格点量子色动力学在中国
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摘要: 经过多年努力,人们已经成功地将自然界四种基本相互作用(强、弱、电磁、引力)中的前三种统一在量子场论的框架之中,即粒子物理的标准模型(Standard Model,SM)。该模型中关于强相互作用部分的基本理论是量子色动力学(Quantum Chromodynamics,QCD),它在高能区和低能区呈现出迥然不同的特性:在高能区QCD呈现出渐近自由(asymptotic freedom)和部分可微扰的特性;在低能区则展现出手征对称性破缺和色禁闭等非微扰特性。由于QCD在低能区(通常指几个GeV以下)具有非常强的非微扰特性,因此研究这个能区的物理必须利用非微扰的量子场论方法。目前已知最系统的非微扰理论方法就是格点QCD,如图1所示。
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期刊类型引用(2)
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