论文标题
Beta-Decay引起的抗肿瘤波袋的宽度
The Width of a Beta-decay-induced Antineutrino Wavepacket
论文作者
论文摘要
中微子的时间演变取决于其创造时的初始特性，包括风味，能量和波袋大小。尽管在核β衰减的背景下，在核β衰减的背景下，没有扎实的理论预测，尽管这一过程对于中微子实验的过去，现在和未来很重要。在本文中，我们通过使用开放量子系统的形式主义将父核腐烂到纠缠的抗神经支架系统的亲本核将衰减的父核处理到纠缠的抗神经抗体系统中，从而为β-蛋白诱导的电子抗神经波袋的大小提供了定量预测。至关重要的是父粒子的离域量表。 We construct a systematic description of the hierarchy of localizing entanglements that provides an unambiguous statement of the relevant localization scale, found to be closely related to the diameter of the parent nucleus (e.g. $\sim$5-6~fm for beta-decaying fission daughters) and as low as the typical nucleon-nucleon correlation distance ($\sim$1~fm).例如，在核反应堆内部，这转化为$σ_{ν，x} \ sim10 \ mathrm { - } 400 $ 〜pm的初始电子抗神经波袋宽度范围$ e _ {\ overline ventline v_e}> 1.8 $ 〜emev，依赖于decay silem silem and emite and in emities and emite and symit，后退系统。该包膜中的波袋大小不会在标准三中性模型中可预见的反应堆实验中对振荡概率产生可观察的影响，其中包括juno，预计对$σ_{ν，x} \ x} \ simsim3 $ 〜pm敏感。
The time evolution of a neutrino is dependent on its initial properties at creation including flavor, energy, and wavepacket size. There exists no solid theoretical prediction for the latter property in the context of nuclear beta decay, despite the importance of this process for the past, present, and future of neutrino experimentation. In this paper, we provide a quantitative prediction for the size of a beta-decay-induced electron antineutrino wavepacket by treating the parent nucleus decaying to an entangled antineutrino-recoil system using the formalism of open quantum systems. Of central importance is the delocalization scale of the parent particle. We construct a systematic description of the hierarchy of localizing entanglements that provides an unambiguous statement of the relevant localization scale, found to be closely related to the diameter of the parent nucleus (e.g. $\sim$5-6~fm for beta-decaying fission daughters) and as low as the typical nucleon-nucleon correlation distance ($\sim$1~fm). Inside a nuclear reactor, for example, this translates to initial electron antineutrino wavepacket widths in the $σ_{ν,x}\sim10\mathrm{-}400$~pm range for $E_{\overlineν_e}>1.8$~MeV, with dependencies on decaying nucleus size, the emitted antineutrino energy, and the kinematics of the recoiling system. Wavepacket sizes in this envelope do not produce an observable effect on oscillation probability in foreseeable reactor experiments in the standard three-neutrino model, including JUNO which is expected to be sensitive to $σ_{ν,x}\lesssim3$~pm.
