论文标题
在$ \ sqrt {s} = 13 $ tev $ pp $与Atlas检测器碰撞相撞的情况
Search for heavy neutral leptons in decays of $W$ bosons using a dilepton displaced vertex in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector
论文作者
论文摘要
搜索了139 fb $^{ - 1} $ $ \ sqrt {s} = 13 $ tev $ pp $ collision collision collision collision collision collision collision collision collider的搜索，以139 fb $^{ - 1} $搜索139 fb $^{ - 1} $中的长寿，中性的重物（$ \ MATHCAL {N} $）。 $ \ MATHCAL {N} $是通过$ W \ rightArrow \ Mathcal {N}μ$或$ W \ rightArrow \ Mathcal {N} E $生产的，并腐烂了两个带电的leptons和一个中微子，形成一个流离失所的Verterex。 $ \ MATHCAL {N} $质量用于区分信号和背景。未观察到任何信号，并且在$ \ nathdned中微子状态的平方混合参数上设置为$ \ MATHCAL {N} $ 3 $ 3 $ 3 $ GEV $ <m _ {\ MATHCAL {\ MATHCAL {N}} <15 $ GEV。对于正常中微子和倒数中微子质量层次结构的中微子风味振荡结果，首次为单中微子风味振荡结果提供了单品味和多叶子混合方案的限制。
A search for a long-lived, heavy neutral lepton ($\mathcal{N}$) in 139 fb$^{-1}$ of $\sqrt{s}=13$ TeV $pp$ collision data collected by the ATLAS detector at the Large Hadron Collider is reported. The $\mathcal{N}$ is produced via $W \rightarrow \mathcal{N} μ$ or $W \rightarrow \mathcal{N} e$ and decays into two charged leptons and a neutrino, forming a displaced vertex. The $\mathcal{N}$ mass is used to discriminate between signal and background. No signal is observed, and limits are set on the squared mixing parameters of the $\mathcal{N}$ with the left-handed neutrino states for the $\mathcal{N}$ mass range $3$ GeV $< m_{\mathcal{N}} < 15$ GeV. For the first time, limits are given for both single-flavor and multiflavor mixing scenarios motivated by neutrino flavor oscillation results for both the normal and inverted neutrino-mass hierarchies.
