论文标题
使用tau Lepton腐烂在巴巴尔搜索重型中性瘦素
Search for Heavy Neutral Leptons Using Tau Lepton Decays at BABAR
论文作者
论文摘要
本文提出了独立模型搜索，以搜索另外的，大多是无菌的，沉重的中性轻子（HNL），该搜索能够与标准模型$τ$中微子混合，混合强度为$ | u_ {τ4} |^{2} $，对应于pontendend pontecorvo-maki-maki-nakaagaagaagaaagaa的绝对正方形， \ babar〜实验的数据，总体集成的光度为$ 424〜 \ text {fb}^{ - 1} $，使用运动方法分析，该方法在HNL起源（其生命周期或衰减模式）背后没有任何假设。找不到明显的信号。 $ | u_ {τ4} |^{2} $在95 $ \％$置信度上的上限，取决于HNL质量假设，从$ 2.31 \ times 10^{ - 2} $到$ 5.04 \ times 10^{ - 6} $（均为所有不认可）（考虑到所有不认可），遍及$ 100^$ 100 <M____________00 〜\ text {mev}/c^{2} $;将更严格的限制放在更高的质量上。
This article presents a model independent search for an additional, mostly sterile, Heavy Neutral Lepton (HNL), that is capable of mixing with the Standard Model $τ$ neutrino with a mixing strength of $|U_{τ4}|^{2}$, corresponding to the absolute square of the extended Pontecorvo-Maki-Nakagawa-Sakata (PMNS) matrix element. Data from the \babar~ experiment, with a total integrated luminosity of $424~ \text{fb}^{-1}$, are analyzed using a kinematic approach that makes no assumptions on the model behind the origins of the HNL, its lifetime or decay modes. No significant signal is found. Upper limits on $|U_{τ4}|^{2}$ at the 95$\%$ confidence level, depend on the HNL mass hypothesis and vary from $2.31 \times 10^{-2}$ to $5.04 \times 10^{-6}$ (with all uncertainties considered), across the mass range $100 < m_{4} < 1300 ~\text{MeV}/c^{2}$; the more stringent limits being placed at higher masses.
