Chiral extrapolation of nucleon axial charge gA in effective field theory

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Hong-na Li and P. Wang. Chiral extrapolation of nucleon axial charge gA in effective field theory[J]. Chinese Physics C, 2016, 40(12): 123106. doi: 10.1088/1674-1137/40/12/123106
Hong-na Li and P. Wang. Chiral extrapolation of nucleon axial charge gA in effective field theory[J]. Chinese Physics C, 2016, 40(12): 123106.  doi: 10.1088/1674-1137/40/12/123106 shu
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Received: 2016-08-17
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    Supported by National Natural Science Foundation of China (11475186) and Sino-German CRC 110 (NSFC 11621131001)

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Chiral extrapolation of nucleon axial charge gA in effective field theory

    Corresponding author: Hong-na Li, lihongna@ihep.ac.cn
    Corresponding author: P. Wang, lihongna@ihep.ac.cn
  • 1. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • 2. College of Physics, Jilin University, Changchun, Jilin 130012, China
  • 3. Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049, China
Fund Project:  Supported by National Natural Science Foundation of China (11475186) and Sino-German CRC 110 (NSFC 11621131001)

Abstract: The extrapolation of nucleon axial charge gA is investigated within the framework of heavy baryon chiral effective field theory. The intermediate octet and decuplet baryons are included in the one loop calculation. Finite range regularization is applied to improve the convergence in the quark-mass expansion. The lattice data from three different groups are used for the extrapolation. At physical pion mass, the extrapolated gA are all smaller than the experimental value.

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