Form factors of pions, kaons & protons at the highest timelike momentum transfers & first measurements of hyperons
Northwestern University, Evanston, IL 60208, USA
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Published online: 29 May 2015
Electromagnetic form factors of hadrons for timelike momentum transfers can be measured by particle-antiparticle annihilation into hadron-antihadron pairs. We have made the world’s first high precision measurements of timelike form factors of π and K mesons, and ground states of the baryons, protons, and the hyperons Λ0, Σ0, Σ+, Ξ0, Ξ–, Ω– at the high momentum transfers of 14.2 and 17.4 GeV2. Limitations of perturbative QCD are revealed, and evidence is presented for the effects of diquark correlations in Λ0 and Σ0.
© Owned by the authors, published by EDP Sciences, 2015
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