Figure 5.

JUNO mass ordering sensitivity boosting. A significant increase of JUNO intrinsic sensitivity ($\mathrm{\Delta }{\chi }_{\text{JUNO}}^2\approx 9$) is possible exploiting the LB$\nu$B’s disappearance (DC) characterised by $\mathrm{\Delta }{\chi }_{\text{BOOST}}^2$ depending strongly on the uncertainty of $\mathrm{\Delta }{m}_{32}^2$. Today’s NuFit5.0 average LB$\nu$B-II’s precision on $\mathrm{\Delta }{m}_{32}^2$ is $\sim 1.4\%$. A rather humble 1.0% precision is possible, consistent with doubling the statistics if systematics allowed. Since NOvA and T2K are expected to increase their exposures by about factors of $\sim 3$ before the shutdown, sub-percent precision may also be within reach. While the ultimate precision is unknown, we shall consider a $\ge 0.75\%$ precision to illustrate this possibility. So, JUNO alone (intrinsic + boosting) could yield a $\ge 4\sigma$ (i.e., $\mathrm{\Delta }{\chi }^2$ $\ge$16) MO sensitivity, at $\ge$84% probability, within the LB$\nu$B-II era. A 5$\sigma$ potential may not be impossible, depending on fluctuations. Similarly, JUNO may further increase in significance to resolve ($\ge 5\sigma$ or $\mathrm{\Delta }{\chi }^2$ $\ge 25$) a pure vacuum oscillations MO measurement in combination with the LB$\nu$B-III’s $\mathrm{\Delta }{m}_{32}^2$ information.