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arXiv 0712.4376nucl-th
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组分夸克模型中$N\bar{N}$ $S$波弹性截面和可能束缚态的研究

Study on $N\bar{N}$ $S$-wave Elastic Cross Section and Possible Bound States Within a Constituent Quark Model

Hourong Pang, Jialun Ping, Fan Wang

摘要:

在手征组分夸克模型的框架下,考虑$π$湮灭和单胶子湮灭的贡献,通过适当调整单胶子湮灭耦合常数,可以再现质子-反质子$S$波弹性散射截面的实验数据.同时,利用固定的模型参数,对所有可能的$S$波核子-反核子态进行了动力学计算,结果表明,在$J/ψ$和$B$衰变中,不存在由$p\bar{p}$阈值处的强增强所指示的$S$波束缚态.

英文摘要:

In the framework of a chiral constituent quark model, considering the contributions of $π$ annihilation and one-gluon annihilation, the proton-antiproton $S$-wave elastic scattering cross section experimental data can be reproduced by adjusting properly one-gluon annihilation coupling constant. Meanwhile, using the fixed model parameter, we do a dynamical calculation for all possible $S$-wave nucleon-antinucleon states, the results show that, there is no $S$-wave bound state as indicated by a strong enhancement at threshold of $p\bar{p}$ in $J/ψ$ and $B$ decays.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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