柯红卫 2018.3.31 兰州大学 Hong-Wei Ke and Xue-Qian Li, arXiv:1802.08823 and arXiv:1801.00675
Outline 实验的现状 理论的现状 分子态与tetraquark的混合 分子态衰变的计算 混合结果及预言
D0 Collaboration 2016 arXiv:1602.07588 实验的现状 正面 D0 Collaboration 2016 arXiv:1602.07588 Phys.Rev.Lett. 117, 022003(2016) 2017 arXiv:1712.10176 5568 Bs π J/ψ φ 5568 Bs π Ds μ
LHCb Collaboration, arXiv:1608.00435 PRL118, 109904 (2017) 负面 LHCb Collaboration, arXiv:1608.00435 PRL118, 109904 (2017) CMS Collaboration, arXiv:1712.06144 CDF Collaboration, arXiv:1712.09620 ATLAS Collaboration, arXiv:1802.01840
理论的现状 Tetraquark 正面 S. S. Agaev, K. Azizi and H. Sundu, PRD93, 074024 (2016) [arXiv:1602.08642 ]； PRD93, 114007 (2016) [arXiv:1603.00290]; Phys. Rev. D 93, 094006 (2016)[arXiv:1603.01471]; arXiv:1603.02708; arXiv:1608.04785 Z. G. Wang, Commun. Theor. Phys. 66, 335 (2016) [arXiv:1602.08711 ]; Eur. Phys. J. C76 (2016) 279[arXiv:1603.02498] W. Chen, H. X. Chen, X. Liu, T. G. Steele and S. L. Zhu, PRL 117, 022002 (2016) [arXiv:1602.08916 ] Y. R. Liu, X. Liu and S. L. Zhu, PRD93, 074023 (2016) [arXiv:1603.01131 ] J. M. Dias, K. P. Khemchandani, A. Martínez Torres, M. Nielsen and C. M. Zanetti, PLB 758, 235 (2016) [arXiv:1603.02249]. F.~Stancu, J. Phys. G43, 105001 (2016) [arXiv:1603.03322 [hep-ph]]. J. R. Zhang, J. L. Zou and J. Y. WuChin. Phys. C42, 043101 (2018) [arXiv:1705.03741].
Tetraquark 负面 W. Wang and R. Zhu, Chin. Phys Tetraquark 负面 W. Wang and R. Zhu, Chin. Phys. C40, 093101 (2016) [arXiv:1602.08806 [hep-ph]].
分子态正面 Z. Y. Wang, J. J. Qi, C. Wang and X. H. Guo, arXiv:1802.04566. H. W. Ke and X. Q. Li, arXiv:1801.00675. S. S. Agaev, K. Azizi and H. Sundu,arXiv:1603.02708 分子态负面 M. Albaladejo, J. Nieves, E. Oset, Z. F. Sun and X. Liu, PLB, 757, 515 (2016) [arXiv:1603.09230 ]. X. W. Kang and J. A. Oller, PRD94, 054010 (2016) [arXiv:1606.06665]. C. B. Lang, D. Mohler and S. Prelovsek, PRD94, 074509 (2016) [arXiv:1607.03185 ] R. Chen and X. Liu, PRD94, 034006 (2016) [arXiv:1607.05566 ]. J. X. Lu, X. L. Ren and L. S. Geng, EPJC77, 94 (2017) [arXiv:1607.06327 ].
X(5568)的存在性 负面 T. J. Burns and E. S. Swanson, PLB760, 627(2016) [arXiv:1603.04366 ] X. Chen and J. Ping, EPJC76,351 (2016)[arXiv:1604.05651 ] F. K. Guo, U. G. Meißner and B. S. Zou, Commun. Theor. Phys. 65, 593 (2016) [arXiv:1603.06316 [hep-ph]] Z. Yang, Q. Wang and U. G. Meißner, PLB767, 470(2017) [arXiv:1609.08807] D. Mohler, C. B. Lang and S. Prelovsek, PoS LATTICE2016, 391 (2016)
T. J. Burns and E. S. Swanson, Interpreting the X(5568), PLB760, 627(2016) [arXiv:1603.04366 ] 分析了Threshold Effects、 Cusp Effects、 The Molecular 、Tetraquark
3. 分子态与tetraquark的混合 我们注意的理论上的分歧主要在能谱，无论假设为分子态还是Tetraquark态，衰变的宽度基本上可以和D0实验符合。混合能否同时缓和实验的矛盾和能谱的分歧？ R. Albuquerque, S. Narison, A. Rabemananjara and D. Rabetiarivony, Nature of the X(5568) : a critical Laplace sum rule analysis at N2LO, Int. J. Mod. Phys. A 31, 1650093 (2016)[arXiv:1604.05566].
4、分子态衰变的计算 矩阵元
在推广的光前模型下计算 有效的相互作用顶点
得到 参数
5、混合结果及预言 由两个耦合常数
得到 5568 MeV 实验寻找
谢谢大家！