Acta Scientiarum Naturalium Universitatis Pekinensis ›› 2019, Vol. 55 ›› Issue (3): 411-421.DOI: 10.13209/j.0479-8023.2019.027

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Loop Corrections to the Decuplet-Octet Baryon Transition Axial Charges

LENG Changzhi, CHEN Xiaolin†   

  1. School of Physics, Peking University, Beijing 100871
  • Received:2018-04-11 Revised:2018-05-07 Online:2019-05-20 Published:2019-05-20
  • Contact: CHEN Xiaolin,E-mail:chenxl(at)pku.edu.cn

重子十重态与八重态跃迁轴矢荷的圈图修正

冷长志, 陈晓林†   

  1. 北京大学物理学院, 北京 100871
  • 通讯作者: 陈晓林,E-mail:chenxl(at)pku.edu.cn

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Abstract:

The authors calulate chiral corrections to the decuplet-octet baryon transition axial charges through O(p3) using heavy baryon chiral perturbation theory (HBCPT). Theoretical predictions are presented. Chiral symmetry breaking, vertex correctiongs, wavefunction renormalization are included. The contributions from both the intermediate decuplet and octet baryon states are taken into account in the loops. The results show reasonably good convergence of the chiral expansion and agreement with the known experimental data.

Key words: axial charge; HBCPT, decuplet baryon, octet baryon

摘要：

采用重重子手征微扰论(HBCPT)理论, 考虑手征质量破缺效应、顶角修正、波函数重整化以及O(p3)圈图部分, 计算重子十重态与八重态跃迁轴矢荷手征修正, 并给出理论预言。对于涉及的圈图效应, 均考虑中间态是十重态和八重态的情况。计算过程展现出合理良好的手征收敛性, 与已有实验值符合较好。

关键词:
轴矢荷, 重重子手征微扰论, 十重态, 八重态

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