论文标题
长基线中微子数据中的量子分解和放松
Quantum decoherence and relaxation in long-baseline neutrino data
论文作者
论文摘要
我们研究了使用MINOS和T2K数据研究量子变质和放松在中微子振荡中的影响。开放量子系统的形式主义用于描述中微子系统与环境的相互作用，在这种环境中，相互作用的强度受抗碳参数$γ$调节。我们假设通过$γ=γ_0（e/\ mbox {gev}）^n $参数化的能量依赖性，其中$ n = -2,0，+2 $，并考虑三种不同的情况，从而允许对放松效果进行研究，并将实层和大气扇区限制为相同的分离参数。关于我们的理论模型，MINOS和T2K数据呈现了一种互补的行为，从而分别对$ n = +2 $和$ n = -2 $具有更好的灵敏度。我们对两个实验数据进行了组合分析，其中还包括对$ \ sin^2θ_{13} $的反应器约束，并观察结果对我们研究的方案的独立性。作为分析的亮点，我们获得了$ n = -2 $的能量依赖性$γ_0$的最佳限制，报告的上限为$ 1.7 \ times 10^{ - 23} $ 〜GEV，在90 \％的置信度下。
We investigate the effect of quantum decoherence and relaxation in neutrino oscillations using MINOS and T2K data. The formalism of open quantum systems is used to describe the interaction of a neutrino system with the environment, where the strength of the interaction is regulated by a decoherence parameter $Γ$. We assume an energy dependence parameterized by $Γ= γ_0 (E/\mbox{GeV})^n$, with $n=-2,0,+2$, and consider three different scenarios, allowing the investigation of the effect of relaxation and of constraining the solar and atmospheric sectors to the same decoherence parameter. The MINOS and T2K data present a complementary behavior, with regard to our theoretical model, resulting in a better sensitivity for $n = +2$ and $n = -2$, respectively. We perform a combined analyses of both experimental data, which also include a reactor constraint on $\sin^2 θ_{13}$, and observe an independence of the results to the scenarios we investigate. As highlight of our analyses we obtain the best limit on $γ_0$ for the energy dependence of $n = -2$, reporting an upper bound of $1.7 \times 10^{-23}$~GeV, at the 90\% confidence level.
