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arXiv 1802.06149hep-ex
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在$\sqrt{s} =$ 8 TeV质子-质子碰撞中寻找b标记的双射流质谱中的窄共振

Search for narrow resonances in the b-tagged dijet mass spectrum in proton-proton collisions at $\sqrt{s} =$ 8 TeV

CMS Collaboration

摘要:

利用能量为$\sqrt{s} =$ 8 TeV,积分亮度为19.7 fb $^{-1}$的质子-质子碰撞数据,对衰减到底夸克-反夸克对的窄共振进行了研究.通过利用识别来自底夸克的喷流的触发器,将搜索扩展到比在LHC中衰减为喷流对的共振的典型搜索中达到的质量更低的质量。没有观察到显著超出背景预测的事件。限制的产品上的截面和分支分数底夸克自旋0,1,和2共振在325-1200 GeV的质量范围。这些结果显着改善的限制共振衰减到射流对在325-500 GeV的质量范围。

英文摘要:

A search for narrow resonances decaying to bottom quark-antiquark pairs is presented, using a data sample of proton-proton collisions at $\sqrt{s} =$ 8 TeV corresponding to an integrated luminosity of 19.7 fb$^{-1}$. The search is extended to masses lower than those reached in typical searches for resonances decaying into jet pairs at the LHC, by taking advantage of triggers that identify jets originating from bottom quarks. No significant excess of events is observed above the background predictions. Limits are set on the product of cross section and branching fraction to bottom quarks for spin 0, 1, and 2 resonances in the mass range of 325-1200 GeV. These results significantly improve on the limits for resonances decaying into jet pairs in the 325-500 GeV mass range.

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