Measurement of b hadron lifetimes in pp collisions at

Measurements are presented of the lifetimes of the , , , and hadrons using the decay channels , , , , , and . The data sample, corresponding to an integrated luminosity of 19.7, was collected by the CMS detector at the LHC in proton–proton collisions at . The lifetime is measured to be in and in , which results in a combined measurement of . The effective lifetime of the meson is measured in two decay modes, with contributions from different amounts of the heavy and light eigenstates. This results in two different measured lifetimes: and . The lifetime is found to be . The precision from each of these channels is as good as or better than previous measurements. The lifetime, measured with respect to the to reduce the systematic uncertainty, is . All results are in agreement with current world-average values.