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Science 11 July 2003:
Vol. 301. no. 5630, p. 153
DOI: 10.1126/science.301.5630.153a
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News of the Week

HIGH-ENERGY PHYSICS:
Evidence for 'Pentaquark' Particle Sets Theorists Re-Joyce-ing

Charles Seife

Three quarks for Muster Mark? Every physicist's favorite Finnegans Wake passage might need a little updating. Several experiments around the world seem to have created an exotic particle containing five quarks rather than the two or three that make up all other quarky matter.

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