没有观察到显著的过量，并且还提供了希格斯玻色子对和两个矢量玻色子之间的耦合的解释：标准模型期望值κ 2 V <-0.56和2.89<κ 2 V的耦合值在95%的置信水平下被排除。展望了在高亮度LHC上测试希格斯粒子自耦合的前景。
The latest results on production of Higgs boson pairs at 13 TeV by the ATLAS experiment at LHC are reported, including a combination of six different decay modes. Results include bb¯τ−τ+ , bb¯bb¯ , bb¯γγ , bb¯WW , WWWW and WWγγ final states, and they are interpreted both in terms of sensitivity to the SM and as limits on κ λ , a scaling of the triple-Higgs interaction strength. The most stringent constraint on di-Higgs production cross-section is set at 6.9 times SM cross-section and κ λ is constrained in the range −5–12 at 95% confidence level. A new search dedicated to the Vector-Boson-Fusion production was performed in the bb¯bb¯ final state. No significant excess, relative to the background-only Standard Model expectation, is observed and interpretation in terms of the coupling between a Higgs boson pair and two vector bosons is also provided: coupling values normalized to the Standard Model expectation of κ2V<−0.56 and 2.89<κ2V are excluded at the 95% confidence level. Future prospects of testing the Higgs self-couplings at the High Luminosity LHC are also reported.