J. van den Brand

Measurement of the B+c meson lifetime using B+c → J/ψ μ+ νμ X decays - eScholarship

© 2014, CERN for the benefit of the LHCb collaboration. The lifetime of the B+c meson is measured using semileptonic decays having a J/ψ meson and a muon in the final state. The data, corresponding to an integrated luminosity of 2 fb−1, are collected by the LHCb detector in pp collisions at a centre-of-mass energy of 8 TeV. The measured lifetime is τ = 509 ± 8 ± 12 fs, where the first uncertainty is statistical and the second is systematic.The lifetime of the \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}

Measurement of psi (2S) polarisation in pp collisions at root s=7 TeV - eScholarship

{B} _{c} ^+