{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.83664.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/1654926"}},{"@id":"https://doi.org/10.1103/PhysRevD.97.072010","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"CMS Collaboration"},"creator":{"@type":"Organization","name":"CMS Collaboration"},"datePublished":"2018","description":"An analysis of the bottom baryon decay $\\Lambda_{b}\\to J/\\psi \\Lambda$ is performed to measure the $\\Lambda_b$ polarization and three angular parameters in data from pp collisions at $\\sqrt{s} = 7$ and $8\\, {\\rm TeV}$, collected by the CMS experiment at the Large Hadron Collider. The $\\Lambda_b$ polarization is measured to be $0.00\\pm0.06$ (stat) $\\pm0.06$ (syst) and the parity-violating asymmetry parameter is determined to be $-0.14\\pm0.14$ (stat) $\\pm0.10$ (syst).   The measurements are compared to various theoretical predictions, including those from perturbative quantum chromodynamics.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.83664.v1/t1","@type":"Dataset","description":"The measured values of the angular parameters and the $\\Lambda_b$ polarization.","name":"Table 1"},{"@id":"https://doi.org/10.17182/hepdata.83664.v1/t2","@type":"Dataset","description":"The values of the helicity amplitudes in the decay.","name":"Table 2"},{"@id":"https://doi.org/10.17182/hepdata.83664.v1/t3","@type":"Dataset","description":"Correlation matrix for the fitted parameters.","name":"Table 3"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins1654926?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/83664"}],"inLanguage":"en","name":"Measurement of the $\\Lambda_b$ polarization and angular parameters in $\\Lambda_b\\to J/\\psi\\, \\Lambda$ decays from pp collisions at $\\sqrt{s}=$ 7 and 8 TeV","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins1654926?version=1","version":1}