  B-hadrons are an ideal tool for advancing our current understanding of the
flavor sector of the Standard Model (SM). The study of B-meson production and
decays is one of the key physics themes at the Large Hadron Collider (LHC)
thanks to the large production rate and the fact that B-hadrons are relatively
easy to trigger on and identify due to their long lifetime and decays to muons.
This talk presents the cross section measurement for the exclusive final state
Bs->J/psi phi and an evaluation of the decay branching fraction from the
previously published exclusive-B production cross sections. Besides probing the
heavy quark properties for the first time at the LHC energy, these measurements
are also important tools for understanding and calibrating the detector, giving
input for Monte Carlo tuning, and providing results for direct comparison with
other experiments.
