论文标题
$ b_c $ like tetraquarks的电磁形式：分子和diquark-antidiquark图片
Electromagnetic form factors of the $B_c$-like tetraquarks: molecular and diquark-antidiquark pictures
论文作者
论文摘要
在这项研究中，我们使用分子和diquark-antidiquark Tetraquark图片来研究$ b_c $的磁性和四极矩，类似b_c $的基态tetraquarks具有QCD Light-light-sum-sum sul undum untum $ j^p = 1^+$。在数值分析中，为了获得$ b_c $的四夸克状态的磁性和四极矩，已经使用了插值电流的分子和diquark-antidiquark形式，以及光子分布幅度。磁矩被作为$μ_{z_ {z_ {uc \ bar u \ bar b}}^{mol} = 1.18^{+0.52} _ { - 0.40} 〜μ_n $，$μ_ b}}}^{di} = 3.05^{+1.19} _ { - 0.95} 〜μ_n $，$μ__{z__ {z_ {dc \ bar d \ bar d \ bar b}}^{mol}^{mol} = 0.32^{+0.32^{+0.18} _ {+0.18} _ { - 0.10} _ {-0.10}} \ bar b}}}^{di} = 2.38^{+0.95} _ { - 0.75} 〜μ_n $。 Hadron的磁性和四极矩是可以观察到的另一个基本量，它提供了有关基础夸克结构和动力学的信息。两张图片中获得的结果彼此差异很大。对磁矩的任何实验测量都可以理解这些状态的内部结构。对于$ b_c $ like的四夸克状态的四极矩时，我们获得了非零但值的小值。希望这项研究中给出的考试将有助于对它们进行实验搜索，这将是一个有趣的研究主题。
In this study, we use the molecular and diquark-antidiquark tetraquark pictures to investigate magnetic and quadrupole moments of the $B_c$-like ground state tetraquarks with the QCD light-cone sum rules with quantum numbers $J^P = 1^+$. In the numerical analysis, to obtain the magnetic and quadrupole moments of $B_c$-like tetraquark states molecular and diquark-antidiquark forms of interpolating currents, and photon distribution amplitudes have been used. The magnetic moments are acquired as $ μ_{Z_{uc \bar u \bar b}}^{Mol}=1.18^{+0.52}_{-0.40}~μ_N$, $μ_{Z_{uc \bar u \bar b}}^{Di}=3.05^{+1.19}_{-0.95}~μ_N$, $μ_{Z_{dc \bar d \bar b}}^{Mol}=0.32^{+0.18}_{-0.10}~μ_N$, and $μ_{Z_{dc \bar d \bar b}}^{Di}=2.38^{+0.95}_{-0.75}~μ_N$. The hadrons' magnetic and quadrupole moments are another fundamental observable as their mass, which provides information on the underlying quark structure and dynamics. The results obtained in both pictures are quite different from each other. Any experimental measurement of the magnetic moments can provide an understanding of the internal structure of these states. We get nonzero but small values for the quadrupole moments of $B_c$-like tetraquark states showing non-spherical charge distributions. Hopefully, the examinations given in this study will be helpful to an experimental search of them, which will be an interesting research subject.
