J/ψ衰变中的反质子-质子通道
高能物理 - 唯象学
2008-11-26 v2
摘要
BES合作实验最近测得的J/ψ衰变为光子和质子-反质子对，显示出在质子-反质子阈值处出现显著增强，而在衰变为中性π0和质子-反质子对时则未观察到此类增强。这种增强是来自质子-反质子准束缚态，还是来自Baryonium？一种自然的解释来自基于G守恒变换的传统质子-反质子相互作用模型。所观察到的质子-反质子结构源于1S0态的强吸引，以及可能在11S0波中出现的近阈值准束缚态。
引用
@article{arxiv.hep-ph/0501112,
title = {Antiproton-Proton Channels in J/psi Decays},
author = {B. Loiseau and S. Wycech},
journal= {arXiv preprint arXiv:hep-ph/0501112},
year = {2008}
}
备注
6 pages, 5 figures. The antiproton-proton pair being in isospin one in the J/Psi decay into neutral pion-antiproton-proton, the antiproton-proton 1P1 and 3S1 waves have been replaced by the 31P1 and 33S1 ones and Figs. 1 and 2 have been replaced accordingly. Conclusions are unchanged. Most of the content of the paper is published in Phys. Rev. C72, 011001 (2005)