Chinese Physics C > 2017, Vol. 41 > Issue(7): 074104 DOI: 10.1088/1674-1137/41/7/074104

Study ofX(5568) in a unitary coupled-channel approximationof BK and B_sπ

1.
College of Applied Sciences, Beijing University of Technology, Beijing 100124, China
2.
Department of Physics, Peking University, Beijing 100871, China
3.
College of Applied Sciences, Beijing University of Technology, Beijing 100124, China
4.
Department of Physics, Peking University, Beijing 100871, China

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Abstract：
The potential of the m B meson and the pseudoscalar meson is constructed up to the next-to-leading order Lagrangian, and then the m B Kand m B _sπ interaction is studied in the unitary coupled-channel approximation. A resonant state with a mass about 5568 MeV and J ^P=0 ⁺is generated dynamically, which can be associated with the X(5568) state announced by the D0 Collaboration recently. The mass and the decay width of this resonant state depend on the regularization scale in the dimensional regularization scheme, or the maximum momentum in the momentum cutoff regularization scheme. The scattering amplitude of the vector Bmeson and the pseudoscalar meson is calculated, and an axial-vector state with a mass near 5620 MeV and J ^P=1 ⁺is produced. Their partners in the charm sector are also discussed.
- chiral Lagrangian,
- meson-meson interactions,
- exotic mesons

References

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Bao-Xi Sun, Fang-Yong Dong and Jing-Long Pang. Study of X(5568) in a unitary coupled-channel approximationof BK and B _sπ[J]. Chinese Physics C, 2017, 41(7): 074104. doi: 10.1088/1674-1137/41/7/074104

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Received: 2017-01-04
Revised: 2017-03-05

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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

Study ofX(5568) in a unitary coupled-channel approximationof BK and B_sπ

Corresponding author:Bao-Xi Sun,

1. College of Applied Sciences, Beijing University of Technology, Beijing 100124, China

2. Department of Physics, Peking University, Beijing 100871, China

3. College of Applied Sciences, Beijing University of Technology, Beijing 100124, China

4. Department of Physics, Peking University, Beijing 100871, China

Received Date:2017-01-04

Accepted Date:2017-03-05

Available Online:2017-07-05

Abstract:The potential of the m B meson and the pseudoscalar meson is constructed up to the next-to-leading order Lagrangian, and then the m BKand m B_sπ interaction is studied in the unitary coupled-channel approximation. A resonant state with a mass about 5568 MeV andJ^P=0⁺is generated dynamically, which can be associated with theX(5568) state announced by the D0 Collaboration recently. The mass and the decay width of this resonant state depend on the regularization scale in the dimensional regularization scheme, or the maximum momentum in the momentum cutoff regularization scheme. The scattering amplitude of the vectorBmeson and the pseudoscalar meson is calculated, and an axial-vector state with a mass near 5620 MeV andJ^P=1⁺is produced. Their partners in the charm sector are also discussed.

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Study ofX(5568) in a unitary coupled-channel approximationof BK and B_sπ

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