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arXiv 2104.12853hep-ex
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寻找在$\sqrt{s} =$ 13 TeV全强子末态衰变为顶夸克和W玻色子的重共振

Search for a heavy resonance decaying to a top quark and a W boson at $\sqrt{s} =$ 13 TeV in the fully hadronic final state

CMS Collaboration

摘要:

研究了在全强子末态中衰变为顶夸克和W玻色子的重共振。分析是使用质子-质子碰撞的数据,在13 TeV的质心能量,对应于137 fb的积分亮度光度$^{-1}$记录的CMS实验在大型强子对撞机。搜索的重点是重共振,其中每个顶夸克或W玻色子的衰变产物预计将被重建为具有不同子结构的单个大半径喷流。激发底夸克b* 的产生被用作设定重共振衰减到顶夸克和W玻色子的截面极限的基准。对于质量分别低于2.6、2.8和3.1 TeV的b* 夸克,左手、右手和类矢量手征的假设被排除在95%的置信水平之外。这是迄今为止对b* 夸克质量最严格的限制,将之前的最佳限制扩大了近两倍。

英文摘要:

A search for a heavy resonance decaying to a top quark and a W boson in the fully hadronic final state is presented. The analysis is performed using data from proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 137 fb$^{-1}$ recorded by the CMS experiment at the LHC. The search is focused on heavy resonances, where the decay products of each top quark or W boson are expected to be reconstructed as a single, large-radius jet with a distinct substructure. The production of an excited bottom quark, b*, is used as a benchmark when setting limits on the cross section for a heavy resonance decaying to a top quark and a W boson. The hypotheses of b* quarks with left-handed, right-handed, and vector-like chiralities are excluded at 95% confidence level for masses below 2.6, 2.8, and 3.1 TeV, respectively. These are the most stringent limits on the b* quark mass to date, extending the previous best limits by almost a factor of two.

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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