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LHCb discovers a new, rare decay

LHCb continues its investigations into the mysteries of B mesons. Here, a particular kind of B meson, called the Bs, decays into a J/Psi particle and a pi+pi- pair. The reconstructed pion pair mass distribution shows that they mostly came from an f0 particle that has a mass of 980 MeV and some from another possible state near 1420 MeV. The dashed curve shows backgrounds, while the dotted curve indicates the sum of the interfering signal shapes.

Credit: Copyright CERN on behalf of the LHCb Collaboration.

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Taken on May 20, 2011