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Science 3 April 1998:
Vol. 280. no. 5360, p. 35
DOI: 10.1126/science.280.5360.35a
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Research News

PARTICLE PHYSICS:
Physicists Find the Last of the Mesons

David Kestenbaum

The discovery of the Bc meson, announced on 5 March at a seminar at the Fermi National Accelerator Laboratory in Batavia, Illinois, places the capstone on a pile of discoveries going back 50 years and inks the final entry in the basic "periodic table" for these particles. Physicists expect that knowledge of the new meson's mass and lifetime will also sharpen their understanding of the force that binds atomic nuclei.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)