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Fig. 14 | The European Physical Journal C

Fig. 14

From: Heavy neutrino mixing in the T2HK, the T2HKK and an extension of the T2HK with a detector at Oki Islands

Fig. 14

The minimum of \(\chi ^2(\Pi )\) Eq. (32), \(\min \chi ^2\). The benchmark with Eq. (37) is assumed, and the true mass hierarchy is inverted. The upper-left, upper-right and lower-right subplots correspond to the T2HK, the T2HKK, and the plan of the T2HK plus a 10 kton water Cerenkov detector at Oki, respectively. For comparative study, we show in the lower-left a subplot for a plan of the T2HK plus a 10 kton water Cerenkov detector at Kamioka. \(\min \chi ^2=1,\,4,\,9\) on the red solid, blue dashed, and purple dot-dashed contours, respectively

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