Comparison of Λ and Σ0 Production near Threshold in Proton-Proton Collisions

S. Sewerin et al.
Phys. Rev. Lett. 83, 682 – Published 26 July 1999
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Threshold measurements of the associated strangeness production reactions pppK+Λ and pppK+Σ0 are presented. The most remarkable feature of the data is that at the same excess energy the total cross section for the Σ0 production appears to be about a factor of 289+6 smaller than for the Λ particle. It is concluded that strong Σ0p final state interactions, and in particular the ΣNΛp conversion reaction, are the likely cause of the depletion in the Σ signal. This hypothesis is in line with other experimental evidence in the literature.

  • Received 4 November 1998


©1999 American Physical Society

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Vol. 83, Iss. 4 — 26 July 1999

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Heating up of Superconductors
January 27, 2017

This collection marks the 30th anniversary of the discovery of high-temperature superconductors. The papers selected highlight some of the advances that have been made to date, both in understanding why these compounds behave in the way they do, and in utilizing them in applications. The papers included in the collection have been made free to read.

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