论文标题
预测$ \ bar {d} _s^{（*）} d_s^{（*）} $绑定状态为$ x（3872）$
Predicting the $\bar{D}_s^{(*)} D_s^{(*)}$ bound states as the partners of $X(3872)$
论文作者
论文摘要
在这项工作中，我们研究了SU（3）风味对称性，重夸克自旋对称性及其在Di-Meson系统中的破坏作用。我们证明了$ [\ bar {d} _ {s}^{*} d_ {s}^{*}]^{0^{++}} $， $ [\ bar {d} _ {s}^{*} d_ {s}/\ bar {d} _ {s}^{} d_ {s} d_ {s}^*]^{1^{+ - }}} $， $ [\ bar {d} _ {s}^{*} d_ {s}^{*}]^{1^{+ - }} $绑定的状态是su（3）风味对称性和重型夸克旋转对称性的两个先决条件的结果。第一个先决条件为$ x（3872）$作为弱$ \ bar {d}^{*} d/\ bar {d} d} d^{*} $绑定状态的质量和衰减分支比率支持。第二个先决条件是$ [\ bar {d} _ {s} d_ {s}]^{0^{0^{++}} $ bound状态由lattice QCD计算[arxiv：arxiv：arxiv：arxiv：arxiv：2011.02542（hep-lat）]和$ ub的$ c0（c02542（hep-lat））（$ ub）（39330）协作[Phys.Rev.LeTt.125,242001，Phys.Rev.D102,112003]。我们希望未来的实验分析可以在$ b \ to d _ {（s）}^{（*）} \ bar {d}^{（*）} _ {（s）} h $ processes（$ h $表示浅色hadrons）中搜索这些约束状态。 $ [\ bar {d} _ {s}^{*} d_ {s}^{*}]^{0^{++}} $也预计$ bound状态也有望在$ j/ψ($ b \ b \ b \ to j/ψϕk $ decay中重建。
In this work, we investigate the SU(3) flavor symmetry, heavy quark spin symmetry and their breaking effects in the di-meson systems. We prove the existence of the $[\bar{D}_{s}^{*}D_{s}^{*}]^{0^{++}}$, $[\bar{D}_{s}^{*}D_{s}/\bar{D}_{s}^{}D_{s}^*]^{1^{+-}}$, and $[\bar{D}_{s}^{*}D_{s}^{*}]^{1^{+-}}$ bound states as the consequence of two prerequisites in the SU(3) flavor symmetry and heavy quark spin symmetry. The first prerequisite, the $X(3872)$ as the weakly $\bar{D}^{*}D/\bar{D} D^{*}$ bound state is supported by its mass and decay branching ratios. The second prerequisite, the existence of the $[\bar{D}_{s}D_{s}]^{0^{++}}$ bound state is supported by the lattice QCD calculation [arXiv:2011.02542(hep-lat)] and the observation of $χ_{c0}(3930)$ by the LHCb Collaboration[Phys.Rev.Lett.125,242001, Phys.Rev.D102,112003]. We hope the future experimental analyses can search for these bound states in the $B\to D_{(s)}^{(*)}\bar{D}^{(*)}_{(s)}h$ processes ($h$ denotes the light hadrons). The $[\bar{D}_{s}^{*}D_{s}^{*}]^{0^{++}}$ bound state is also expected to be reconstructed in the $J/ψϕ$ final state in the $B\to J/ψϕK$ decay.
