Measurement of Lambda b polarization and the angular parameters of the decay Lambda b to J/psi Lambda

We present a measurement of the $\Lambda_{b}$ polarization based on an angular analysis of the decay $\Lambda_{b}\to J/\psi(\mu^{+}\mu^{-}) \Lambda^{0}(p\pi^{-})$, using data from pp collisions at $\sqrt{s}$ = 7 TeV and 8 TeV collected with the CMS detector. A transverse $\Lambda_{b}$ polarization of $0.00$ $\pm0.06(stat)$ $\pm 0.02(syst)$ is measured. % This is an example of a \textit{CMS Note} written in \LaTeX % using the \emph{cms-tdr} document class and processed using the % same \texttt{tdr} perl script used in generating the CMS Physics TDRs. % Instructions for producing CMS Notes and Internal Notes are given.