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首页> 外文期刊>Physical review, D >Exploring the spectrum of the hidden charm strange pentaquark in the SU(4) version of the flavor-spin model
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Exploring the spectrum of the hidden charm strange pentaquark in the SU(4) version of the flavor-spin model

机译：探讨隐藏的魅力奇怪的Pentaquark苏（4）版的味道旋转模型

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摘要

We study the spectrum of the isoscalar pentaquark u d s c c ˉ , of either positive or negative parity, in a constituent quark model with linear confinement and a flavor-spin hyperfine interaction previously extended to SU(4) and used to describe the spectrum of the u u d c c ˉ pentaquarks observed at LHCb in 2019. For positive parity we make a distinction between the case where one unit of angular momentum is located in the subsystem of four quarks and the case where the angular momentum is located in the relative motion between a ground-state four-quark subsystem and the antiquark. The novelty is that we introduce the coupling between different flavor states, due to the breaking of exact SU(4)-flavor symmetry of the Hamiltonian model, both for positive- and negative-parity states. An important consequence is that the lowest state, located at 4404?MeV, has quantum numbers J P = 1 / 2 ? while without coupling the lowest state has J P = 1 / 2 + or 3 / 2 + .
机译：在具有线性限制的组分夸克模型中，研究了阳性或阴性奇偶阶段的isoscalar pentaquark UDSCCα的光谱，以及预先扩展到Su（4）并用于描述UUDCCˉ的光谱 在2019年的LHCB观察到的Pentaquark。对于正奇偶校验，我们在四个夸克的子系统位于四个夸克的子系统和角动量位于地面四个之间的相对运动中的情况下区分了区分 -quark子系统和古董。 新颖性是，由于哈密顿模型的精确苏（4）-Flavor对称性，我们介绍了不同风味状态之间的耦合。 重要的结果是，位于4404的最低状态，位于4404？MEV，具有量子数J P = 1/2？ 虽然没有耦合最低状态是J P = 1/2 +或3/2 +。

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