A model to explain the angular distribution of J/Ψ and Ψ(2S) decay into ■ and ■
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摘要
BESⅢ data show a particular angular distribution for the decay of J/Ψ and Ψ(2 S) mesons into ■ and Σ~0Σ~0 hyperons: the angular distribution of the decay Ψ(2 S) →Σ~0Σ~0 exhibits an opposite trend with respect to the other three channels: J/Ψ→■, J/Ψ→Σ~0Σ~0 and Ψ(2 S) →■. We define a model to explain the origin of this phenomenon.
BESⅢ data show a particular angular distribution for the decay of J/Ψ and Ψ(2 S) mesons into ■ and Σ~0Σ~0 hyperons: the angular distribution of the decay Ψ(2 S) →Σ~0Σ~0 exhibits an opposite trend with respect to the other three channels: J/Ψ→■, J/Ψ→Σ~0Σ~0 and Ψ(2 S) →■. We define a model to explain the origin of this phenomenon.
BESⅢ data show a particular angular distribution for the decay of J/Ψ and Ψ(2 S) mesons into ■ and Σ~0Σ~0 hyperons: the angular distribution of the decay Ψ(2 S) →Σ~0Σ~0 exhibits an opposite trend with respect to the other three channels: J/Ψ→■, J/Ψ→Σ~0Σ~0 and Ψ(2 S) →■. We define a model to explain the origin of this phenomenon.
引文
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2 M. Ablikim et al(BES Collaboration), Phys. Lett. B, 632:181(2006)
3 M. Ablikim et al(BESⅢCollaboration), Phys. Rev. D, 95(5):052003(2017)
4 M. Gell-Mann, Phys. Rev., 125:1067(1962)
5 K. Zhu, X. H. Mo, and C. Z. Yuan, Int. J. Mod. Phys. A, 30(25):1550148(2015)
6 M. Ablikim et al(BESⅢCollaboration), arXiv:1808.08917[hepex]
7 M. Ablikim et al(BESⅢCollaboration), Chin. Phys. C, 37:063001(2013)
8 B. Aubert et al(BaBar Collaboration), Phys. Rev. D, 76:092006(2007)
9 T. K. Pedlar et al(CLEO Collaboration), Phys. Rev. D, 72:051108(2005)
10 M. Ablikim et al(BES Collaboration), Phys. Lett. B, 648:149(2007)
11 S. Dobbs, A. Tomaradze, T. Xiao, K. K. Seth, and G. Bonvicini,Phys. Lett. B, 739:90(2014)
12 M. Ablikim et al(BESⅢCollaboration), Phys. Lett. B, 770:217(2017)
13 M. Ablikim et al(BESⅢCollaboration), Phys. Rev. D, 93(7):072003(2016), arXiv:1602.06754[hep-ph]
14 L. Yan(BESⅢCollaboration), private communication
15 G. Salzman, Phys. Rev., 99:973(1955)
16 F. J. Ernst, R. G. Sachs, and K. C. Wali, Phys. Rev., 119:1105(1960)
17 M. Claudson, S. L. Glashow, and M. B. Wise, Phys. Rev. D, 25:1345(1982)
18 C. Patrignani et al(Particle Data Group), Chin. Phys. C, 40(10):100001(2016)
1)When the non-constant matrixΓ~μis introduced to describe the EM couplingγB(?), the tensor term contains also the anomalous magnetic moment, that, in this case whereΓ~μparametrises the strong vertexΨB(?),has been embodied in the strong Pauli coupling.
2 M. Ablikim et al(BES Collaboration), Phys. Lett. B, 632:181(2006)
3 M. Ablikim et al(BESⅢCollaboration), Phys. Rev. D, 95(5):052003(2017)
4 M. Gell-Mann, Phys. Rev., 125:1067(1962)
5 K. Zhu, X. H. Mo, and C. Z. Yuan, Int. J. Mod. Phys. A, 30(25):1550148(2015)
6 M. Ablikim et al(BESⅢCollaboration), arXiv:1808.08917[hepex]
7 M. Ablikim et al(BESⅢCollaboration), Chin. Phys. C, 37:063001(2013)
8 B. Aubert et al(BaBar Collaboration), Phys. Rev. D, 76:092006(2007)
9 T. K. Pedlar et al(CLEO Collaboration), Phys. Rev. D, 72:051108(2005)
10 M. Ablikim et al(BES Collaboration), Phys. Lett. B, 648:149(2007)
11 S. Dobbs, A. Tomaradze, T. Xiao, K. K. Seth, and G. Bonvicini,Phys. Lett. B, 739:90(2014)
12 M. Ablikim et al(BESⅢCollaboration), Phys. Lett. B, 770:217(2017)
13 M. Ablikim et al(BESⅢCollaboration), Phys. Rev. D, 93(7):072003(2016), arXiv:1602.06754[hep-ph]
14 L. Yan(BESⅢCollaboration), private communication
15 G. Salzman, Phys. Rev., 99:973(1955)
16 F. J. Ernst, R. G. Sachs, and K. C. Wali, Phys. Rev., 119:1105(1960)
17 M. Claudson, S. L. Glashow, and M. B. Wise, Phys. Rev. D, 25:1345(1982)
18 C. Patrignani et al(Particle Data Group), Chin. Phys. C, 40(10):100001(2016)
1)When the non-constant matrixΓ~μis introduced to describe the EM couplingγB(?), the tensor term contains also the anomalous magnetic moment, that, in this case whereΓ~μparametrises the strong vertexΨB(?),has been embodied in the strong Pauli coupling.