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强子结构的协变手征有效理论分析

温莉宏 杨继锋

温莉宏, 杨继锋. 强子结构的协变手征有效理论分析[J]. 华东师范大学学报(自然科学版), 2018, (3): 121-128. doi: 10.3969/j.issn.1000-5641.2018.03.013
引用本文: 温莉宏, 杨继锋. 强子结构的协变手征有效理论分析[J]. 华东师范大学学报(自然科学版), 2018, (3): 121-128. doi: 10.3969/j.issn.1000-5641.2018.03.013
WEN Li-hong, YANG Ji-feng. An analysis of the hadron structure in covariant chiral effective theory[J]. Journal of East China Normal University (Natural Sciences), 2018, (3): 121-128. doi: 10.3969/j.issn.1000-5641.2018.03.013
Citation: WEN Li-hong, YANG Ji-feng. An analysis of the hadron structure in covariant chiral effective theory[J]. Journal of East China Normal University (Natural Sciences), 2018, (3): 121-128. doi: 10.3969/j.issn.1000-5641.2018.03.013

强子结构的协变手征有效理论分析

doi: 10.3969/j.issn.1000-5641.2018.03.013
基金项目: 

国家自然科学基金 11435005

详细信息
    作者简介:

    温莉宏, 女, 硕士研究生, 研究方向为粒子物理与场论.E-mail:lhwen336@126.com

    通讯作者:

    杨继锋, 男, 副教授, 硕士生导师, 研究方向为粒子物理与场论.E-mail:jfyang66@126.com

  • 中图分类号: O413.3

An analysis of the hadron structure in covariant chiral effective theory

  • 摘要: 采用协变手征有效场论,在一圈图水平上计算了与核子部分子分布函数相关的低能区Twist-2算符矩阵元,发现破坏手征幂次规则的项全部是依赖核子质量的定域项,可通过定域抵消项减除,余下的完全是满足手征幂次规则的贡献,与非相对论的重重子手征微扰论(Heavy Baryon Chiral Perturbation Theory,HBChPT)框架下的结果一致.又因重重子手征微扰论中重子传播子的过度简化可能导致错误的核子阈值行为,故本研究结果佐证了在协变手征微扰框架下采用恰当的减除手段计算,既可得到正确的核子阈值行为,又能得到满足手征幂次规则的结果,从而更适合作为研究强子物理的有效场理论框架.
  • 图  1  单核子态下的一圈图

    Fig.  1  One-loop diagrams for single-nucleon states

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出版历程
  • 收稿日期:  2017-05-02
  • 刊出日期:  2018-05-25

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