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arXiv 1808.01899hep-ex
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使用ATLAS探测器寻找衰变为同号$W$玻色子对的双电荷标量玻色子

Search for doubly charged scalar bosons decaying into same-sign $W$ boson pairs with the ATLAS detector

ATLAS Collaboration

摘要:

研究了衰变为$W$玻色子对的双荷标量玻色子。它使用了质子-质子碰撞的数据样本,对应于2015年和2016年在LHC的ATLAS探测器以13 TeV的质心能量收集的36.1 fb $^{-1}$的积分亮度。这种搜索是由一个模型,其中包括通过标量三重希格斯扇区的扩展,导致了丰富的现象,包括双电荷标量玻色子$H^{\pm\pm}$。这些玻色子在质子-质子碰撞中成对产生,并主要衰变为电弱规范玻色子$H^{\pm\pm}\to W^\pm W^\pm$。实验签名与几个轻子,失踪的横向能量和喷流进行了探讨。对于质量在200 - 220 GeV之间的$H^{\pm\pm}$玻色子,在95%的置信水平下排除了基准模型的参数空间。

英文摘要:

A search for doubly charged scalar bosons decaying into $W$ boson pairs is presented. It uses a data sample from proton-proton collisions corresponding to an integrated luminosity of 36.1 fb$^{-1}$ collected by the ATLAS detector at the LHC at a centre-of-mass energy of 13 TeV in 2015 and 2016. This search is guided by a model that includes an extension of the Higgs sector through a scalar triplet, leading to a rich phenomenology that includes doubly charged scalar bosons $H^{\pm\pm}$. Those bosons are produced in pairs in proton-proton collisions and decay predominantly into electroweak gauge bosons $H^{\pm\pm}\to W^\pm W^\pm$. Experimental signatures with several leptons, missing transverse energy and jets are explored. No significant deviations from the Standard Model predictions are found. The parameter space of the benchmark model is excluded at 95% confidence level for $H^{\pm\pm}$ bosons with masses between 200 and 220 GeV.

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