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首页> 外文期刊>Physics Letters, B. Nuclear Physics and High Energy Physics >Anatomy of the newly observed hidden-charm pentaquark states: P-C(4312), P-C(4440) and P-C(4457)
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Anatomy of the newly observed hidden-charm pentaquark states: P-C(4312), P-C(4440) and P-C(4457)

机译:新观察到的隐藏魅力Pentaquark的解剖学状态:P-C(4312),P-C(4440)和P-C(4457)

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摘要

We study the newly reported hidden-charm pentaquark candidates P-C(4312), P-C(4440) and P-C(4457) from the LHCb Collaboration, in the framework of the effective-range expansion and resonance compositeness relations. The scattering lengths and effective ranges from the S-wave Sigma(C) (D) over bar and Sigma(C) (D) over bar* scattering are calculated by using the experimental results of the masses and widths of the P-C(4312), P-C(4440) and P-C(4457). Then we calculate the couplings between the J/psi p, Sigma(C) (D) over bar channels and the pentaquark candidate P-C(4312), with which we further estimate the probabilities of finding the J/psi p and E-C(D) over bar components inside P-C(4312). The partial decay widths and compositeness coefficients are calculated for the P-C(4440) and P-C(4457) states by including the J/psi p and Sigma(C) (D) over bar* channels. Similar studies are also carried out for the three P-C states by including the Lambda(C)(D) over bar* and Sigma(C) (D) over bar ((*)) channels. (C) 2019 The Authors. Published by Elsevier B.V.
机译:我们在有效范围扩展和共振合并关系的框架中研究了新报告的隐藏魅力Pentaquark候选P-C(4312),P-C(4440)和P-C(4457)。通过使用PC的质量和宽度的实验结果来计算来自S波Σ(C)(C)(D)的散射长度和有效范围,通过块状和散射计算散射(4312) ,PC(4440)和PC(4457)。然后,我们计算j / psi p,sigma(c)(d)上的耦合,通过条形通道和Pentaquark候选PC(4312),我们进一步估计了查找J / PSI P和EC(D)的概率PC内的条形组件(4312)。通过在Bar *信道上包括j / psi p和sigma(d)来计算P-C(4440)和P-C(4457)状态的部分衰减宽度和合成系数。通过将三种P-C态进行类似的研究,通过在酒吧((*))通道上包含λ(c)(d)(c)(c)(d)k和sigma(c)(d)。 (c)2019年作者。由elsevier b.v出版。

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