Sirunyan, A. M.Tumasyan, A.Adam, W.Ambrogi, F.Asilar, E.Bergauer, T.The CMS Collaboration2025-03-072025-03-0720182470-00102470-0029https://doi.org/10.1103/PhysRevD.97.072010https://hdl.handle.net/20.500.12507/3229An analysis of the bottom baryon decay Lambda(b) -> J/psi(-> mu(+)mu(-))Lambda( -> p pi(-)) is performed to measure the Lambda(b) polarization and three angular parameters in data from pp collisions at root s = 7 and 8 TeV, collected by the CMS experiment at the Large Hadron Collider. The Lambda(b) polarization is measured to be 0.00 +/- 0.06(stat) +/- 0.06(syst) and the parity-violating asymmetry parameter is determined to be 0.14 +/- 0.14(stat) +/- 0.10(syst). The measurements are compared to various theoretical predictions, including those from perturbative quantum chromodynamics.eninfo:eu-repo/semantics/openAccessArticle977WOS:0004301635000012-s2.0-8504680631110.1103/PhysRevD.97.072010Q1Q1