Axial charges of N(1535) and N(1650) in two-flavor lattice QCD

Toru T. Takahashi; Teiji Kunihiro

doi:10.1088/1674-1137/33/12/029

Chinese Physics C> 2009, Vol. 33> Issue(12) : 1233-1237 DOI: 10.1088/1674-1137/33/12/029

Axial charges of N(1535) and N(1650) in two-flavor lattice QCD

Toru T. Takahashi ^, ,
Teiji Kunihiro

Abstract
HTML
Reference
Related

PDF

Abstract：
We show the lattice QCD results on the axial charge g_A^N*N* of negative parity nucleon resonances, N^*(1535) and N^*(1650), which are key clues to the chiral structure in baryon sector. The measurements are performed with up and down dynamical quarks employing the renormalization-group improved gauge action at β=1.95 and the O(a) improved clover quark action with the hopping parameters, κ=0.1375, 0.1390 and 0.1400. In order to properly separate signals of N^*(1535) and N^*(1650), we construct 2×2 correlation matrices and diagonalize them. Wraparound contributions in the correlator, which can be another source of signal contaminations, are eliminated by imposing the Dirichlet boundary condition in the temporal direction. We find that the axial charge of N^*(1535) takes small values as g_A^N*N*~O(0.1), whereas that of N^*(1650) is about 0.5, which is found independent of quark masses and consistent with the predictions by the naive nonrelativistic quark model.

[1]	Masaki J. S. Yang . Rephasing invariant formulae for CP phases in general parameterizations of flavor mixing matrix and exact sum rules with unitarity triangles. Chinese Physics C, 2026, 50(2): 1-5.
[2]	Ulaş Özdem . Unveiling the electromagnetic structure and intrinsic dynamics of spin-3/2 hidden-charm pentaquarks: A comprehensive QCD analysis. Chinese Physics C, 2025, 49(10): 103106. doi: 10.1088/1674-1137/ade95a
[3]	Tao Hong , Xiao-Song Yang , Zhi-Gang Wang . Two-body strong decays of the hidden-charm tetraquark molecular states via QCD sum rules. Chinese Physics C, 2025, 49(10): 103104. doi: 10.1088/1674-1137/add912
[4]	. SU(3) flavor symmetry analysis of hyperon non-leptonic two body decays. Chinese Physics C, 2025, 49(12): 123101. doi: 10.1088/1674-1137/adf1f1
[5]	Xiaocong Ai , Wolfgang Altmannshofer , Peter Athron , Xiaozhi Bai , Lorenzo Calibbi , Lu Cao , Yuzhi Che , Chunhui Chen , Ji-Yuan Chen , Long Chen , Mingshui Chen , Shanzhen Chen , Xuan Chen , Shan Cheng , Cheng-Wei Chiang , Andreas Crivellin , Hanhua Cui , Olivier Deschamps , Sébastien Descotes-Genon , Xiaokang Du , Shuangshi Fang , Yu Gao , Yuanning Gao , Li-Sheng Geng , Pablo Goldenzweig , Jiayin Gu , Feng-Kun Guo , Yuchen Guo , Zhi-Hui Guo , Tao Han , Hong-Jian He , Jibo He , Miao He , Xiaogang He , Yanping Huang , Gino Isidori , Quan Ji , Jianfeng Jiang , Xu-Hui Jiang , Jernej F. Kamenik , Tsz Hong Kwok , Gang Li , Geng Li , Haibo Li , Haitao Li , Hengne Li , Honglei Li , Liang Li , Lingfeng Li , Qiang Li , Qiang Li , Shu Li , Xiaomei Li , Xin-Qiang Li , Yiming Li , Yubo Li , Yuji Li , Zhao Li , Hao Liang , Zhijun Liang , Libo Liao , Zoltan Ligeti , Jia Liu , Jianbei Liu , Tao Liu , Yi Liu , Yong Liu , Zhen Liu , Xinchou Lou , Peng-Cheng Lu , Alberto Lusiani , Hong-Hao Ma , Kai Ma , Farvah Mahmoudi , Yajun Mao , Yaxian Mao , David Marzocca , Juan-Juan Niu , Soeren Prell , Huirong Qi , Sen Qian , Zhuoni Qian , Qin Qin , Ariel Rock , Jonathan L. Rosner , Manqi Ruan , Dingyu Shao , Chengping Shen , Xiaoyan Shen , Haoyu Shi , Liaoshan Shi , Zong-Guo Si , Cristian Sierra , Huayang Song , Shufang Su , Wei Su , Zhijia Sun , Michele Tammaro , Dayong Wang , En Wang , Fei Wang , Hengyu Wang , Jian Wang , Jianchun Wang , Kun Wang , Lian-Tao Wang , Wei Wang , Xiaolong Wang , Xiaoping Wang , Yadi Wang , Yifang Wang , Yuexin Wang , Xing-Gang Wu , Yongcheng Wu , Rui-Qing Xiao , Ke-Pan Xie , Yuehong Xie , Zijun Xu , Haijun Yang , Hongtao Yang , Lin Yang , Shuo Yang , Zhongbao Yin , Fusheng Yu , Changzheng Yuan , Xing-Bo Yuan , Xuhao Yuan , Chongxing Yue , Xi-Jie Zhan , Hong-Hao Zhang , Kaili Zhang , Liming Zhang , Xiaoming Zhang , Yang Zhang , Yanxi Zhang , Ying Zhang , Yongchao Zhang , Yu Zhang , Zhen-Hua Zhang , Zhong Zhang , Mingrui Zhao , Qiang Zhao , Xu-Chang Zheng , Yangheng Zheng , Chen Zhou , Daicui Zhou , Pengxuan Zhu , Yongfeng Zhu , Xuai Zhuang , Xunwu Zuo , Jure Zupan . Flavor physics at the CEPC: a general perspective. Chinese Physics C, 2025, 49(10): 103003. doi: 10.1088/1674-1137/adf1f0
[6]	Zhuoyi Pang , Jian-Hui Zhang , Dian-Jun Zhao . Moments from momentum derivatives in lattice QCD. Chinese Physics C, 2025, 49(10): 101001. doi: 10.1088/1674-1137/aded04
[7]	BAO Ai-Dong , YAO Hai-Bo , WU Shi-Shu . Topological approach to examine the singularity of the axial-vector current in an Abelian gauge field theory (QED). Chinese Physics C, 2009, 33(3): 177-180. doi: 10.1088/1674-1137/33/3/003
[8]	Xu Jianming . Matching Problem of Lattice with Transverse Coupling. Chinese Physics C, 1995, 19(1): 73-81.

