论文标题
在存在无菌中微子的存在和使用液体氩检测器的八分化变性的情况下的物质效应
Matter effect in presence of a sterile neutrino and resolution of the octant degeneracy using a liquid argon detector
论文作者
论文摘要
LSND等实验的结果，以及小型酮暗示可能存在额外的EV量表无菌中微子。这种中微子的添加将显着影响标准的三种风味中微子振荡。特别是，由于新的无菌参数，它可能会导致额外的归化性。在我们的工作中，我们研究了如何通过将无菌中微子引入标准中微子振荡框架来影响中微子混合角$θ_{23} $的八分之一的灵敏度。在分析中，我们使用$δ_{21} $（最小的质量平方差）在分析上计算出无菌中微子的振荡概率为零。我们使用这些概率来分析不同基准的分析性脱落。我们介绍了使用液体氩时间投影室（LARTPC）对$θ_{23} $八分之一的敏感性的结果。我们还使用相同的LARTPC检测器使用大气中微子来获得八分之一的灵敏度，而无需任何电荷识别能力。此外，我们在氩气中还包括粘合捕获的电荷标记能力，该标记能力可以区分鼻中中微子和抗肿瘤事件。还描绘了类似的实验设置中梁和大气中微子的联合灵敏度。我们观察到，通过结合来自梁和大气中微子的模拟数据（包括穆斯的电荷ID），对$θ_{23} $的偏好敏感性的真实值$θ_{23} = 41^\ circ（49^\ circ）$（49^\ circ）$超过$ 4S（3σ）$ for $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ nuce。
Results from the experiments like LSND, and MiniBooNE hint towards the possible presence of an extra eV scale sterile neutrino. The addition of such a neutrino will significantly impact the standard three flavour neutrino oscillations; in particular, it can give rise to additional degeneracies due to new sterile parameters. In our work, we investigate how the sensitivity to determine the octant of the neutrino mixing angle $θ_{23}$ is affected by introducing a sterile neutrino to the standard neutrino oscillation framework. We compute the oscillation probabilities in presence of a sterile neutrino, analytically, using the approximation that $Δ_{21}$, the smallest mass squared difference, is zero. We use these probabilities to understand the degeneracies analytically at different baselines. We present our results of the sensitivity to octant of $θ_{23}$ for beam neutrinos using a liquid argon time projection chamber (LArTPC). We also obtain octant sensitivity using atmospheric neutrinos using the same LArTPC detector without any charge identification capability. In addition, we include the charge tagging capability of muon capture in argon which allows one to differentiate between muon neutrino and antineutrino events. The combined sensitivity of beam and atmospheric neutrinos in a similar experimental setup is also delineated. We observe that by combining simulated data from the beam and atmospheric neutrinos (including charge-id for muons), the sensitivity to the octant of $θ_{23}$ for true values of $θ_{23}=41^\circ(49^\circ)$ exceeds $4σ(3σ)$ for more than $50\%$ values of true $δ_{13}$.
