{"abstracts":[{"sha1":"2cd5569346055f90bd84a9f8d4330df30f673a42","content":"Precise measurement of two-neutrino double beta decay (DBD) half-life is an important step for the searches of Majorana neutrinos with neutrinoless double beta decay. We report the measurement of DBD half-life of 136Xe using the PandaX-4T dual-phase Time Projection Chamber (TPC) with 3.7-tonne natural xenon and the first 94.9-day physics data release. The background model in the fiducial volume is well constrained in situ by events in the outer active region. With a 136Xe exposure of 15.5 kg-year, we establish the half-life as 2.27±0.03stat.±0.10syst.×1021 years. This is the first DBD half-life measurement with natural xenon and demonstrates the physics capability of a large-scale liquid xenon TPC in the field of rare event searches.","mimetype":"application/xml+jats"}],"refs":[{"index":0,"extra":{"doi":"10.1103/physrev.48.512"},"key":"1"},{"index":1,"extra":{"doi":"10.1103/physrev.56.1184"},"key":"2"},{"index":2,"extra":{"doi":"10.1103/revmodphys.80.481"},"key":"3"},{"index":3,"extra":{"doi":"10.1155/2014/951432.arxiv"},"key":"4"},{"index":4,"extra":{"doi":"10.1103/physrevd.96.053001"},"key":"5"},{"index":5,"extra":{"doi":"10.1146/annurev-nucl-101918-023407"},"key":"6"},{"index":6,"extra":{"doi":"10.1103/physrevlett.123.161802"},"key":"7"},{"index":7,"extra":{"doi":"10.1103/physrevlett.117.082503"},"key":"8"},{"index":8,"extra":{"doi":"10.1007/jhep05(2016)159"},"key":"9"},{"index":9,"extra":{"doi":"10.1007/s11433-017-9028-0"},"key":"10"},{"index":10,"extra":{"doi":"10.1088/1674-1137/43/11/113001"},"key":"11"},{"index":11,"extra":{"doi":"10.1140/epjc/s10052-020-8284-0"},"key":"12"},{"index":12,"extra":{"doi":"10.1103/physrevc.89.015502"},"key":"14"},{"index":13,"extra":{"doi":"10.1103/physrevlett.122.192501"},"key":"15"},{"index":14,"extra":{"doi":"10.1088/1361-6633/aa5bc5"},"key":"17"},{"index":15,"extra":{"doi":"10.1103/physrevc.68.044302"},"key":"18"},{"index":16,"extra":{"doi":"10.1103/physrevc.77.045503"},"key":"19"},{"index":17,"extra":{"doi":"10.1103/physrevlett.125.171801"},"key":"20"},{"index":18,"extra":{"doi":"10.1103/physrevd.102"},"key":"21"},{"index":19,"extra":{"doi":"10.1103/physrevd.103.055019"},"key":"22"},{"index":20,"extra":{"doi":"10.1016/j.physletb"},"key":"23"},{"index":21,"extra":{"doi":"10.1103/physrevlett.127.261802"},"key":"24"},{"index":22,"extra":{"doi":"10.1007/s11433-018-9259-0"},"key":"25"},{"index":23,"extra":{"doi":"10.1088/1748-0221/17/02/t02004"},"key":"26"},{"index":24,"extra":{"doi":"10.1080/01621459.1979.10481038"},"key":"27"},{"index":25,"extra":{"doi":"10.1088/1748-0221/16/11/p11040"},"key":"28"},{"index":26,"extra":{"doi":"10.1103/physrevc.105.014604"},"key":"29"},{"index":27,"extra":{"doi":"10.1088/1748-0221/6/10/p10002"},"key":"30"},{"index":28,"extra":{"doi":"10.1088/1748-0221/16/09/t09004"},"key":"31"},{"index":29,"extra":{"doi":"10.1088/1674-1137/abf6c2"},"key":"32"},{"index":30,"extra":{"doi":"10.1007/jhep06(2022)147"},"key":"33"},{"index":31,"extra":{"doi":"10.1016/j.nds.2021.06.001"},"key":"34"},{"index":32,"extra":{"doi":"10.1134/1.855784"},"key":"35"},{"index":33,"extra":{"doi":"10.1088/1748-0221/15/12/p12038"},"key":"36"},{"index":34,"extra":{"doi":"10.1142/9781860948985_0039"},"key":"37"},{"index":35,"extra":{"doi":"10.1103/physrevc.102.065501"},"key":"38"}],"contribs":[{"index":0,"raw_name":"Lin 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