A Possible Resolution of the e+e− → N̄N Puzzle

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 ∗

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 ∗

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 chann...

On Electron-Positron Annihilation into Nucleon-Antinucleon Pairs

We discuss the puzzling experimental results on baryon-antibaryon production in e+e− annihilation close to the threshold, in particular the fact that σ(e+e− → n̄n) >∼ σ(e+e− → p̄p). We discuss an interpretation in terms of a two-step process, via an intermediate coherent isovector state serving as an intermediary between e+e− and the baryon-antibaryon system. We provide evidence that the isovecto...

Introducing an Invention: Puzzle Shaped Cast for Upper Limb Fractures

Upper limb fractures are prevalent injuries. An essential element of fracture healing is to maintain the bones alignment. However there are lots of complications associated with traditional ways of treatment, such as compartment syndrome and stiffness due to immobility for long time. Also evaluation and observation of the limb under the casts for potential infections and skin issues are n...

ar X iv : h ep - p h / 02 02 23 4 v 1 2 5 Fe b 20 02 hep - ph / 0202234 TAUP – 2679 - 01 QCD and e + e − →

We discuss the QCD constraints on e+e− → baryon–anti-baryon close to threshold, in light of the puzzling experimental data which indicate that close to threshold σ(e+e− → nn̄) > σ(e+e− → pp̄). We focus on the process e+e− → ∆∆̄, which is particularly simple from the theoretical point of view. In this case it is possible to make exact QCD predictions for the relative yields of the four members of t...