{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.141278.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/2637684"}},{"@id":"https://doi.org/10.1103/PhysRevD.108.032009","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ALICE Collaboration"},"creator":{"@type":"Organization","name":"ALICE Collaboration"},"datePublished":"2023","description":"A new, more precise measurement of the $\\Lambda$ hyperon lifetime is performed using a large data sample of Pb$-$Pb collisions at $\\sqrt{s_{\\rm NN}} = 5.02$ TeV with ALICE. The $\\Lambda$ and $\\overline{\\Lambda}$ hyperons are reconstructed at midrapidity using their two-body weak decay channel $\\Lambda \\rightarrow \\mathrm{p} + \\pi^{-}$ and $\\overline{\\Lambda} \\rightarrow \\overline{\\mathrm{p}} + \\pi^{+}$. The measured value of the $\\Lambda$ lifetime is $\\tau_{\\Lambda} = [261.07 \\pm 0.37 \\ ( \\rm stat.) \\pm 0.72 \\ (\\rm syst.) ]\\ \\rm ps$. The relative difference between the lifetime of $\\Lambda$ and $\\overline{\\Lambda}$, which represents an important test of CPT invariance in the strangeness sector, is also measured. The obtained value $(\\tau_{\\Lambda}-\\tau_{\\overline{\\Lambda}})/\\tau_{\\Lambda} = 0.0013 \\pm 0.0028 \\ (\\mathrm{stat.}) \\pm 0.0021 \\ (\\mathrm{syst.})$ is consistent with zero within the uncertainties. Both measurements of the $\\Lambda$ hyperon lifetime and of the relative difference between $\\tau_{\\Lambda}$ and $\\tau_{\\overline{\\Lambda}}$ are in agreement with the corresponding world averages of the Particle Data Group and about a factor of three more precise.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.141278.v1/t1","@type":"Dataset","description":"Lproper spectrum of Lambda and exponential fit for the lifetime extraction. Only statistical uncertainties are shown for each data point...","name":"Table 1"},{"@id":"https://doi.org/10.17182/hepdata.141278.v1/t2","@type":"Dataset","description":"Lproper spectrum of Antilambda and exponential fit for the lifetime extraction. Only statistical uncertainties are shown for each data point...","name":"Table 2"},{"@id":"https://doi.org/10.17182/hepdata.141278.v1/t3","@type":"Dataset","description":"Lproper spectrum of Lambda and Antilambda and exponential fit for the lifetime extraction. Only statistical uncertainties are shown for each...","name":"Table 3"},{"@id":"https://doi.org/10.17182/hepdata.141278.v1/t4","@type":"Dataset","description":"Lambda lifetime measured in different centrality intervals. Only statistical uncertainties are shown.","name":"Table 4"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins2637684?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/141278"}],"inLanguage":"en","name":"Measurement of the $\\Lambda$ hyperon lifetime","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins2637684?version=1","version":1}