Kanetada Nagamine,∗1,∗2 Francis L. Pratt,∗1,∗3,∗4 Isao Watanabe,∗1 and Eiko Torikai∗5 ∗1 Muon Science Laboratory, RIKEN ∗2 Meson Science Laboratory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK-MSL) ∗3 ISIS Muon Group, Rutherford Appleton Laboratory, UK ∗4 Department of Physics, The Clarendon Laboratory, University of Oxford, UK ∗5 Department of E...