加速器中微子作为介质中超子势的探测器
Accelerator neutrinos as a probe of in-medium hyperon potentials
中文总结 AI 辅助
研究利用带电流中微子相互作用产生超子来探测介质中超子势,通过StrangeMC模拟,由捕获的Λ份额等对UΛ和UΣ的响应进行预测,得出δUΛ≈6MeV ,UΣ受超子 - 核子截面限制。
中文摘要 AI 辅助
带电流(反)中微子相互作用在原子核内部产生Λ和Σ超子,使得超子末态相互作用成为研究中子星中超子出现的介质势的地面探测器。在StrangeMC模拟中,捕获的Λ份额、逃逸超子动量以及一个被K介子否决的Σ⁺标记在SBND和DUNE对UΛ和UΣ有单调响应。经低密度斜率边缘化预测,δUΛ≈6MeV,其系统误差与超核数据不同;UΣ受超子 - 核子截面限制。
英文摘要
Charged-current (anti)neutrino interactions create $Λ$ and $Σ$ hyperons \emph{inside} the nucleus, making hyperon final-state interactions a terrestrial probe of the in-medium potentials that govern hyperon onset in neutron stars. In the StrangeMC simulation the trapped-$Λ$ fraction, escaping hyperon momenta, and a kaon-vetoed $Σ^+$ tag respond monotonically to $U_Λ$ and $U_Σ$ at SBND and DUNE. Marginalised over the low-density slope, a forecast gives $δU_Λ\approx6\MeV$ with systematics distinct from hypernuclear data; $U_Σ$ is limited by hyperon--nucleon cross sections.