The N(N)over-bar interaction in a constituent quark model:: Baryonium states and protonium level shifts

被引：40
作者：
Entem, DR [1 ]
Fernández, F [1 ]
机构：
[1] Univ Salamanca, Grp Fis Nucl, IUFFyM, E-37008 Salamanca, Spain
来源：
PHYSICAL REVIEW C | 2006年 / 73卷 / 04期
关键词：
D O I：
10.1103/PhysRevC.73.045214
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We derive a N (N) over bar interaction from a constituent quark model constrained by the NN sector to investigate the possible baryonium resonant state X(1835) recently suggested as a possible interpretation of the near-threshold enhancement found in J/psi ->gamma p (p) over bar by the BES Collaboration. The interaction does not show bound or quasibound states but a P-3(0) resonance in the I=0 isospin channel. We analyze the shift of the antiprotonium hydrogen energy levels, finding that p (p) over bar -n (n) over bar mixing can explain the abnormally big value of the 2(3)P(0) energy shift.
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页数：7
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