| 瞬子效应在0++胶球的QCD求和规则中的作用 |
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| 引用本文： | 张珠峰,金洪英. 瞬子效应在0++胶球的QCD求和规则中的作用[J]. 中国物理 C, 2004, 28(3): 245-249 |
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| 作者姓名： | 张珠峰 金洪英 |
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| 作者单位： | 浙江大学浙江近代物理中心,杭州310027 |
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| 基金项目： | 国家自然科学基金和浙江省自然科学基金资助 |
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| 摘 要： | 利用包含瞬子效应的QCD求和规则计算了0++胶球的质量上限,结果为1.3GeV.还探讨了变动瞬子参量时对QCD求和规则的影响,发现包含瞬子修正的QCD求和规则在瞬子大小为1/3fm时变得很稳定
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| 关 键 词： | 瞬子 胶球 QCD求和规则 |
| 收稿时间： | 2003-06-27 |
Effect of Instanton on the QCD Sum Rule of 0+ + Glueball |
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| ZHANG Zhu-Feng ) JIN Hong-Ying ). Effect of Instanton on the QCD Sum Rule of 0+ + Glueball[J]. High Energy Physics and Nuclear Physics, 2004, 28(3): 245-249 |
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| Authors: | ZHANG Zhu-Feng ) JIN Hong-Ying ) |
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| Affiliation: | ZHANG Zhu-Feng 1) JIN Hong-Ying 2) |
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| Abstract: | In this paper, we investigate the instanton effects to the mass of 0 ++ glueball by QCD sum rule approach. The instantons are assummed to be free from each other and be with definite density varying with their sizes. We find the upper bound of mass of the 0 ++ glueball is 1 3GeV and very possibly the mass can be as low as 1GeV. Besides, the instanton effects greatly improve the stability of the sum rule and overtake the contribution of quarks and gluons condensate. The centre size of instantons at 1/3fm can give the stablest sum rule. |
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| Keywords: | instanton glueball QCD sum rule |
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