Mixing of the lowest-lying qqq configurations with JP=1/2- in different hyperfine interaction models

  • We investigate mixing of the lowest-lying qqq configurations with JP=1/2- caused by the hyperfine interactions between quarks mediated by Goldstone Boson Exchange, One Gluon Exchange, and both Goldstone Boson and One Gluon exchange, respectively. The first orbitally excited nucleon, Σ, Λ and Ξ states are considered. Contributions of both the contact term and tensor term are taken into account. Our numerical results show that mixing of the studied configurations in the two employed hyperfine interaction models are very different. Therefore, the present results, which should affect the strong and electromagnetic decays of baryon resonances, may be used to examine the present employed hyperfine interaction models.
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Jia Chen, Chunsheng An and Hong Chen. Mixing of the lowest-lying qqq configurations with JP=1/2- in different hyperfine interaction models[J]. Chinese Physics C, 2018, 42(3): 034104. doi: 10.1088/1674-1137/42/3/034104
Jia Chen, Chunsheng An and Hong Chen. Mixing of the lowest-lying qqq configurations with JP=1/2- in different hyperfine interaction models[J]. Chinese Physics C, 2018, 42(3): 034104.  doi: 10.1088/1674-1137/42/3/034104 shu
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Received: 2017-09-23
Revised: 2018-01-02
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    Supported by National Natural Science Foundation of China (11675131,11645002), Chongqing Natural Science Foundation (cstc2015jcyjA00032) and Fundamental Research Funds for the Central Universities (SWU115020)

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Mixing of the lowest-lying qqq configurations with JP=1/2- in different hyperfine interaction models

    Corresponding author: Chunsheng An,
  • 1. School of Physical Science and Technology, Southwest University, Chongqing 400715, China
Fund Project:  Supported by National Natural Science Foundation of China (11675131,11645002), Chongqing Natural Science Foundation (cstc2015jcyjA00032) and Fundamental Research Funds for the Central Universities (SWU115020)

Abstract: We investigate mixing of the lowest-lying qqq configurations with JP=1/2- caused by the hyperfine interactions between quarks mediated by Goldstone Boson Exchange, One Gluon Exchange, and both Goldstone Boson and One Gluon exchange, respectively. The first orbitally excited nucleon, Σ, Λ and Ξ states are considered. Contributions of both the contact term and tensor term are taken into account. Our numerical results show that mixing of the studied configurations in the two employed hyperfine interaction models are very different. Therefore, the present results, which should affect the strong and electromagnetic decays of baryon resonances, may be used to examine the present employed hyperfine interaction models.

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