Double Displacement in LHCb

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    A 7 TeV collision at the point PV (Primary Vertex) results in a B meson which consists of a b quark and a anti-strange quark. The B meson decays at SV (Secondary Vertex) to a Ds meson made of a charm and the anti-strange quark along with a muon and an unseen neutrino. The Ds meson itself decays at the TV (Tertiary Vertex). This sort of interaction allows us to measure interesting properties of the Bs mesons, for example how often
    they decay into Ds and a muon versus some other way.
    Copyright CERN for the benefit of the LHCb Collaboration

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