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arXiv 1810.08970hep-ph
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轻子对撞机上重中微子的胖喷流特征

Fat Jet Signature of a Heavy Neutrino at Lepton Collider

Sabyasachi Chakraborty, Manimala Mitra, Sujay Shil

摘要:

我们探讨了在拟建的$e^+e^-$对撞机上发现超重中微子的可能性,给出了$\sqrt{s}=1.4$ TeV和3 TeV两种不同的能量.我们考虑了重中微子通过$s$和$t$通道过程的产生,以及随后导致半轻子末态的瞬发衰变,以及显著的能量丢失。对于我们选择的质量,重中微子衰变产生的规范玻色子被高度提升,导致脂肪喷流。我们进行了详细的信号和背景分析$e^{\pm}+j_{\rm{fat}}+\cancel{E}_{T}$的最终状态,使用基于切割和多变量技术。我们表明,在收集了$\mathcal{L}=500$ $\rm{fb}^{-1}$的数据后,可以在$e^{+}e^{-}$对撞机上探测到质量为$600-2700$ GeV的重中微子和活性-无菌混合$|V_{eN}|^2 \sim 10^{-5}$,具有$5σ$意义。我们发现,在$e^{+}e^{-}$对撞机的灵敏度达到一个数量级的提高相比,大型强子对撞机。

英文摘要:

We explore the discovery prospect of a very heavy neutrino at the proposed $e^+e^-$ collider for two different c.m.energies $\sqrt{s}=1.4$ TeV and 3 TeV. We consider production of heavy neutrino via $s$ and $t$-channel processes, and its subsequent prompt decays leading to semi-leptonic final states, along with significant missing energy. For our choice of masses, the gauge boson produced from heavy neutrino decay is highly boosted, leading to a fat-jet. We carry out a detail signal and background analysis for $e^{\pm}+j_{\rm{fat}}+\cancel{E}_{T}$ final state using both cut based and multivariate techniques. We show that a heavy neutrino of mass $600-2700$ GeV and active-sterile mixing $|V_{eN}|^2 \sim 10^{-5}$ can be probed with $5σ$ significance at $e^{+}e^{-}$ collider after collecting $\mathcal{L}=500$ $\rm{fb}^{-1}$ of data. We find the sensitivity reach at $e^{+}e^{-}$ collider is order of magnitude enhanced as compared to LHC.

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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