Access

Get Citation

Toru T. Takahashi and Teiji Kunihiro. Axial charges of N(1535) and N(1650) in two-flavor lattice QCD[J]. Chinese Physics C, 2009, 33(12): 1233-1237. doi: 10.1088/1674-1137/33/12/029

Toru T. Takahashi and Teiji Kunihiro. Axial charges of N(1535) and N(1650) in two-flavor lattice QCD[J]. Chinese Physics C, 2009, 33(12): 1233-1237. doi: 10.1088/1674-1137/33/12/029 shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2009-08-07
Revised: 1900-01-01

Article Metric

Article Views(3836)
PDF Downloads(603)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Axial charges of N(1535) and N(1650) in two-flavor lattice QCD

Toru T. Takahashi ^,
Teiji Kunihiro

Corresponding author: Toru T. Takahashi,

Received Date: 2009-08-07
Accepted Date: 1900-01-01
Available Online: 2009-12-05

Abstract:

We show the lattice QCD results on the axial charge g_A^N*N* of negative parity nucleon resonances, N^*(1535) and N^*(1650), which are key clues to the chiral structure in baryon sector. The measurements are performed with up and down dynamical quarks employing the renormalization-group improved gauge action at β=1.95 and the O(a) improved clover quark action with the hopping parameters, κ=0.1375, 0.1390 and 0.1400. In order to properly separate signals of N^*(1535) and N^*(1650), we construct 2×2 correlation matrices and diagonalize them. Wraparound contributions in the correlator, which can be another source of signal contaminations, are eliminated by imposing the Dirichlet boundary condition in the temporal direction. We find that the axial charge of N^*(1535) takes small values as g_A^N*N*~O(0.1), whereas that of N^*(1650) is about 0.5, which is found independent of quark masses and consistent with the predictions by the naive nonrelativistic quark model.