Results on $b$ hadron properties in CMS

The lifetime is among the fundamental properties of particles and is one of the important observables in heavy hadrons allowing to test the theoretical tools describing their physics. This report presents lifetime measurements of $B^0,B_{s}^{0},\Lambda _{b}^{0}$ and $B_{c}^{+}$ hadrons performed on data, corresponding to 19.7 fb$-^{1}$, collected by the CMS experiment at the LHC at a center-of-mass energy of √s = 8 TeV. The B$^0$ lifetime is measured to be 453.0± 1.6 (stat) ± 1.5 (syst) μm in $J/\psi K_{s}^{0}$ and 457.8 ± 2.7 (stat) ± 2.7 (syst) μm in $J/\psi K^*(892)^0$. The B$_{s}^{0}$ meson lifetime is measured in two decay modes with differing contributions from the heavy and light eigenstates, resulting in two different measured lifetimes: 504.3 ± 10.5 (stat) ±3.7 (syst) μm in $J/\psi \pi^+\pi^-$ and 443.9±2.0 (stat) ±1.2 (syst) μm in $J/\psi\phi$(1020) respectively. The lifetime of the $\Lambda_{b}^{0}$ hadron is found to be 443.1±8.2 (stat) ±2.7 (syst) μm. The B$_{c}^{+}$ lifetime is measured with respect to the B$^+$ lifetime and is found to be 162.3 ± 8.2 (stat) ± 4.7 (syst) ± 0.1 ($\tau_{B^+}$) μm.