论文标题
$ p_ {cc}^n $状态在单位化耦合通道方法中
$P_{cc}^N$ states in a unitarized coupled-channel approach
论文作者
论文摘要
从具有重夸克自旋对称性的有效拉格朗日开始，研究了双重魅力系统的耦合通道动力学$ d^{（*）}σ_c^{（*）} $。我们的调查潜力包括$ t $ channel pseudoscalar和矢量梅森交易所。通过应用$ n/d $方法的第一个迭代解决方案来找到一系列带有isospin $ i = 1/2 $的限制状态：一个具有约束力的能源$ 23 $ MEV的状态，$ 5/2^ - $ $ $ $ $ $ d^*σ_c^*$ channel，三个具有约束力，$ 30 $ $ 7 $ MEV的状态，相对于$ 26 $，$ 7 $ 3/2^ - $ $ $dς_c^*$ - $ d^*σ_c$ - $ d^*σ_c^*$ system和三个具有绑定能源的状态$ 32 $，$ 8 $和$ 16 $ MEV，$ 1/2^ - $ $ $ $ $ $ $ $ $ $ DPINDPINCOL- $ DT^*σ_C$ d^*σ_C$ - $ d^*$ d^*f^*$ SAMPEL。那些$ p_ {cc}^n $状态是LHCB协作观察到的隐藏魅力pentaquarks $p_ψ^n $的开放式合作伙伴。
Starting from an effective Lagrangian with heavy quark spin symmetry embedded, the coupled-channel dynamics of the doubly charmed systems $D^{(*)} Σ_c^{(*)}$ is investigated. The potential underlying our investigation includes $t$-channel pseudoscalar and vector meson exchanges. A series of $S$-wave bound states with isospin $I=1/2$ is found by applying the first iterated solution of the $N/D$ method: one state with binding energy $23$ MeV in the $5/2^-$ $D^*Σ_c^*$ channel, three states with binding energy $26$, $30$ and $7$ MeV (relative to the thresholds from low to high, respectively) in the $3/2^-$ $DΣ_c^*$-$D^*Σ_c$-$D^*Σ_c^*$ system and three states with binding energy $32$, $8$ and $16$ MeV in the $1/2^-$ $DΣ_c$-$D^*Σ_c$-$D^*Σ_c^*$ system. Those $P_{cc}^N$ states serve as the open-charm partners of the hidden charm pentaquarks $P_ψ^N$ observed by the LHCb Collaboration.
