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arXiv 1402.3974hep-ph
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隐魅扇区中四种夸克态的质量谱

Mass spectra of four quark states in hidden charm sector

Smruti Patel, Manan Shah, P C Vinodkumar

摘要:

在非相对论夸克模型的框架下计算了隐魅扇区($cq\bar c \bar q; q\in u,d$)中低位四夸克态的质量。四体系统被认为是双夸克-反双夸克($Qq-\bar Q \bar q$)和夸克反夸克-夸克反夸克($Q\bar q -\bar Qq$)两个二体系统的类分子四夸克态。本文用Cornell型势描述了$Q-q$、$\bar Q-\bar q$、$Q-\bar q$、$Qq-\bar Q \bar q$和$Q\bar q-\bar Qq$之间的两体相互作用。我们的分析表明,$X(3823)$,$Z_c(3900)$,$X(3915)$,$Z_c(4025)$,$ψ(4040)$,$Z_1(4050)$和$X(4160)$是$Q\bar q-\bar Qq$类分子四夸克态,而$Z_c(3885)$,$X(3940)$和$Y(4140)$是双夸克-反双夸克四夸克态.我们已经能够分配的$J^{PC}$值为许多最近观察到的奇异状态,根据其结构。除此之外,我们还确定了最近由LHCb证实的带电态$Z(4430)$是G=+1的$Zc(3885)$的第一径向激发,$Y(4360)$态是$Y(4008)$和$G=-1$的第一径向激发,$ψ(4415)$态是$ψ(4040)$态的第一径向激发。

英文摘要:

Masses of the low lying four quark states in the hidden charm sector ($cq\bar c \bar q; q\in u,d$) are calculated within the framework of a non-relativistic quark model. The four body system is considered as two two-body systems such as diquark-antidiquark ($Qq-\bar Q \bar q$) and quark antiquark-quark antiquark ($Q\bar q -\bar Qq$) molecular-like four quark states. Here, Cornell type potential has been used for describing the two body interactions among $Q-q$, $\bar Q-\bar q$, $Q-\bar q$, $Qq-\bar Q \bar q$ and $Q\bar q-\bar Qq$, with appropriate string tensions. Our present analysis suggests the following exotic states, $X(3823)$, $Z_c(3900)$, $X(3915)$, $Z_c(4025)$, $ψ(4040)$, $Z_1(4050)$ and $X(4160)$ as $Q\bar q-\bar Qq$ molecular-like four quark states while $Z_c(3885)$, $X(3940)$ and $Y(4140)$ as the diquark-antidiquark four quark states. We have been able to assign the $J^{PC}$ values for many of the recently observed exotic states according to their structure. Apart from this, we have identified the charged state $Z(4430)$ recently confirmed by LHCb as the first radial excitation of $Zc(3885)$ with G=+1 and $Y(4360)$ state as the first radial excitation of $Y(4008)$ with $G=-1$ and the state $ψ(4415)$ as the first radial excitation of the $ψ(4040)$ state.

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。

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