Particle caught flip-flopping

D meson’s switch between matter and antimatter could help uncover new particles

By Andrew Grant, 17:56 PM March 8, 2013

A particle with an identity crisis could provide the next big discovery at the world's largest particle accelerator. The D meson has been caught in the act of flipping between matter and antimatter, researchers report online March 5 in Physical Review Letters.

D mesons, like other mesons, are short-lived particles that emerge from the shrapnel of proton collisions at CERN’s Large Hadron Collider outside Geneva. All of these particles decay within tiny fractions of a second. But four mesons,...

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