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Chinese Physics C> 2015, Vol. 39> Issue(11) : 113103 DOI: 10.1088/1674-1137/39/11/113103

Meson electro-magnetic form factors in an extended Nambu-Jona-Lasinio model including heavy quark flavors

  • 1.

     School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China

  • Based on an extended NJL model including heavy quark flavors, we calculate the form factors of pseudo-scalar and vector mesons. After taking into account the vector-meson-dominance effect, which introduces a form factor correction to the quark vector coupling vertices, the form factors and electric radii of π+ and K+ pseudo-scalar mesons in the light flavor sector fit the experimental data well. The magnetic moments of the light vector mesons ρ+ and K*+ are comparable with other theoretical calculations. The form factors in the light-heavy flavor sector are presented to compare with future experiments or other theoretical calculations.
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LUAN Yi-Long, CHEN Xiao-Lin and DENG Wei-Zhen. Meson electro-magnetic form factors in an extended Nambu-Jona-Lasinio model including heavy quark flavors[J]. Chinese Physics C, 2015, 39(11): 113103. doi: 10.1088/1674-1137/39/11/113103
LUAN Yi-Long, CHEN Xiao-Lin and DENG Wei-Zhen. Meson electro-magnetic form factors in an extended Nambu-Jona-Lasinio model including heavy quark flavors[J]. Chinese Physics C, 2015, 39(11): 113103.  doi: 10.1088/1674-1137/39/11/113103 shu
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Received: 2015-04-17
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Meson electro-magnetic form factors in an extended Nambu-Jona-Lasinio model including heavy quark flavors

    Corresponding author: DENG Wei-Zhen,
  • 1. School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
  • Received Date: 2015-04-17
  • Available Online: 2015-11-20

Abstract: Based on an extended NJL model including heavy quark flavors, we calculate the form factors of pseudo-scalar and vector mesons. After taking into account the vector-meson-dominance effect, which introduces a form factor correction to the quark vector coupling vertices, the form factors and electric radii of π+ and K+ pseudo-scalar mesons in the light flavor sector fit the experimental data well. The magnetic moments of the light vector mesons ρ+ and K*+ are comparable with other theoretical calculations. The form factors in the light-heavy flavor sector are presented to compare with future experiments or other theoretical calculations.

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