用手征有效场论破译带电重类夸克态
Deciphering the charged heavy quarkoniumlike states in chiral effective field theory
摘要：
我们推广了手征有效场论的框架，研究了等矢量$D^\ast\bar{D}^{(\ast)}$和$B^\ast\bar{B}^{(\ast)}$系统的相互作用直到次主导阶，其中包含了长、中、短程力的贡献以及$S$ - $D$波混频.基于Lippmann-Schwinger方程，拟合了BESIII和Belle合作组测量的弹性通道的不变质量分布。结果表明，四种电荷态$Z_c(3900)$，$Z_c(4020)$和$Z_b(10610)$，$Z_b(10650)$可以很好地确定为$D\bar{D}^{\ast},D^\ast\bar{D}^{\ast}$和$B\bar{B}^{\ast},B^\ast\bar{B}^{\ast}$分子共振态.束缚态解释在我们的框架中被否决了。我们的研究表明，在重夸克对称性下，$Z_c$和$Z_b$态是孪生伙伴。
英文摘要：
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 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.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
