Probing the mass degeneracy of particles with different spins

ZHANG Zhen-Hua; L&Uuml; Gang; WEI Ke-Wei

doi:10.1088/1674-1137/39/5/053101

Chinese Physics C> 2015, Vol. 39> Issue(5) : 053101 DOI: 10.1088/1674-1137/39/5/053101

Probing the mass degeneracy of particles with different spins

ZHANG Zhen-Hua ^1,2,, ,
LÜ Gang ³ ,
WEI Ke-Wei ^4,,

School of Nuclear Science and Technology, University of South China, Hengyang 421001, China;2 Cooperative Innovation Center for Nuclear Fuel Cycle Technology & Equipment, University of South China, Hengyang 421001, China;3 College of Science, Henan University of Technology, Zhengzhou 450001, China;4 College of Physics and Electrical Engineering, Anyang Normal University, Anyang 455002, China

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Abstract：
The spin is an important property of a particle. Although it is unlikely, there is still a possibility that two particles with di erent spins share similar masses. In this paper, we propose a method to probe this kind of mass degeneracy of particles with di erent spins. We use the cascade decay B⁺→X(3872)K⁺, X(3872)→D⁺D^- to illustrate our method. It can be seen that the possible mass degeneracy of X(3872) can lead to interesting behavior in the corresponding cascade decay.

References

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Choi S et al. (Belle collaboration). Phys. Rev. Lett., 2003, 91: 262001; arXiv: hep-ex/0309032[2] Abulencia A et al. (CDF collaboration). Phys. Rev. Lett., 2007, 98: 132002; arXiv: hep-ex/0612053[3] Choi S K, Olsen S, Trabelsi K, Adachi I, Aihara H et al. Phys. Rev. D, 2011, 84: 052004; arXiv: 1107.0163[hep-ex][4] Aaij R et al. (LHCb). Phys. Rev. Lett., 2013, 110: 222001; arXiv: 1302.6269[hep-ex][5] ZHANG Z H, GUO X H, YANG Y D. arXiv: 1308.5242[hep-ph][6] ZHANG Z H, GUO X H, YANG Y D. Phys. Rev. D, 2013, 87: 076007; arXiv: 1303.3676[hep-ph][7] Beringer et al. (Particle Data Group). Phys. Rev. D, 2012, 86: 010001[8] Abe K et al. (Belle collaboration). Phys. Rev. Lett., 2014, 93: 051803; arXiv: hep-ex/0307061

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ZHANG Zhen-Hua, LÜ Gang and WEI Ke-Wei. Probing the mass degeneracy of particles with different spins[J]. Chinese Physics C, 2015, 39(5): 053101. doi: 10.1088/1674-1137/39/5/053101

ZHANG Zhen-Hua, LÜ Gang and WEI Ke-Wei. Probing the mass degeneracy of particles with different spins[J]. Chinese Physics C, 2015, 39(5): 053101. doi: 10.1088/1674-1137/39/5/053101 shu

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Received: 2014-05-28
Revised: 2014-11-04

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

Probing the mass degeneracy of particles with different spins

Corresponding author: ZHANG Zhen-Hua,

Corresponding author: WEI Ke-Wei,

School of Nuclear Science and Technology, University of South China, Hengyang 421001, China;2 Cooperative Innovation Center for Nuclear Fuel Cycle Technology & Equipment, University of South China, Hengyang 421001, China;3 College of Science, Henan University of Technology, Zhengzhou 450001, China;4 College of Physics and Electrical Engineering, Anyang Normal University, Anyang 455002, China

Received Date: 2014-05-28
Accepted Date: 2014-11-04
Available Online: 2015-05-05

Abstract: The spin is an important property of a particle. Although it is unlikely, there is still a possibility that two particles with di erent spins share similar masses. In this paper, we propose a method to probe this kind of mass degeneracy of particles with di erent spins. We use the cascade decay B⁺→X(3872)K⁺, X(3872)→D⁺D^- to illustrate our method. It can be seen that the possible mass degeneracy of X(3872) can lead to interesting behavior in the corresponding cascade decay.