Discovery of a Narrow Resonance in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow><mrow><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow></math></span> Annihilation

doi:10.1103/PhysRevLett.33.1406

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Discovery of a Narrow Resonance in $e^{+} e^{-}$ Annihilation

J. -E. Augustin et al.

Phys. Rev. Lett. 33, 1406 – Published 2 December 1974

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Abstract

We have observed a very sharp peak in the cross section for $e^{+} e^{-} \to hadrons, e^{+} e^{-}$ , and possibly $μ^{+} μ^{-}$ at a center-of-mass energy of 3.105±0.003 GeV. The upper limit to the full width at half-maximum is 1.3 MeV.

Received 13 November 1974

DOI:https://doi.org/10.1103/PhysRevLett.33.1406

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Letters from the Past - A PRL Retrospective

2008 marked PRL’s 50th anniversary. As part of the celebrations a collection of milestone Letters was started. The collection contains Letters that have made long-lived contributions to physics, either by announcing significant discoveries, or by initiating new areas of research.