AI 中文总结
该研究分析DUNE与T2HK长基线实验的互补性，提出通过固定能量下ν_μ→ν_e振荡概率的基线依赖探测T破坏，二者联合可在约4σ显著性水平确立T破坏的L奇分量，还可辅助搜寻CP相位δ_CP。
AI 中文摘要
我们研究DUNE和T2HK长基线实验对中微子振荡中时间反演（T）破坏的灵敏度。不同于交换初始和末态中微子味的传统方法，我们仅利用中微子数据，通过固定中微子能量下ν_μ→ν_e振荡概率对L（基线长度）的依赖关系来搜寻T破坏。在标准三味框架内，我们表明DUNE和T2HK联合可在高达约4σ的显著性水平下确立振荡概率中L奇分量的存在，最优灵敏度对应的中微子能量范围为E_ν∈[0.68,0.92]GeV，其中DUNE的第二个振荡极大值在该分析中起关键作用。我们进一步表明，仅运行中微子模式时DUNE对T破坏更敏感，而在传统中微子与反中微子对比中T2HK灵敏度更优，这使得两个实验在搜寻CP相位δ_CP时互为补充。
英文摘要
We study the sensitivity of the DUNE and T2HK long-baseline experiments to time reversal (T) violation in neutrino oscillations. Rather than the conventional approach of exchanging initial and final neutrino flavors, we search for T violation through the $L$-dependence of the $ν_μ\to ν_e$ transition probability at fixed neutrino energy using neutrino data only. Within the standard three-flavour framework, we show that the DUNE and T2HK together can establish the presence of an $L$-odd component in the oscillation probability at up to $\sim 4σ$ significance, with the optimal sensitivity in the energy range $E_ν\in [0.68, 0.92]$ GeV. The second oscillation maximum of DUNE plays a crucial role in this analysis. We further show that DUNE is more sensitive to T violation that is running in neutrino-only mode, whereas T2HK provides better sensitivity in the conventional neutrino versus anti-neutrino comparison, making the two experiments complementary to each other in search of the CP phase $δ_{\rm CP}$.
CommentsContribution to Blois 2026: 37th Recontres de Blois on "Particle Physics and Cosmology" conference proceedings
