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QCD and e+e-→baryon plus antibaryon
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DOI：10.1016/S0370-2693(02)02033-6.png)
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摘要
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We discuss the QCD constraints on e(+)e(-) --> baryon-antibaryon close to threshold, in light of the puzzling experimental data which indicate that close to threshold sigma(e(+)e(-) --> n (n) over bar) > sigma(e(+)e(-) --> p (p) over bar). We focus on theprocess e(+)e(-) --> Delta(Delta) over bar, 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 the Delta multiplet, modulo one crucial dynamical assumption. (C) 2002 Published by Elsevier Science B. V.
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4.5
论文数:
3.2W
被引数:
7.3W
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