ar X iv : h ep - p h / 01 12 04 7 v 1 4 D ec 2 00 1 1 Towards the resolution of the e + e − → N̄N puzzle ∗
نویسنده
چکیده
We discuss the puzzling experimental results on baryon-antibaryon production in ee annihilation close to the threshold, in particular the fact that σ(ee → n̄n) > ∼ σ(ee → p̄p). We discuss an interpretation in terms of a two-step process, via an intermediate coherent isovector state serving as an intermediary between ee and the baryon-antibaryon system. We provide evidence that the isovector channel dominates both ee → pions and from N̄N annihilation at rest, and show that the observed ratio of σ(ee → n̄n)/σ(ee → p̄p) can be understood quantitatively in this picture.
منابع مشابه
ar X iv : h ep - p h / 01 08 10 6 v 1 1 2 A ug 2 00 1 W 10 A POSSIBLE RESOLUTION OF THE e + e − → N̄N PUZZLE ∗
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