Commissioning of liquid Xe detector with VUV-MPPC readout for MEG II experiment

MEG II experiment is an upgrade of MEG experiment to search for charged lepton flavor violating decay of muon, \mu \rightarrow e\gamma Target sensitivity of MEG II is 6 \times 10^{-14}at 90% C.L., which is one order of magnitude better than MEG. Liquid xenon detector was used to detect 53 \,\mathrm{MeV}signal \gammaray in MEG, and this detector has been upgraded for MEG II. Replacement of 216 PMTs on the entrance face with 4092 newly...