论文标题
在手性有效野外理论中解密带电的重夸克状状态
Deciphering the charged heavy quarkoniumlike states in chiral effective field theory
论文作者
论文摘要
We generalize the framework of chiral effective field theory to study the interactions of the isovector $D^\ast\bar{D}^{(\ast)}$ and $B^\ast\bar{B}^{(\ast)}$ systems up to the next-to-leading order, in which the long-, mid-, and short-range force contributions as well as the $S$-$D$ wave mixing被合并。基于Lippmann-Schwinger方程，我们符合BESIII和Belle合作测量的弹性通道的不变质量分布。我们的结果表明，四个充电的Charmoniumlike和Bostomeniumlike状态$ z_c（3900）$，$ z_c（4020）$和$ z_b（10610）$，$ z_b（10650）$可以很好地识别为$ d \ bar {d} $ b \ bar {b}^{\ ast}，b^\ ast \ bar {b}^{\ ast} $分子共振。在我们的框架中否决了界面的解释。我们的研究有利于$ z_c $和$ z_b $ state是重型夸克对称下的双胞胎合作伙伴。
We generalize the framework of chiral effective field theory to study the interactions of the isovector $D^\ast\bar{D}^{(\ast)}$ and $B^\ast\bar{B}^{(\ast)}$ systems up to the next-to-leading order, in which the long-, mid-, and short-range force contributions as well as the $S$-$D$ wave mixing are incorporated. Based on the Lippmann-Schwinger equation, we fit the invariant mass distributions of the elastic channels measured by the BESIII and Belle Collaborations. Our results indicate that the four charged charmoniumlike and bottomoniumlike states $Z_c(3900)$, $Z_c(4020)$ and $Z_b(10610)$, $Z_b(10650)$ can be well identified as the $D\bar{D}^{\ast},D^\ast\bar{D}^{\ast}$ and $B\bar{B}^{\ast},B^\ast\bar{B}^{\ast}$ molecular resonances. The bound state explanations are vetoed in our framework. Our study favors the $Z_c$ and $Z_b$ states are the twin partners under the heavy quark symmetry.
