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Nature 435, 287-288 (19 May 2005) | doi:10.1038/435287a; Published online 18 May 2005
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Particle physics: Vanishing pentaquarks
Frank Close1
Abstract
After a first inconclusive sighting, the search for exotic particles that consist of five quarks has been hotly pursued in the past few years. But the weight of evidence is now shifting against their existence.
Correct perceptions differ from mistaken ones in that they become clearer when experimental accuracy is improved — Irving Langmuir's observation may have gained a new example with the latest report on the question of the 'pentaquark' particle. A high-statistics experiment at the Jefferson Laboratory in Virginia finds no evidence to support claims of the existence of this enigmatic object that have been made over the past three years.
- Frank Close is in the Rudolf Peierls Centre for Theoretical Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK.
Email: f.close@physics.ox.ac.uk
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